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2
.gitignore vendored
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@ -62,3 +62,5 @@ jmeter/src/main/resources/*-JMeter.csv
**/dist
**/tmp
**/out-tsc
**/nbproject/
**/nb-configuration.xml

33
README.md
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@ -2,41 +2,22 @@
The "REST with Spring" Classes
==============================
Here's the Master Class of REST With Spring (price changes permanently next Friday): <br/>
**[>> THE REST WITH SPRING MASTER CLASS](http://www.baeldung.com/rest-with-spring-course?utm_source=github&utm_medium=social&utm_content=tutorials&utm_campaign=rws#master-class)**
Here's the Master Class of REST With Spring (along with the newly announced Boot 2 material): <br/>
**[>> THE REST WITH SPRING - MASTER CLASS](http://www.baeldung.com/rest-with-spring-course?utm_source=github&utm_medium=social&utm_content=tutorials&utm_campaign=rws#master-class)**
And here's the Master Class of Learn Spring Security: <br/>
**[>> LEARN SPRING SECURITY MASTER CLASS](http://www.baeldung.com/learn-spring-security-course?utm_source=github&utm_medium=social&utm_content=tutorials&utm_campaign=lss#master-class)**
**[>> LEARN SPRING SECURITY - MASTER CLASS](http://www.baeldung.com/learn-spring-security-course?utm_source=github&utm_medium=social&utm_content=tutorials&utm_campaign=lss#master-class)**
Spring Tutorials
Java and Spring Tutorials
================
This project is **a collection of small and focused tutorials** each covering a single and well defined area of development.
Most of the tutorial projects are focused on the `Spring Framework` (and `Spring Security`).
This project is **a collection of small and focused tutorials** - each covering a single and well defined area of development in the Java ecosystem.
A strong focus of these is, of course, the Spring Framework - Spring, Spring Boot and Spring Securiyt.
In additional to Spring, the following technologies are in focus: `core Java`, `Jackson`, `HttpClient`, `Guava`.
Building the project
====================
To do the full build, do: `mvn install -Pdefault -Dgib.enabled=false`
Working with the code in Eclipse
================================
Any IDE can be used to work with the projects, but if you're using Eclipse, consider the following.
- import the included **formatter** in Eclipse:
`https://github.com/eugenp/tutorials/tree/master/eclipse`
CI - Jenkins
================================
This tutorials project is being built **[>> HERE](https://rest-security.ci.cloudbees.com/job/tutorials-unit/)**
### Relevant Articles:
================================
- [Apache Maven Standard Directory Layout](http://www.baeldung.com/maven-directory-structure)
- [Apache Maven Tutorial](http://www.baeldung.com/maven)
- [Designing a User Friendly Java Library](http://www.baeldung.com/design-a-user-friendly-java-library)

25
Twitter4J/pom.xml
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@ -1,13 +1,9 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.mabsisa</groupId>
<artifactId>Twitter4J</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>Twitter4J</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>com.baeldung</groupId>
@ -23,27 +19,6 @@
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<excludes>
<exclude>**/ApplicationTest.java</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<twitter4j-stream.version>4.0.6</twitter4j-stream.version>
</properties>

47
activejdbc/pom.xml
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@ -1,7 +1,6 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>activejdbc</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
@ -79,55 +78,11 @@
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<reportFormat>brief</reportFormat>
<trimStackTrace>true</trimStackTrace>
<useFile>false</useFile>
<includes>
<include>**/*Spec*.java</include>
<include>**/*Test*.java</include>
</includes>
<excludes>
<exclude>**/helpers/*</exclude>
<exclude>**/*$*</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>snapshots1</id>
<name>JavaLite Snapshots1</name>
<url>http://repo.javalite.io/</url>
<snapshots>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>snapshots2</id>
<name>JavaLite Snapshots2</name>
<url>http://repo.javalite.io/</url>
<snapshots>
<enabled>true</enabled>
<updatePolicy>always</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</snapshots>
</pluginRepository>
</pluginRepositories>
<properties>
<activejdbc.version>1.4.13</activejdbc.version>
<activejdbc.version>2.0</activejdbc.version>
<environments>development.test,development</environments>
<mysql.connector.version>5.1.34</mysql.connector.version>
</properties>

4
activejdbc/src/main/java/com/baeldung/model/Employee.java
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@ -16,4 +16,8 @@ public class Employee extends Model {
set("created_by",createdBy);
}
public String getLastName() {
return getString("last_name");
}
}

4
activejdbc/src/main/java/com/baeldung/model/Role.java
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@ -15,4 +15,8 @@ public class Role extends Model {
set("role_name",role);
set("created_by",createdBy);
}
public String getRoleName() {
return getString("role_name");
}
}

2
activejdbc/src/test/java/com/baeldung/ActiveJDBCAppTest.java → activejdbc/src/test/java/com/baeldung/ActiveJDBCAppManualTest.java
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@ -7,7 +7,7 @@ import org.junit.Test;
import java.util.List;
public class ActiveJDBCAppTest extends DBSpec
public class ActiveJDBCAppManualTest extends DBSpec
{
@Test
public void ifEmployeeCreated_thenIsValid() {

4
algorithms/README.md
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@ -24,3 +24,7 @@
- [Practical Java Examples of the Big O Notation](http://www.baeldung.com/java-algorithm-complexity)
- [Find the Middle Element of a Linked List](http://www.baeldung.com/java-linked-list-middle-element)
- [An Introduction to the Theory of Big-O Notation](http://www.baeldung.com/big-o-notation)
- [Check If Two Rectangles Overlap In Java](https://www.baeldung.com/java-check-if-two-rectangles-overlap)
- [Calculate the Distance Between Two Points in Java](https://www.baeldung.com/java-distance-between-two-points)
- [Find the Intersection of Two Lines in Java](https://www.baeldung.com/java-intersection-of-two-lines)
- [Check If a String Contains All The Letters of The Alphabet](https://www.baeldung.com/java-string-contains-all-letters)

1
algorithms/roundUpToHundred/.gitignore vendored Normal file
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@ -0,0 +1 @@
/bin/

20
algorithms/roundUpToHundred/src/com/java/src/RoundUpToHundred.java Normal file
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@ -0,0 +1,20 @@
package com.java.src;
import java.util.Scanner;
public class RoundUpToHundred {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double input = scanner.nextDouble();
scanner.close();
RoundUpToHundred.round(input);
}
static long round(double input) {
long i = (long) Math.ceil(input);
return ((i + 99) / 100) * 100;
};
}

14
algorithms/roundUpToHundred/src/com/java/src/RoundUpToHundredTest.java Normal file
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@ -0,0 +1,14 @@
package com.java.src;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class RoundUpToHundredTest {
@Test
public void givenInput_whenRound_thenRoundUpToTheNearestHundred() {
assertEquals("Rounded up to hundred", 100, RoundUpToHundred.round(99));
assertEquals("Rounded up to three hundred ", 300, RoundUpToHundred.round(200.2));
assertEquals("Returns same rounded value", 400, RoundUpToHundred.round(400));
}
}

41
algorithms/src/main/java/com/baeldung/algorithms/insertionsort/InsertionSort.java Normal file
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@ -0,0 +1,41 @@
package com.baeldung.algorithms.insertionsort;
public class InsertionSort {
public static void insertionSortImperative(int[] input) {
for (int i = 1; i < input.length; i++) {
int key = input[i];
int j = i - 1;
while (j >= 0 && input[j] > key) {
input[j + 1] = input[j];
j = j - 1;
}
input[j + 1] = key;
}
}
public static void insertionSortRecursive(int[] input) {
insertionSortRecursive(input, input.length);
}
private static void insertionSortRecursive(int[] input, int i) {
// base case
if (i <= 1) {
return;
}
// sort the first i - 1 elements of the array
insertionSortRecursive(input, i - 1);
// then find the correct position of the element at position i
int key = input[i - 1];
int j = i - 2;
// shifting the elements from their position by 1
while (j >= 0 && input[j] > key) {
input[j + 1] = input[j];
j = j - 1;
}
// inserting the key at the appropriate position
input[j + 1] = key;
}
}

2
algorithms/src/main/java/com/baeldung/algorithms/kthlargest/FindKthLargest.java
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@ -98,7 +98,7 @@ public class FindKthLargest {
private int randomPartition(Integer arr[], int left, int right) {
int n = right - left + 1;
int pivot = (int) (Math.random()) % n;
int pivot = (int) (Math.random() * n);
swap(arr, left + pivot, right);
return partition(arr, left, right);
}

50
algorithms/src/main/java/com/baeldung/algorithms/mergesort/MergeSort.java Normal file
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@ -0,0 +1,50 @@
package com.baeldung.algorithms.mergesort;
public class MergeSort {
public static void main(String[] args) {
int[] a = { 5, 1, 6, 2, 3, 4 };
mergeSort(a, a.length);
for (int i = 0; i < a.length; i++)
System.out.println(a[i]);
}
public static void mergeSort(int[] a, int n) {
if (n < 2)
return;
int mid = n / 2;
int[] l = new int[mid];
int[] r = new int[n - mid];
for (int i = 0; i < mid; i++) {
l[i] = a[i];
}
for (int i = mid; i < n; i++) {
r[i - mid] = a[i];
}
mergeSort(l, mid);
mergeSort(r, n - mid);
merge(a, l, r, mid, n - mid);
}
public static void merge(int[] a, int[] l, int[] r, int left, int right) {
int i = 0, j = 0, k = 0;
while (i < left && j < right) {
if (l[i] < r[j])
a[k++] = l[i++];
else
a[k++] = r[j++];
}
while (i < left)
a[k++] = l[i++];
while (j < right)
a[k++] = r[j++];
}
}

39
algorithms/src/main/java/com/baeldung/algorithms/quicksort/QuickSort.java Normal file
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@ -0,0 +1,39 @@
package com.baeldung.algorithms.quicksort;
public class QuickSort {
public static void quickSort(int arr[], int begin, int end)
{
if (begin < end) {
int partitionIndex = partition(arr, begin, end);
// Recursively sort elements of the 2 sub-arrays
quickSort(arr, begin, partitionIndex-1);
quickSort(arr, partitionIndex+1, end);
}
}
private static int partition(int arr[], int begin, int end)
{
int pivot = arr[end];
int i = (begin-1);
for (int j=begin; j<end; j++)
{
if (arr[j] <= pivot) {
i++;
int swapTemp = arr[i];
arr[i] = arr[j];
arr[j] = swapTemp;
}
}
int swapTemp = arr[i+1];
arr[i+1] = arr[end];
arr[end] = swapTemp;
return i+1;
}
}

38
algorithms/src/main/java/com/baeldung/algorithms/quicksort/ThreeWayQuickSort.java Normal file
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@ -0,0 +1,38 @@
package com.baeldung.algorithms.quicksort;
public class ThreeWayQuickSort {
public static void threeWayQuickSort(int[] a, int begin, int end)
{
if (end <= begin) return;
// partition
int i = begin;
int less = begin;
int greater = end;
while (i <= greater){
if (a[i] < a[less]) {
int tmp = a[i];
a[i] = a[less];
a[less] = tmp;
i++;
less++;
}
else if (a[less] < a[i]) {
int tmp = a[i];
a[i] = a[greater];
a[greater] = tmp;
greater--;
}
else {
i++;
}
}
threeWayQuickSort(a, begin, less - 1);
threeWayQuickSort(a, greater + 1, end);
}
}

29
algorithms/src/main/java/com/baeldung/algorithms/rectanglesoverlap/Point.java Normal file
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@ -0,0 +1,29 @@
package com.baeldung.algorithms.rectanglesoverlap;
public class Point {
private int x;
private int y;
public Point(int x, int y) {
this.x = x;
this.y = y;
}
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
}

40
algorithms/src/main/java/com/baeldung/algorithms/rectanglesoverlap/Rectangle.java Normal file
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@ -0,0 +1,40 @@
package com.baeldung.algorithms.rectanglesoverlap;
public class Rectangle {
private Point bottomLeft;
private Point topRight;
public Rectangle(Point bottomLeft, Point topRight) {
this.bottomLeft = bottomLeft;
this.topRight = topRight;
}
public Point getBottomLeft() {
return bottomLeft;
}
public void setBottomLeft(Point bottomLeft) {
this.bottomLeft = bottomLeft;
}
public Point getTopRight() {
return topRight;
}
public void setTopRight(Point topRight) {
this.topRight = topRight;
}
public boolean isOverlapping(Rectangle other) {
// one rectangle is to the top of the other
if (this.topRight.getY() < other.bottomLeft.getY() || this.bottomLeft.getY() > other.topRight.getY()) {
return false;
}
// one rectangle is to the left of the other
if (this.topRight.getX() < other.bottomLeft.getX() || this.bottomLeft.getX() > other.topRight.getX()) {
return false;
}
return true;
}
}

25
algorithms/src/test/java/com/baeldung/algorithms/insertionsort/InsertionSortUnitTest.java Normal file
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@ -0,0 +1,25 @@
package com.baeldung.algorithms.insertionsort;
import com.baeldung.algorithms.insertionsort.InsertionSort;
import org.junit.Test;
import static org.junit.Assert.assertArrayEquals;
public class InsertionSortUnitTest {
@Test
public void givenUnsortedArray_whenInsertionSortImperative_thenSortedAsc() {
int[] input = {6, 2, 3, 4, 5, 1};
InsertionSort.insertionSortImperative(input);
int[] expected = {1, 2, 3, 4, 5, 6};
assertArrayEquals("the two arrays are not equal", expected, input);
}
@Test
public void givenUnsortedArray_whenInsertionSortRecursive_thenSortedAsc() {
int[] input = {6, 4, 5, 2, 3, 1};
InsertionSort.insertionSortRecursive(input);
int[] expected = {1, 2, 3, 4, 5, 6};
assertArrayEquals("the two arrays are not equal", expected, input);
}
}

17
algorithms/src/test/java/com/baeldung/algorithms/mergesort/MergeSortUnitTest.java Normal file
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@ -0,0 +1,17 @@
package com.baeldung.algorithms.mergesort;
import org.junit.Assert;
import org.junit.Test;
public class MergeSortUnitTest {
@Test
public void positiveTest() {
int[] actual = { 5, 1, 6, 2, 3, 4 };
int[] expected = { 1, 2, 3, 4, 5, 6 };
MergeSort.mergeSort(actual, actual.length);
Assert.assertArrayEquals(expected, actual);
}
}

17
algorithms/src/test/java/com/baeldung/algorithms/quicksort/QuickSortUnitTest.java Normal file
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@ -0,0 +1,17 @@
package com.baeldung.algorithms.quicksort;
import com.baeldung.algorithms.quicksort.QuickSort;
import org.junit.Assert;
import org.junit.Test;
public class QuickSortUnitTest {
@Test
public void givenIntegerArray_whenSortedWithQuickSort_thenGetSortedArray() {
int[] actual = { 9, 5, 1, 0, 6, 2, 3, 4, 7, 8 };
int[] expected = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
QuickSort.quickSort(actual, 0, actual.length-1);
Assert.assertArrayEquals(expected, actual);
}
}

15
algorithms/src/test/java/com/baeldung/algorithms/quicksort/ThreeWayQuickSortUnitTest.java Normal file
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@ -0,0 +1,15 @@
package com.baeldung.algorithms.quicksort;
import org.junit.Assert;
import org.junit.Test;
public class ThreeWayQuickSortUnitTest {
@Test
public void givenIntegerArray_whenSortedWithThreeWayQuickSort_thenGetSortedArray() {
int[] actual = { 3, 5, 5, 5, 3, 7, 7, 3, 5, 5, 7, 3, 3 };
int[] expected = { 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 7, 7, 7 };
ThreeWayQuickSort.threeWayQuickSort(actual, 0, actual.length-1);
Assert.assertArrayEquals(expected, actual);
}
}

42
algorithms/src/test/java/com/baeldung/algorithms/rectanglesoverlap/RectangleUnitTest.java Normal file
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@ -0,0 +1,42 @@
package com.baeldung.algorithms.rectanglesoverlap;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import org.junit.Test;
import com.baeldung.algorithms.rectanglesoverlap.Point;
import com.baeldung.algorithms.rectanglesoverlap.Rectangle;
public class RectangleUnitTest {
@Test
public void givenTwoOverlappingRectangles_whenisOverlappingCalled_shouldReturnTrue() {
Rectangle rectangle1 = new Rectangle(new Point(2, 1), new Point(4, 3));
Rectangle rectangle2 = new Rectangle(new Point(1, 1), new Point(6, 4));
assertTrue(rectangle1.isOverlapping(rectangle2));
rectangle1 = new Rectangle(new Point(-5, -2), new Point(2, 3));
rectangle2 = new Rectangle(new Point(-2, -1), new Point(5, 2));
assertTrue(rectangle1.isOverlapping(rectangle2));
rectangle1 = new Rectangle(new Point(-5, 1), new Point(2, 4));
rectangle2 = new Rectangle(new Point(-2, -2), new Point(5, 5));
assertTrue(rectangle1.isOverlapping(rectangle2));
}
@Test
public void givenTwoNonOverlappingRectangles_whenisOverlappingCalled_shouldReturnFalse() {
Rectangle rectangle1 = new Rectangle(new Point(-5, 1), new Point(-3, 4));
Rectangle rectangle2 = new Rectangle(new Point(-2, -2), new Point(5, 5));
assertFalse(rectangle1.isOverlapping(rectangle2));
rectangle1 = new Rectangle(new Point(-5, 1), new Point(3, 4));
rectangle2 = new Rectangle(new Point(-2, -2), new Point(5, -1));
assertFalse(rectangle1.isOverlapping(rectangle2));
rectangle1 = new Rectangle(new Point(-2, 1), new Point(0, 3));
rectangle2 = new Rectangle(new Point(3, 1), new Point(5, 4));
assertFalse(rectangle1.isOverlapping(rectangle2));
}
}

6
animal-sniffer-mvn-plugin/src/test/java/com/baeldung/AppTest.java → animal-sniffer-mvn-plugin/src/test/java/com/baeldung/AppUnitTest.java
View File

@ -7,7 +7,7 @@ import junit.framework.TestSuite;
/**
* Unit test for simple App.
*/
public class AppTest
public class AppUnitTest
extends TestCase
{
/**
@ -15,7 +15,7 @@ public class AppTest
*
* @param testName name of the test case
*/
public AppTest( String testName )
public AppUnitTest( String testName )
{
super( testName );
}
@ -25,7 +25,7 @@ public class AppTest
*/
public static Test suite()
{
return new TestSuite( AppTest.class );
return new TestSuite( AppUnitTest.class );
}
/**

2
apache-avro/pom.xml
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@ -6,7 +6,7 @@
<groupId>com.baeldung</groupId>
<artifactId>apache-avro</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Apache Avro</version>
<name>Apache Avro</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

2
apache-avro/src/test/java/com/baeldung/avro/util/serealization/AvroSerealizerDeSerealizerTest.java → apache-avro/src/test/java/com/baeldung/avro/util/serealization/AvroSerealizerDeSerealizerUnitTest.java
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@ -13,7 +13,7 @@ import java.util.Objects;
import static org.junit.Assert.*;
public class AvroSerealizerDeSerealizerTest {
public class AvroSerealizerDeSerealizerUnitTest {
AvroSerealizer serealizer;
AvroDeSerealizer deSerealizer;

1
apache-cxf/README.md
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@ -3,3 +3,4 @@
- [Apache CXF Support for RESTful Web Services](http://www.baeldung.com/apache-cxf-rest-api)
- [A Guide to Apache CXF with Spring](http://www.baeldung.com/apache-cxf-with-spring)
- [Introduction to Apache CXF](http://www.baeldung.com/introduction-to-apache-cxf)
- [Server-Sent Events (SSE) In JAX-RS](https://www.baeldung.com/java-ee-jax-rs-sse)

46
apache-geode/pom.xml Normal file
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@ -0,0 +1,46 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>apache-geode</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<properties>
<geode.core>1.6.0</geode.core>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.geode</groupId>
<artifactId>geode-core</artifactId>
<version>${geode.core}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>RELEASE</version>
</dependency>
</dependencies>
</project>

78
apache-geode/src/main/java/com/baeldung/geode/Customer.java Normal file
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@ -0,0 +1,78 @@
package com.baeldung.geode;
import java.io.Serializable;
import java.util.Objects;
public class Customer implements Serializable {
private static final long serialVersionUID = -7482516011038799900L;
private CustomerKey key;
private String firstName;
private String lastName;
private Integer age;
public Customer() {
}
public Customer(String firstName, String lastName, int age) {
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
}
public Customer(CustomerKey key, String firstName, String lastName, int age) {
this(firstName, lastName, age);
this.key = key;
}
// setters and getters
public static long getSerialVersionUID() {
return serialVersionUID;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Customer{" + "firstName='" + firstName + '\'' + ", lastName='" + lastName + '\'' + ", age=" + age + '}';
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
Customer customer = (Customer) o;
return Objects.equals(firstName, customer.firstName) && Objects.equals(lastName, customer.lastName) && Objects.equals(age, customer.age);
}
@Override
public int hashCode() {
return Objects.hash(firstName, lastName, age);
}
}

57
apache-geode/src/main/java/com/baeldung/geode/CustomerKey.java Normal file
View File

@ -0,0 +1,57 @@
package com.baeldung.geode;
import java.io.Serializable;
public class CustomerKey implements Serializable {
private static final long serialVersionUID = -3529253035303792458L;
private long id;
private String country;
public CustomerKey(long id) {
this.id = id;
this.country = "USA";
}
public CustomerKey(long id, String country) {
this.id = id;
this.country = country;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getCountry() {
return country;
}
public void setCountry(String country) {
this.country = country;
}
@Override
public boolean equals(Object o) {
if (this == o)
return true;
if (o == null || getClass() != o.getClass())
return false;
CustomerKey that = (CustomerKey) o;
if (id != that.id)
return false;
return country != null ? country.equals(that.country) : that.country == null;
}
@Override
public int hashCode() {
int result = (int) (id ^ (id >>> 32));
result = 31 * result + (country != null ? country.hashCode() : 0);
return result;
}
}

34
apache-geode/src/main/java/com/baeldung/geode/functions/UpperCaseNames.java Normal file
View File

@ -0,0 +1,34 @@
package com.baeldung.geode.functions;
import com.baeldung.geode.Customer;
import com.baeldung.geode.CustomerKey;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.execute.Function;
import org.apache.geode.cache.execute.FunctionContext;
import org.apache.geode.cache.execute.RegionFunctionContext;
import java.util.Map;
public class UpperCaseNames implements Function<Boolean> {
private static final long serialVersionUID = -8946294032165677602L;
@Override
public void execute(FunctionContext<Boolean> context) {
RegionFunctionContext regionContext = (RegionFunctionContext) context;
Region<CustomerKey, Customer> region = regionContext.getDataSet();
for (Map.Entry<CustomerKey, Customer> entry : region.entrySet()) {
Customer customer = entry.getValue();
customer.setFirstName(customer.getFirstName()
.toUpperCase());
}
context.getResultSender()
.lastResult(true);
}
@Override
public String getId() {
return getClass().getName();
}
}

110
apache-geode/src/test/java/com/baeldung/geode/GeodeSamplesIntegrationTest.java Normal file
View File

@ -0,0 +1,110 @@
package com.baeldung.geode;
import com.baeldung.geode.functions.UpperCaseNames;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.client.ClientCache;
import org.apache.geode.cache.client.ClientCacheFactory;
import org.apache.geode.cache.client.ClientRegionShortcut;
import org.apache.geode.cache.execute.Execution;
import org.apache.geode.cache.execute.FunctionService;
import org.apache.geode.cache.query.*;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static org.junit.Assert.assertEquals;
public class GeodeSamplesIntegrationTest {
ClientCache cache = null;
Region<String, String> region = null;
Region<Integer, Customer> queryRegion = null;
Region<CustomerKey, Customer> customerRegion = null;
@Before
public void connect() {
this.cache = new ClientCacheFactory().addPoolLocator("localhost", 10334)
.create();
this.region = this.cache.<String, String> createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY)
.create("baeldung");
this.customerRegion = this.cache.<CustomerKey, Customer> createClientRegionFactory(ClientRegionShortcut.CACHING_PROXY)
.create("baeldung-customers");
}
@After
public void cleanup() {
this.cache.close();
}
@Test
public void whenSendMessageToRegion_thenMessageSavedSuccessfully() {
this.region.put("1", "Hello");
this.region.put("2", "Baeldung");
assertEquals("Hello", region.get("1"));
assertEquals("Baeldung", region.get("2"));
}
@Test
public void whenPutMultipleValuesAtOnce_thenValuesSavedSuccessfully() {
Supplier<Stream<String>> keys = () -> Stream.of("A", "B", "C", "D", "E");
Map<String, String> values = keys.get()
.collect(Collectors.toMap(Function.identity(), String::toLowerCase));
this.region.putAll(values);
keys.get()
.forEach(k -> assertEquals(k.toLowerCase(), this.region.get(k)));
}
@Test
public void whenPutCustomKey_thenValuesSavedSuccessfully() {
CustomerKey key = new CustomerKey(123);
Customer customer = new Customer(key, "William", "Russell", 35);
Map<CustomerKey, Customer> customerInfo = new HashMap<>();
customerInfo.put(key, customer);
this.customerRegion.putAll(customerInfo);
Customer storedCustomer = this.customerRegion.get(key);
assertEquals("William", storedCustomer.getFirstName());
assertEquals("Russell", storedCustomer.getLastName());
}
@Test
public void whenFindACustomerUsingOQL_thenCorrectCustomerObject() throws NameResolutionException, TypeMismatchException, QueryInvocationTargetException, FunctionDomainException {
Map<CustomerKey, Customer> data = new HashMap<>();
data.put(new CustomerKey(1), new Customer("Gheorge", "Manuc", 36));
data.put(new CustomerKey(2), new Customer("Allan", "McDowell", 43));
this.customerRegion.putAll(data);
QueryService queryService = this.cache.getQueryService();
String query = "select * from /baeldung-customers c where c.firstName = 'Allan'";
SelectResults<Customer> queryResults = (SelectResults<Customer>) queryService.newQuery(query)
.execute();
assertEquals(1, queryResults.size());
}
@Test
public void whenExecuteUppercaseNames_thenCustomerNamesAreUppercased() {
Execution execution = FunctionService.onRegion(this.customerRegion);
execution.execute(UpperCaseNames.class.getName());
Customer customer = this.customerRegion.get(new CustomerKey(1));
assertEquals("GHEORGE", customer.getFirstName());
}
}

20
apache-shiro/pom.xml
View File

@ -3,7 +3,6 @@
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>apache-shiro</artifactId>
<version>1.0-SNAPSHOT</version>
@ -36,13 +35,11 @@
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
@ -53,26 +50,9 @@
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<apache-shiro-core-version>1.4.0</apache-shiro-core-version>
<maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
<java.version>1.8</java.version>
<log4j-version>1.2.17</log4j-version>
<slf4j-version>1.7.25</slf4j-version>
</properties>
</project>

1
asciidoctor/README.md
View File

@ -1,5 +1,4 @@
### Relevant articles
- [Introduction to Asciidoctor](http://www.baeldung.com/introduction-to-asciidoctor)
- [Generating a Book with Asciidoctor](http://www.baeldung.com/asciidoctor-book)
- [Introduction to Asciidoctor in Java](http://www.baeldung.com/asciidoctor)

7
asciidoctor/pom.xml
View File

@ -61,9 +61,10 @@
</build>
<properties>
<asciidoctor-maven-plugin.version>1.5.5</asciidoctor-maven-plugin.version>
<asciidoctorj.version>1.5.4</asciidoctorj.version>
<asciidoctorj-pdf.src.version>1.5.0-alpha.11</asciidoctorj-pdf.src.version>
<asciidoctor-maven-plugin.version>1.5.6</asciidoctor-maven-plugin.version>
<asciidoctorj.version>1.5.6</asciidoctorj.version>
<asciidoctorj-pdf.version>1.5.0-alpha.15</asciidoctorj-pdf.version>
<asciidoctorj-pdf.plugin.version>1.5.0-alpha.15</asciidoctorj-pdf.plugin.version>
</properties>

2
asciidoctor/src/test/java/com/baeldung/asciidoctor/AsciidoctorDemoTest.java → asciidoctor/src/test/java/com/baeldung/asciidoctor/AsciidoctorDemoIntegrationTest.java
View File

@ -3,7 +3,7 @@ package com.baeldung.asciidoctor;
import org.junit.Assert;
import org.junit.Test;
public class AsciidoctorDemoTest {
public class AsciidoctorDemoIntegrationTest {
@Test
public void givenString_whenConverting_thenResultingHTMLCode() {

8
asm/pom.xml
View File

@ -42,14 +42,6 @@
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<argLine>-javaagent:"C:\asm-1.0.jar"</argLine>
</configuration>
</plugin>
</plugins>
</build>

1
aws-lambda/pom.xml
View File

@ -95,7 +95,6 @@
<gson.version>2.8.2</gson.version>
<aws-java-sdk.version>1.11.241</aws-java-sdk.version>
<maven-shade-plugin.version>3.0.0</maven-shade-plugin.version>
<maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>
</properties>
</project>

21
aws/pom.xml
View File

@ -100,26 +100,6 @@
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>${maven-dependency-plugin.version}</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>test-compile</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<includeScope>test</includeScope>
<includeTypes>so,dll,dylib</includeTypes>
<outputDirectory>${project.basedir}/native-libs</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
@ -144,7 +124,6 @@
<commons-codec-version>1.10.L001</commons-codec-version>
<jets3t-version>0.9.4.0006L</jets3t-version>
<maven-shade-plugin.version>3.0.0</maven-shade-plugin.version>
<maven-dependency-plugin.version>2.10</maven-dependency-plugin.version>
</properties>
</project>

10
cas/cas-secured-app/pom.xml
View File

@ -2,12 +2,10 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>cas-secured-app</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>cas-secured-app</name>
<description>Demo project for Spring Boot</description>
<description>Demo project for CAS</description>
<parent>
<artifactId>parent-boot-1</artifactId>
@ -60,10 +58,4 @@
</plugins>
</build>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
</project>

50
cas/cas-server/pom.xml
View File

@ -2,11 +2,17 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd ">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>cas-server</artifactId>
<packaging>war</packaging>
<version>1.0</version>
<parent>
<artifactId>parent-boot-1</artifactId>
<groupId>com.baeldung</groupId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../parent-boot-1</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.apereo.cas</groupId>
@ -39,7 +45,6 @@
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${springboot.version}</version>
<configuration>
<mainClass>${mainClassName}</mainClass>
<addResources>true</addResources>
@ -74,42 +79,10 @@
</overlays>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
</plugin>
</plugins>
<finalName>cas</finalName>
</build>
<repositories>
<repository>
<id>sonatype-releases</id>
<url>http://oss.sonatype.org/content/repositories/releases/</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
<releases>
<enabled>true</enabled>
</releases>
</repository>
<repository>
<id>sonatype-snapshots</id>
<url>https://oss.sonatype.org/content/repositories/snapshots/</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
<releases>
<enabled>false</enabled>
</releases>
</repository>
<repository>
<id>shibboleth-releases</id>
<url>https://build.shibboleth.net/nexus/content/repositories/releases</url>
</repository>
</repositories>
<profiles>
<profile>
<activation>
@ -214,8 +187,7 @@
</profiles>
<properties>
<cas.version>5.3.0-SNAPSHOT</cas.version>
<springboot.version>1.5.13.RELEASE</springboot.version>
<cas.version>5.3.3</cas.version>
<!-- app.server could be -jetty, -undertow, -tomcat, or blank if you plan to provide appserver -->
<app.server>-tomcat</app.server>
@ -223,14 +195,12 @@
<isExecutable>false</isExecutable>
<manifestFileToUse>${project.build.directory}/war/work/org.apereo.cas/cas-server-webapp${app.server}/META-INF/MANIFEST.MF</manifestFileToUse>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<wrapper-maven-plugin.version>0.0.4</wrapper-maven-plugin.version>
<maven-war-plugin.version>2.6</maven-war-plugin.version>
<maven-compiler-plugin.version>3.3</maven-compiler-plugin.version>
<echo-maven-plugin.version>0.3.0</echo-maven-plugin.version>
<pgpverify-maven-plugin.version>1.1.0</pgpverify-maven-plugin.version>
</properties>
</project>
</project>

38
cdi-portable-extension/flyway-cdi/pom.xml Normal file
View File

@ -0,0 +1,38 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>flyway-cdi</artifactId>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>cdi-portable-extension</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0.SP1</version>
</dependency>
<dependency>
<groupId>org.flywaydb</groupId>
<artifactId>flyway-core</artifactId>
<version>5.1.4</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
<version>8.5.33</version>
</dependency>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>javax.annotation-api</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
</project>

74
cdi-portable-extension/flyway-cdi/src/main/java/com/baeldung/cdi/extension/FlywayExtension.java Normal file
View File

@ -0,0 +1,74 @@
package com.baeldung.cdi.extension;
import org.apache.tomcat.jdbc.pool.DataSource;
import org.flywaydb.core.Flyway;
import javax.annotation.sql.DataSourceDefinition;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.Any;
import javax.enterprise.inject.Default;
import javax.enterprise.inject.literal.InjectLiteral;
import javax.enterprise.inject.spi.*;
import javax.enterprise.util.AnnotationLiteral;
/**
* Flyway is now under CDI container like:
*
* @ApplicationScoped
* @FlywayType public class Flyway{
* @Inject setDataSource(DataSource dataSource){
* //...
* }
* }
*/
public class FlywayExtension implements Extension {
DataSourceDefinition dataSourceDefinition = null;
public void registerFlywayType(@Observes BeforeBeanDiscovery bbdEvent) {
bbdEvent.addAnnotatedType(Flyway.class, Flyway.class.getName());
}
public void detectDataSourceDefinition(@Observes @WithAnnotations(DataSourceDefinition.class) ProcessAnnotatedType<?> patEvent) {
AnnotatedType at = patEvent.getAnnotatedType();
dataSourceDefinition = at.getAnnotation(DataSourceDefinition.class);
}
public void processAnnotatedType(@Observes ProcessAnnotatedType<Flyway> patEvent) {
patEvent.configureAnnotatedType()
//Add Scope
.add(ApplicationScoped.Literal.INSTANCE)
//Add Qualifier
.add(new AnnotationLiteral<FlywayType>() {
})
//Decorate setDataSource(DataSource dataSource){} with @Inject
.filterMethods(annotatedMethod -> {
return annotatedMethod.getParameters().size() == 1 &&
annotatedMethod.getParameters().get(0).getBaseType().equals(javax.sql.DataSource.class);
})
.findFirst().get().add(InjectLiteral.INSTANCE);
}
void afterBeanDiscovery(@Observes AfterBeanDiscovery abdEvent, BeanManager bm) {
abdEvent.addBean()
.types(javax.sql.DataSource.class, DataSource.class)
.qualifiers(new AnnotationLiteral<Default>() {}, new AnnotationLiteral<Any>() {})
.scope(ApplicationScoped.class)
.name(DataSource.class.getName())
.beanClass(DataSource.class)
.createWith(creationalContext -> {
DataSource instance = new DataSource();
instance.setUrl(dataSourceDefinition.url());
instance.setDriverClassName(dataSourceDefinition.className());
return instance;
});
}
void runFlywayMigration(@Observes AfterDeploymentValidation adv, BeanManager manager) {
Flyway flyway = manager.createInstance().select(Flyway.class, new AnnotationLiteral<FlywayType>() {}).get();
flyway.migrate();
}
}

14
cdi-portable-extension/flyway-cdi/src/main/java/com/baeldung/cdi/extension/FlywayType.java Normal file
View File

@ -0,0 +1,14 @@
package com.baeldung.cdi.extension;
import javax.inject.Qualifier;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.*;
@Retention(RetentionPolicy.RUNTIME)
@Target({FIELD, METHOD, PARAMETER, TYPE})
@Qualifier
public @interface FlywayType {
}

6
cdi-portable-extension/flyway-cdi/src/main/resources/META-INF/beans.xml Normal file
View File

@ -0,0 +1,6 @@
<beans version="2.0" xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/beans_2_0.xsd"
bean-discovery-mode="annotated">
</beans>

2
cdi-portable-extension/flyway-cdi/src/main/resources/META-INF/services/javax.enterprise.inject.spi.Extension Normal file
View File

@ -0,0 +1,2 @@
com.baeldung.cdi.extension.FlywayExtension

52
cdi-portable-extension/main-app/pom.xml Normal file
View File

@ -0,0 +1,52 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>main-app</artifactId>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>cdi-portable-extension</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0.SP1</version>
</dependency>
<dependency>
<groupId>org.jboss.weld.se</groupId>
<artifactId>weld-se-core</artifactId>
<version>3.0.5.Final</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.baeldung</groupId>
<artifactId>flyway-cdi</artifactId>
<version>1.0-SNAPSHOT</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.197</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>javax.annotation</groupId>
<artifactId>javax.annotation-api</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
</project>

16
cdi-portable-extension/main-app/src/main/java/com/baeldung/cdi/extension/MainApp.java Normal file
View File

@ -0,0 +1,16 @@
package com.baeldung.cdi.extension;
import javax.annotation.sql.DataSourceDefinition;
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.se.SeContainer;
import javax.enterprise.inject.se.SeContainerInitializer;
@ApplicationScoped
@DataSourceDefinition(name = "ds", className = "org.h2.Driver", url = "jdbc:h2:mem:testdb")
public class MainApp {
public static void main(String[] args) {
SeContainerInitializer initializer = SeContainerInitializer.newInstance();
try (SeContainer container = initializer.initialize()) {
}
}
}

6
cdi-portable-extension/main-app/src/main/resources/META-INF/beans.xml Normal file
View File

@ -0,0 +1,6 @@
<beans version="2.0" xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/beans_2_0.xsd"
bean-discovery-mode="annotated">
</beans>

4
cdi-portable-extension/main-app/src/main/resources/db/migration/V1__Create_person_table.sql Normal file
View File

@ -0,0 +1,4 @@
create table PERSON (
ID int not null,
NAME varchar(100) not null
);

3
cdi-portable-extension/main-app/src/main/resources/db/migration/V2__Add_people.sql Normal file
View File

@ -0,0 +1,3 @@
insert into PERSON (ID, NAME) values (1, 'Axel');
insert into PERSON (ID, NAME) values (2, 'Mr. Foo');
insert into PERSON (ID, NAME) values (3, 'Ms. Bar');

30
cdi-portable-extension/pom.xml Normal file
View File

@ -0,0 +1,30 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>cdi-portable-extension</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<modules>
<module>main-app</module>
<module>flyway-cdi</module>
</modules>
<dependencies>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>2.0.SP1</version>
</dependency>
</dependencies>
</project>

21
checker-plugin/pom.xml
View File

@ -41,27 +41,6 @@
<build>
<plugins>
<plugin>
<!-- This plugin will set properties values using dependency information -->
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<goals>
<!--
Goal that sets a property pointing to the artifact file for each project dependency.
For each dependency (direct and transitive) a project property will be set which
follows the:
groupId:artifactId:type:[classifier]
form and contains the path to the resolved artifact. -->
<goal>properties</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>

3
core-java-8/README.md
View File

@ -29,3 +29,6 @@
- [Java 8 Unsigned Arithmetic Support](http://www.baeldung.com/java-unsigned-arithmetic)
- [Generalized Target-Type Inference in Java](http://www.baeldung.com/java-generalized-target-type-inference)
- [Overriding System Time for Testing in Java](http://www.baeldung.com/java-override-system-time)
- [Set the Time Zone of a Date in Java](https://www.baeldung.com/java-set-date-time-zone)
- [An Overview of Regular Expressions Performance in Java](https://www.baeldung.com/java-regex-performance)
- [Java Primitives versus Objects](https://www.baeldung.com/java-primitives-vs-objects)

17
core-java-8/pom.xml
View File

@ -116,23 +116,6 @@
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/libs</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>

112
core-java-8/src/test/java/com/baeldung/internationalization/DateTimeFormatterUnitTest.java
View File

@ -3,11 +3,15 @@ package com.baeldung.internationalization;
import org.junit.Assert;
import org.junit.Test;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.time.format.FormatStyle;
import java.time.temporal.ChronoUnit;
import java.util.Locale;
import java.util.TimeZone;
@ -43,4 +47,112 @@ public class DateTimeFormatterUnitTest {
Assert.assertEquals("Monday, January 1, 2018 10:15:50 AM PST", formattedDateTime);
Assert.assertEquals("lundi 1 janvier 2018 10 h 15 PST", frFormattedDateTime);
}
@Test
public void shouldPrintFormattedDate() {
String europeanDatePattern = "dd.MM.yyyy";
DateTimeFormatter europeanDateFormatter = DateTimeFormatter.ofPattern(europeanDatePattern);
LocalDate summerDay = LocalDate.of(2016, 7, 31);
Assert.assertEquals("31.07.2016", europeanDateFormatter.format(summerDay));
}
@Test
public void shouldPrintFormattedTime24() {
String timeColonPattern = "HH:mm:ss";
DateTimeFormatter timeColonFormatter = DateTimeFormatter.ofPattern(timeColonPattern);
LocalTime colonTime = LocalTime.of(17, 35, 50);
Assert.assertEquals("17:35:50", timeColonFormatter.format(colonTime));
}
@Test
public void shouldPrintFormattedTimeWithMillis() {
String timeColonPattern = "HH:mm:ss SSS";
DateTimeFormatter timeColonFormatter = DateTimeFormatter.ofPattern(timeColonPattern);
LocalTime colonTime = LocalTime.of(17, 35, 50).plus(329, ChronoUnit.MILLIS);
Assert.assertEquals("17:35:50 329", timeColonFormatter.format(colonTime));
}
@Test
public void shouldPrintFormattedTimePM() {
String timeColonPattern = "hh:mm:ss a";
DateTimeFormatter timeColonFormatter = DateTimeFormatter.ofPattern(timeColonPattern);
LocalTime colonTime = LocalTime.of(17, 35, 50);
Assert.assertEquals("05:35:50 PM", timeColonFormatter.format(colonTime));
}
@Test
public void shouldPrintFormattedUTCRelatedZonedDateTime() {
String newYorkDateTimePattern = "dd.MM.yyyy HH:mm z";
DateTimeFormatter newYorkDateFormatter = DateTimeFormatter.ofPattern(newYorkDateTimePattern);
LocalDateTime summerDay = LocalDateTime.of(2016, 7, 31, 14, 15);
Assert.assertEquals("31.07.2016 14:15 UTC-04:00", newYorkDateFormatter.format(ZonedDateTime.of(summerDay, ZoneId.of("UTC-4"))));
}
@Test
public void shouldPrintFormattedNewYorkZonedDateTime() {
String newYorkDateTimePattern = "dd.MM.yyyy HH:mm z";
DateTimeFormatter newYorkDateFormatter = DateTimeFormatter.ofPattern(newYorkDateTimePattern);
LocalDateTime summerDay = LocalDateTime.of(2016, 7, 31, 14, 15);
Assert.assertEquals("31.07.2016 14:15 EDT", newYorkDateFormatter.format(ZonedDateTime.of(summerDay, ZoneId.of("America/New_York"))));
}
@Test
public void shouldPrintStyledDate() {
LocalDate anotherSummerDay = LocalDate.of(2016, 8, 23);
Assert.assertEquals("Tuesday, August 23, 2016", DateTimeFormatter.ofLocalizedDate(FormatStyle.FULL).format(anotherSummerDay));
Assert.assertEquals("August 23, 2016", DateTimeFormatter.ofLocalizedDate(FormatStyle.LONG).format(anotherSummerDay));
Assert.assertEquals("Aug 23, 2016", DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).format(anotherSummerDay));
Assert.assertEquals("8/23/16", DateTimeFormatter.ofLocalizedDate(FormatStyle.SHORT).format(anotherSummerDay));
}
@Test
public void shouldPrintStyledDateTime() {
LocalDateTime anotherSummerDay = LocalDateTime.of(2016, 8, 23, 13, 12, 45);
Assert.assertEquals("Tuesday, August 23, 2016 1:12:45 PM EET", DateTimeFormatter.ofLocalizedDateTime(FormatStyle.FULL).withZone(ZoneId.of("Europe/Helsinki")).format(anotherSummerDay));
Assert.assertEquals("August 23, 2016 1:12:45 PM EET", DateTimeFormatter.ofLocalizedDateTime(FormatStyle.LONG).withZone(ZoneId.of("Europe/Helsinki")).format(anotherSummerDay));
Assert.assertEquals("Aug 23, 2016 1:12:45 PM", DateTimeFormatter.ofLocalizedDateTime(FormatStyle.MEDIUM).withZone(ZoneId.of("Europe/Helsinki")).format(anotherSummerDay));
Assert.assertEquals("8/23/16 1:12 PM", DateTimeFormatter.ofLocalizedDateTime(FormatStyle.SHORT).withZone(ZoneId.of("Europe/Helsinki")).format(anotherSummerDay));
}
@Test
public void shouldPrintFormattedDateTimeWithPredefined() {
Assert.assertEquals("2018-03-09", DateTimeFormatter.ISO_LOCAL_DATE.format(LocalDate.of(2018, 3, 9)));
Assert.assertEquals("2018-03-09-03:00", DateTimeFormatter.ISO_OFFSET_DATE.format(LocalDate.of(2018, 3, 9).atStartOfDay(ZoneId.of("UTC-3"))));
Assert.assertEquals("Fri, 9 Mar 2018 00:00:00 -0300", DateTimeFormatter.RFC_1123_DATE_TIME.format(LocalDate.of(2018, 3, 9).atStartOfDay(ZoneId.of("UTC-3"))));
}
@Test
public void shouldParseDateTime() {
Assert.assertEquals(LocalDate.of(2018, 3, 12), LocalDate.from(DateTimeFormatter.ISO_LOCAL_DATE.parse("2018-03-09")).plusDays(3));
}
@Test
public void shouldParseFormatStyleFull() {
ZonedDateTime dateTime = ZonedDateTime.from(DateTimeFormatter.ofLocalizedDateTime(FormatStyle.FULL).parse("Tuesday, August 23, 2016 1:12:45 PM EET"));
Assert.assertEquals(ZonedDateTime.of(LocalDateTime.of(2016, 8, 23, 22, 12, 45), ZoneId.of("Europe/Bucharest")), dateTime.plusHours(9));
}
@Test
public void shouldParseDateWithCustomFormatter() {
DateTimeFormatter europeanDateFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy");
Assert.assertFalse(LocalDate.from(europeanDateFormatter.parse("15.08.2014")).isLeapYear());
}
@Test
public void shouldParseTimeWithCustomFormatter() {
DateTimeFormatter timeFormatter = DateTimeFormatter.ofPattern("hh:mm:ss a");
Assert.assertTrue(LocalTime.from(timeFormatter.parse("12:25:30 AM")).isBefore(LocalTime.NOON));
}
@Test
public void shouldParseZonedDateTimeWithCustomFormatter() {
DateTimeFormatter zonedFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm z");
Assert.assertEquals(7200, ZonedDateTime.from(zonedFormatter.parse("31.07.2016 14:15 GMT+02:00")).getOffset().getTotalSeconds());
}
@Test(expected = DateTimeParseException.class)
public void shouldExpectAnExceptionIfDateTimeStringNotMatchPattern() {
DateTimeFormatter zonedFormatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm z");
ZonedDateTime.from(zonedFormatter.parse("31.07.2016 14:15"));
}
}

31
core-java-8/src/test/java/com/baeldung/java8/Java8SortUnitTest.java
View File

@ -1,16 +1,18 @@
package com.baeldung.java8;
import com.baeldung.java8.entity.Human;
import com.google.common.collect.Lists;
import com.google.common.primitives.Ints;
import org.junit.Assert;
import org.junit.Test;
import static org.hamcrest.Matchers.equalTo;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;
import static org.hamcrest.Matchers.equalTo;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.java8.entity.Human;
import com.google.common.collect.Lists;
import com.google.common.primitives.Ints;
public class Java8SortUnitTest {
@ -111,5 +113,22 @@ public class Java8SortUnitTest {
humans.sort(Comparator.comparing(Human::getName));
Assert.assertThat(humans.get(0), equalTo(new Human("Jack", 12)));
}
@Test
public final void givenStreamNaturalOrdering_whenSortingEntitiesByName_thenCorrectlySorted() {
final List<String> letters = Lists.newArrayList("B", "A", "C");
final List<String> sortedLetters = letters.stream().sorted().collect(Collectors.toList());
Assert.assertThat(sortedLetters.get(0), equalTo("A"));
}
@Test
public final void givenStreamCustomOrdering_whenSortingEntitiesByName_thenCorrectlySorted() {
final List<Human> humans = Lists.newArrayList(new Human("Sarah", 10), new Human("Jack", 12));
final Comparator<Human> nameComparator = (h1, h2) -> h1.getName().compareTo(h2.getName());
final List<Human> sortedHumans = humans.stream().sorted(nameComparator).collect(Collectors.toList());
Assert.assertThat(sortedHumans.get(0), equalTo(new Human("Jack", 12)));
}
}

41
core-java-8/src/test/java/com/baeldung/stream/conditional/StreamForEachIfElseUnitTest.java Normal file
View File

@ -0,0 +1,41 @@
package com.baeldung.stream.conditional;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Stream;
import org.junit.Assert;
import org.junit.Test;
public class StreamForEachIfElseUnitTest {
@Test
public final void givenIntegerStream_whenCheckingIntegerParityWithIfElse_thenEnsureCorrectParity() {
List<Integer> ints = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
ints.stream()
.forEach(i -> {
if (i.intValue() % 2 == 0) {
Assert.assertTrue(i.intValue() + " is not even", i.intValue() % 2 == 0);
} else {
Assert.assertTrue(i.intValue() + " is not odd", i.intValue() % 2 != 0);
}
});
}
@Test
public final void givenIntegerStream_whenCheckingIntegerParityWithStreamFilter_thenEnsureCorrectParity() {
List<Integer> ints = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
Stream<Integer> evenIntegers = ints.stream()
.filter(i -> i.intValue() % 2 == 0);
Stream<Integer> oddIntegers = ints.stream()
.filter(i -> i.intValue() % 2 != 0);
evenIntegers.forEach(i -> Assert.assertTrue(i.intValue() + " is not even", i.intValue() % 2 == 0));
oddIntegers.forEach(i -> Assert.assertTrue(i.intValue() + " is not odd", i.intValue() % 2 != 0));
}
}

2
core-java-9/README.md
View File

@ -24,3 +24,5 @@
- [Optional orElse Optional](http://www.baeldung.com/java-optional-or-else-optional)
- [Java 9 java.lang.Module API](http://www.baeldung.com/java-9-module-api)
- [Iterate Through a Range of Dates in Java](https://www.baeldung.com/java-iterate-date-range)
- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
- [Java 9 Platform Logging API](https://www.baeldung.com/java-9-logging-api)

15
core-java-9/logging.sh Executable file
View File

@ -0,0 +1,15 @@
# compile logging module
# javac --module-path mods -d mods/com.baeldung.logging src/modules/com.baeldung.logging/module-info.java src/modules/com.baeldung.logging/com/baeldung/logging/*.java
# compile logging slf4j module
javac --module-path mods -d mods/com.baeldung.logging.slf4j src/modules/com.baeldung.logging.slf4j/module-info.java src/modules/com.baeldung.logging.slf4j/com/baeldung/logging/slf4j/*.java
# compile logging main app module
javac --module-path mods -d mods/com.baeldung.logging.app src/modules/com.baeldung.logging.app/module-info.java src/modules/com.baeldung.logging.app/com/baeldung/logging/app/*.java
# run logging main app
# java --module-path mods -m com.baeldung.logging.app/com.baeldung.logging.app.MainApp
# run looging main app using logback
java --module-path mods -Dlogback.configurationFile=mods/logback.xml -m com.baeldung.logging.app/com.baeldung.logging.app.MainApp

16
core-java-9/mods/logback.xml Normal file
View File

@ -0,0 +1,16 @@
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<pattern>
%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} -- %msg%n
</pattern>
</encoder>
</appender>
<root>
<appender-ref ref="STDOUT"/>
</root>
</configuration>

13
core-java-9/src/modules/com.baeldung.logging.app/com/baeldung/logging/app/MainApp.java Normal file
View File

@ -0,0 +1,13 @@
package com.baeldung.logging.app;
import static java.lang.System.Logger.*;
public class MainApp {
private static System.Logger LOGGER = System.getLogger("MainApp");
public static void main(String[] args) {
LOGGER.log(Level.ERROR, "error test");
LOGGER.log(Level.INFO, "info test");
}
}

2
core-java-9/src/modules/com.baeldung.logging.app/module-info.java Normal file
View File

@ -0,0 +1,2 @@
module com.baeldung.logging.app {
}

99
core-java-9/src/modules/com.baeldung.logging.slf4j/com/baeldung/logging/slf4j/Slf4jLogger.java Normal file
View File

@ -0,0 +1,99 @@
package com.baeldung.logging.slf4j;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ResourceBundle;
public class Slf4jLogger implements System.Logger {
private final String name;
private final Logger logger;
public Slf4jLogger(String name) {
this.name = name;
logger = LoggerFactory.getLogger(name);
}
@Override
public String getName() {
return name;
}
@Override
public boolean isLoggable(Level level) {
switch (level) {
case OFF:
return false;
case TRACE:
return logger.isTraceEnabled();
case DEBUG:
return logger.isDebugEnabled();
case INFO:
return logger.isInfoEnabled();
case WARNING:
return logger.isWarnEnabled();
case ERROR:
return logger.isErrorEnabled();
case ALL:
default:
return true;
}
}
@Override
public void log(Level level, ResourceBundle bundle, String msg, Throwable thrown) {
if (!isLoggable(level)) {
return;
}
switch (level) {
case TRACE:
logger.trace(msg, thrown);
break;
case DEBUG:
logger.debug(msg, thrown);
break;
case INFO:
logger.info(msg, thrown);
break;
case WARNING:
logger.warn(msg, thrown);
break;
case ERROR:
logger.error(msg, thrown);
break;
case ALL:
default:
logger.info(msg, thrown);
}
}
@Override
public void log(Level level, ResourceBundle bundle, String format, Object... params) {
if (!isLoggable(level)) {
return;
}
switch (level) {
case TRACE:
logger.trace(format, params);
break;
case DEBUG:
logger.debug(format, params);
break;
case INFO:
logger.info(format, params);
break;
case WARNING:
logger.warn(format, params);
break;
case ERROR:
logger.error(format, params);
break;
case ALL:
default:
logger.info(format, params);
}
}
}

8
core-java-9/src/modules/com.baeldung.logging.slf4j/com/baeldung/logging/slf4j/Slf4jLoggerFinder.java Normal file
View File

@ -0,0 +1,8 @@
package com.baeldung.logging.slf4j;
public class Slf4jLoggerFinder extends System.LoggerFinder {
@Override
public System.Logger getLogger(String name, Module module) {
return new Slf4jLogger(name);
}
}

6
core-java-9/src/modules/com.baeldung.logging.slf4j/module-info.java Normal file
View File

@ -0,0 +1,6 @@
module com.baeldung.logging.slf4j {
requires org.slf4j;
provides java.lang.System.LoggerFinder
with com.baeldung.logging.slf4j.Slf4jLoggerFinder;
exports com.baeldung.logging.slf4j;
}

27
core-java-9/src/modules/com.baeldung.logging/com/baeldung/logging/ConsoleLogger.java Normal file
View File

@ -0,0 +1,27 @@
package com.baeldung.logging;
import java.text.MessageFormat;
import java.util.ResourceBundle;
public class ConsoleLogger implements System.Logger {
@Override
public String getName() {
return "ConsoleLogger";
}
@Override
public boolean isLoggable(Level level) {
return true;
}
@Override
public void log(Level level, ResourceBundle bundle, String msg, Throwable thrown) {
System.out.printf("ConsoleLogger [%s]: %s - %s%n", level, msg, thrown);
}
@Override
public void log(Level level, ResourceBundle bundle, String format, Object... params) {
System.out.printf("ConsoleLogger [%s]: %s%n", level, MessageFormat.format(format, params));
}
}

9
core-java-9/src/modules/com.baeldung.logging/com/baeldung/logging/CustomLoggerFinder.java Normal file
View File

@ -0,0 +1,9 @@
package com.baeldung.logging;
public class CustomLoggerFinder extends System.LoggerFinder {
@Override
public System.Logger getLogger(String name, Module module) {
return new ConsoleLogger();
}
}

5
core-java-9/src/modules/com.baeldung.logging/module-info.java Normal file
View File

@ -0,0 +1,5 @@
module com.baeldung.logging {
provides java.lang.System.LoggerFinder
with com.baeldung.logging.CustomLoggerFinder;
exports com.baeldung.logging;
}

9
core-java-collections/README.md
View File

@ -43,3 +43,12 @@
- [An Introduction to Java.util.Hashtable Class](http://www.baeldung.com/java-hash-table)
- [Copy a List to Another List in Java](http://www.baeldung.com/java-copy-list-to-another)
- [Finding Max/Min of a List or Collection](http://www.baeldung.com/java-collection-min-max)
- [Java Null-Safe Streams from Collections](https://www.baeldung.com/java-null-safe-streams-from-collections)
- [Remove All Occurrences of a Specific Value from a List](https://www.baeldung.com/java-remove-value-from-list)
- [Thread Safe LIFO Data Structure Implementations](https://www.baeldung.com/java-lifo-thread-safe)
- [Collections.emptyList() vs. New List Instance](https://www.baeldung.com/java-collections-emptylist-new-list)
- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
- [Differences Between Collection.clear() and Collection.removeAll()](https://www.baeldung.com/java-collection-clear-vs-removeall)
- [Performance of contains() in a HashSet vs ArrayList](https://www.baeldung.com/java-hashset-arraylist-contains-performance)
- [Get the Key for a Value from a Java Map](https://www.baeldung.com/java-map-key-from-value)
- [Time Complexity of Java Collections](https://www.baeldung.com/java-collections-complexity)

11
core-java-collections/pom.xml
View File

@ -63,6 +63,17 @@
<artifactId>jmh-generator-annprocess</artifactId>
<version>${openjdk.jmh.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-exec</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>one.util</groupId>
<artifactId>streamex</artifactId>
<version>0.6.5</version>
</dependency>
</dependencies>

39
core-java-collections/src/main/java/com/baeldung/combiningcollections/CombiningArrays.java Normal file
View File

@ -0,0 +1,39 @@
package com.baeldung.combiningcollections;
import java.util.Arrays;
import java.util.stream.Stream;
import org.apache.commons.lang3.ArrayUtils;
import com.google.common.collect.ObjectArrays;
public class CombiningArrays {
public static Object[] usingNativeJava(Object[] first, Object[] second) {
Object[] combined = new Object[first.length + second.length];
System.arraycopy(first, 0, combined, 0, first.length);
System.arraycopy(second, 0, combined, first.length, second.length);
return combined;
}
public static Object[] usingJava8ObjectStream(Object[] first, Object[] second) {
Object[] combined = Stream.concat(Arrays.stream(first), Arrays.stream(second)).toArray();
return combined;
}
public static Object[] usingJava8FlatMaps(Object[] first, Object[] second) {
Object[] combined = Stream.of(first, second).flatMap(Stream::of).toArray(String[]::new);
return combined;
}
public static Object[] usingApacheCommons(Object[] first, Object[] second) {
Object[] combined = ArrayUtils.addAll(first, second);
return combined;
}
public static Object[] usingGuava(Object[] first, Object[] second) {
Object [] combined = ObjectArrays.concat(first, second, Object.class);
return combined;
}
}

46
core-java-collections/src/main/java/com/baeldung/combiningcollections/CombiningLists.java Normal file
View File

@ -0,0 +1,46 @@
package com.baeldung.combiningcollections;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.commons.collections4.ListUtils;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
public class CombiningLists {
public static List<Object> usingNativeJava(List<Object> first, List<Object> second) {
List<Object> combined = new ArrayList<>();
combined.addAll(first);
combined.addAll(second);
return combined;
}
public static List<Object> usingJava8ObjectStream(List<Object> first, List<Object> second) {
List<Object> combined = Stream.concat(first.stream(), second.stream()).collect(Collectors.toList());
return combined;
}
public static List<Object> usingJava8FlatMaps(List<Object> first, List<Object> second) {
List<Object> combined = Stream.of(first, second).flatMap(Collection::stream).collect(Collectors.toList());
return combined;
}
public static List<Object> usingApacheCommons(List<Object> first, List<Object> second) {
List<Object> combined = ListUtils.union(first, second);
return combined;
}
public static List<Object> usingGuava(List<Object> first, List<Object> second) {
Iterable<Object> combinedIterables = Iterables.unmodifiableIterable(
Iterables.concat(first, second));
List<Object> combined = Lists.newArrayList(combinedIterables);
return combined;
}
}

47
core-java-collections/src/main/java/com/baeldung/combiningcollections/CombiningMaps.java Normal file
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@ -0,0 +1,47 @@
package com.baeldung.combiningcollections;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.commons.exec.util.MapUtils;
import com.google.common.collect.ImmutableMap;
public class CombiningMaps {
public static Map<String, String> usingPlainJava(Map<String, String> first, Map<String, String> second) {
Map<String, String> combined = new HashMap<>();
combined.putAll(first);
combined.putAll(second);
return combined;
}
public static Map<String, String> usingJava8ForEach(Map<String, String> first, Map<String, String> second) {
second.forEach((key, value) -> first.merge(key, value, String::concat));
return first;
}
public static Map<String, String> usingJava8FlatMaps(Map<String, String> first, Map<String, String> second) {
Map<String, String> combined = Stream.of(first, second).map(Map::entrySet).flatMap(Collection::stream)
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, String::concat));
return combined;
}
public static Map<String, String> usingApacheCommons(Map<String, String> first, Map<String, String> second) {
Map<String, String> combined = MapUtils.merge(first, second);
return combined;
}
public static Map<String, String> usingGuava(Map<String, String> first, Map<String, String> second) {
Map<String, String> combined = ImmutableMap.<String, String>builder()
.putAll(first)
.putAll(second)
.build();
return combined;
}
}

42
core-java-collections/src/main/java/com/baeldung/combiningcollections/CombiningSets.java Normal file
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@ -0,0 +1,42 @@
package com.baeldung.combiningcollections;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.apache.commons.collections4.SetUtils;
import com.google.common.collect.Sets;
public class CombiningSets {
public static Set<Object> usingNativeJava(Set<Object> first, Set<Object> second) {
Set<Object> combined = new HashSet<>();
combined.addAll(first);
combined.addAll(second);
return combined;
}
public static Set<Object> usingJava8ObjectStream(Set<Object> first, Set<Object> second) {
Set<Object> combined = Stream.concat(first.stream(), second.stream()).collect(Collectors.toSet());
return combined;
}
public static Set<Object> usingJava8FlatMaps(Set<Object> first, Set<Object> second) {
Set<Object> combined = Stream.of(first, second).flatMap(Collection::stream).collect(Collectors.toSet());
return combined;
}
public static Set<Object> usingApacheCommons(Set<Object> first, Set<Object> second) {
Set<Object> combined = SetUtils.union(first, second);
return combined;
}
public static Set<Object> usingGuava(Set<Object> first, Set<Object> second) {
Set<Object> combined = Sets.union(first, second);
return combined;
}
}

52
core-java-collections/src/main/java/com/baeldung/convertcollectiontoarraylist/Foo.java Normal file
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@ -0,0 +1,52 @@
package com.baeldung.convertcollectiontoarraylist;
/**
* This POJO is the element type of our collection. It has a deepCopy() method.
*
* @author chris
*/
public class Foo {
private int id;
private String name;
private Foo parent;
public Foo() {
}
public Foo(int id, String name, Foo parent) {
this.id = id;
this.name = name;
this.parent = parent;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Foo getParent() {
return parent;
}
public void setParent(Foo parent) {
this.parent = parent;
}
public Foo deepCopy() {
return new Foo(
this.id, this.name, this.parent != null ? this.parent.deepCopy() : null);
}
}

44
core-java-collections/src/main/java/com/baeldung/java/map/MapUtil.java Normal file
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/**
*
*/
package com.baeldung.java.map;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import java.util.stream.Stream;
/**
* @author swpraman
*
*/
public class MapUtil {
public static <K, V> Stream<K> keys(Map<K, V> map, V value) {
return map.entrySet()
.stream()
.filter(entry -> value.equals(entry.getValue()))
.map(Map.Entry::getKey);
}
public static <K, V> Set<K> getKeys(Map<K, V> map, V value) {
Set<K> keys = new HashSet<>();
for (Entry<K, V> entry : map.entrySet()) {
if (entry.getValue().equals(value)) {
keys.add(entry.getKey());
}
}
return keys;
}
public static <K, V> K getKey(Map<K, V> map, V value) {
for (Entry<K, V> entry : map.entrySet()) {
if (entry.getValue().equals(value)) {
return entry.getKey();
}
}
return null;
}
}

105
core-java-collections/src/main/java/com/baeldung/map/java_8/MergeMaps.java Normal file
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@ -0,0 +1,105 @@
package com.baeldung.map.java_8;
import com.baeldung.sort.Employee;
import one.util.streamex.EntryStream;
import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class MergeMaps {
private static Map<String, Employee> map1 = new HashMap<>();
private static Map<String, Employee> map2 = new HashMap<>();
public static void main(String[] args) {
initialize();
mergeFunction();
streamConcat();
streamOf();
streamEx();
streamMerge();
}
private static void streamMerge() {
Map<String, Employee> map3 = map2.entrySet()
.stream()
.collect(
Collectors.toMap(
Map.Entry::getKey,
Map.Entry::getValue,
(v1, v2) -> new Employee(v1.getId(), v2.getName()),
() -> new HashMap<>(map1)
)
);
System.out.println(map3);
}
private static void streamEx() {
Map<String, Employee> map3 = EntryStream.of(map1)
.append(EntryStream.of(map2))
.toMap((e1, e2) -> e1);
System.out.println(map3);
}
private static void streamOf() {
Map<String, Employee> map3 = Stream.of(map1, map2)
.flatMap(map -> map.entrySet().stream())
.collect(
Collectors.toMap(
Map.Entry::getKey,
Map.Entry::getValue,
(v1, v2) -> new Employee(v1.getId(), v2.getName())
)
);
map3.entrySet().forEach(System.out::println);
}
private static void streamConcat() {
Map<String, Employee> result = Stream.concat(map1.entrySet().stream(), map2.entrySet().stream()).collect(Collectors.toMap(
Map.Entry::getKey,
Map.Entry::getValue,
(value1, value2) -> new Employee(value2.getId(), value1.getName())
));
result.entrySet().forEach(System.out::println);
}
private static void mergeFunction() {
Map<String, Employee> map3 = new HashMap<>(map1);
map2.forEach(
(key, value) -> map3.merge(key, value, (v1, v2) ->
new Employee(v1.getId(), v2.getName()))
);
map3.entrySet().forEach(System.out::println);
}
private static void initialize() {
Employee employee1 = new Employee(1L, "Henry");
map1.put(employee1.getName(), employee1);
Employee employee2 = new Employee(22L, "Annie");
map1.put(employee2.getName(), employee2);
Employee employee3 = new Employee(8L, "John");
map1.put(employee3.getName(), employee3);
Employee employee4 = new Employee(2L, "George");
map2.put(employee4.getName(), employee4);
Employee employee5 = new Employee(3L, "Henry");
map2.put(employee5.getName(), employee5);
}
}

96
core-java-collections/src/main/java/com/baeldung/map/util/MapMax.java Normal file
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@ -0,0 +1,96 @@
package com.baeldung.map.util;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
public class MapMax {
public <K, V extends Comparable<V>> V maxUsingIteration(Map<K, V> map) {
Map.Entry<K, V> maxEntry = null;
for (Map.Entry<K, V> entry : map.entrySet()) {
if (maxEntry == null || entry.getValue()
.compareTo(maxEntry.getValue()) > 0) {
maxEntry = entry;
}
}
return maxEntry.getValue();
}
public <K, V extends Comparable<V>> V maxUsingCollectionsMax(Map<K, V> map) {
Entry<K, V> maxEntry = Collections.max(map.entrySet(), new Comparator<Entry<K, V>>() {
public int compare(Entry<K, V> e1, Entry<K, V> e2) {
return e1.getValue()
.compareTo(e2.getValue());
}
});
return maxEntry.getValue();
}
public <K, V extends Comparable<V>> V maxUsingCollectionsMaxAndLambda(Map<K, V> map) {
Entry<K, V> maxEntry = Collections.max(map.entrySet(), (Entry<K, V> e1, Entry<K, V> e2) -> e1.getValue()
.compareTo(e2.getValue()));
return maxEntry.getValue();
}
public <K, V extends Comparable<V>> V maxUsingCollectionsMaxAndMethodReference(Map<K, V> map) {
Entry<K, V> maxEntry = Collections.max(map.entrySet(), Comparator.comparing(Map.Entry::getValue));
return maxEntry.getValue();
}
public <K, V extends Comparable<V>> V maxUsingStreamAndLambda(Map<K, V> map) {
Optional<Entry<K, V>> maxEntry = map.entrySet()
.stream()
.max((Entry<K, V> e1, Entry<K, V> e2) -> e1.getValue()
.compareTo(e2.getValue()));
return maxEntry.get()
.getValue();
}
public <K, V extends Comparable<V>> V maxUsingStreamAndMethodReference(Map<K, V> map) {
Optional<Entry<K, V>> maxEntry = map.entrySet()
.stream()
.max(Comparator.comparing(Map.Entry::getValue));
return maxEntry.get()
.getValue();
}
public static void main(String[] args) {
Map<Integer, Integer> map = new HashMap<Integer, Integer>();
map.put(1, 3);
map.put(2, 4);
map.put(3, 5);
map.put(4, 6);
map.put(5, 7);
MapMax mapMax = new MapMax();
System.out.println(mapMax.maxUsingIteration(map));
System.out.println(mapMax.maxUsingCollectionsMax(map));
System.out.println(mapMax.maxUsingCollectionsMaxAndLambda(map));
System.out.println(mapMax.maxUsingCollectionsMaxAndMethodReference(map));
System.out.println(mapMax.maxUsingStreamAndLambda(map));
System.out.println(mapMax.maxUsingStreamAndMethodReference(map));
}
}

8
core-java-collections/src/main/java/com/baeldung/performance/Employee.java
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@ -44,4 +44,12 @@ public class Employee {
result = 31 * result + name.hashCode();
return result;
}
@Override
public String toString() {
return "Employee{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
}

60
core-java-collections/src/main/java/com/baeldung/sort/Employee.java Normal file
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@ -0,0 +1,60 @@
package com.baeldung.sort;
public class Employee implements Comparable<Employee> {
private Long id;
private String name;
public Employee(Long id, String name) {
this.name = name;
this.id = id;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Employee employee = (Employee) o;
if (!id.equals(employee.id)) return false;
return name.equals(employee.name);
}
@Override
public int hashCode() {
int result = id.hashCode();
result = 31 * result + name.hashCode();
return result;
}
@Override
public String toString() {
return "Employee{" +
"id=" + id +
", name='" + name + '\'' +
'}';
}
@Override
public int compareTo(Employee employee) {
return (int)(this.id - employee.getId());
}
}

104
core-java-collections/src/main/java/com/baeldung/sort/SortHashMap.java Normal file
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@ -0,0 +1,104 @@
package com.baeldung.sort;
import com.google.common.base.Functions;
import com.google.common.collect.ImmutableSortedMap;
import com.google.common.collect.Lists;
import com.google.common.collect.Ordering;
import java.util.*;
import java.util.stream.Collectors;
public class SortHashMap {
private static Map<String, Employee> map = new HashMap<>();
public static void main(String[] args) {
initialize();
treeMapSortByKey();
arrayListSortByValue();
arrayListSortByKey();
sortStream();
sortGuava();
addDuplicates();
treeSetByKey();
treeSetByValue();
}
private static void sortGuava() {
final Ordering naturalOrdering =
Ordering.natural().onResultOf(Functions.forMap(map, null));
System.out.println(ImmutableSortedMap.copyOf(map, naturalOrdering));
}
private static void sortStream() {
map.entrySet().stream()
.sorted(Map.Entry.<String, Employee>comparingByKey().reversed())
.forEach(System.out::println);
Map<String, Employee> result = map.entrySet().stream()
.sorted(Map.Entry.comparingByValue())
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue,
(oldValue, newValue) -> oldValue, LinkedHashMap::new));
result.entrySet().forEach(System.out::println);
}
private static void treeSetByValue() {
SortedSet<Employee> values = new TreeSet<>(map.values());
System.out.println(values);
}
private static void treeSetByKey() {
SortedSet<String> keysSet = new TreeSet<>(map.keySet());
System.out.println(keysSet);
}
private static void treeMapSortByKey() {
TreeMap<String, Employee> sorted = new TreeMap<>(map);
sorted.putAll(map);
sorted.entrySet().forEach(System.out::println);
}
private static void arrayListSortByValue() {
List<Employee> employeeById = new ArrayList<>(map.values());
Collections.sort(employeeById);
System.out.println(employeeById);
}
private static void arrayListSortByKey() {
List<String> employeeByKey = new ArrayList<>(map.keySet());
Collections.sort(employeeByKey);
System.out.println(employeeByKey);
}
private static void initialize() {
Employee employee1 = new Employee(1L, "Mher");
map.put(employee1.getName(), employee1);
Employee employee2 = new Employee(22L, "Annie");
map.put(employee2.getName(), employee2);
Employee employee3 = new Employee(8L, "John");
map.put(employee3.getName(), employee3);
Employee employee4 = new Employee(2L, "George");
map.put(employee4.getName(), employee4);
}
private static void addDuplicates() {
Employee employee5 = new Employee(1L, "Mher");
map.put(employee5.getName(), employee5);
Employee employee6 = new Employee(22L, "Annie");
map.put(employee6.getName(), employee6);
}
}

40
core-java-collections/src/test/java/com/baeldung/collection/ClearVsRemoveAllUnitTest.java Normal file
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@ -0,0 +1,40 @@
package com.baeldung.collection;
import org.junit.jupiter.api.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* Unit tests demonstrating differences between ArrayList#clear() and ArrayList#removeAll()
*/
class ClearVsRemoveAllUnitTest {
/*
* Tests
*/
@Test
void givenArrayListWithElements_whenClear_thenListBecomesEmpty() {
Collection<Integer> collection = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5));
collection.clear();
assertTrue(collection.isEmpty());
}
@Test
void givenTwoArrayListsWithCommonElements_whenRemoveAll_thenFirstListMissElementsFromSecondList() {
Collection<Integer> firstCollection = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5));
Collection<Integer> secondCollection = new ArrayList<>(Arrays.asList(3, 4, 5, 6, 7));
firstCollection.removeAll(secondCollection);
assertEquals(Arrays.asList(1, 2), firstCollection);
assertEquals(Arrays.asList(3, 4, 5, 6, 7), secondCollection);
}
}

52
core-java-collections/src/test/java/com/baeldung/combiningcollections/CombiningArraysUnitTest.java Normal file
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@ -0,0 +1,52 @@
package com.baeldung.combiningcollections;
import static org.junit.Assert.*;
import org.junit.Test;
public class CombiningArraysUnitTest {
private static final String first[] = {
"One",
"Two",
"Three"
};
private static final String second[] = {
"Four",
"Five",
"Six"
};
private static final String expected[] = {
"One",
"Two",
"Three",
"Four",
"Five",
"Six"
};
@Test
public void givenTwoArrays_whenUsingNativeJava_thenArraysCombined() {
assertArrayEquals(expected, CombiningArrays.usingNativeJava(first, second));
}
@Test
public void givenTwoArrays_whenUsingObjectStreams_thenArraysCombined() {
assertArrayEquals(expected, CombiningArrays.usingJava8ObjectStream(first, second));
}
@Test
public void givenTwoArrays_whenUsingFlatMaps_thenArraysCombined() {
assertArrayEquals(expected, CombiningArrays.usingJava8FlatMaps(first, second));
}
@Test
public void givenTwoArrays_whenUsingApacheCommons_thenArraysCombined() {
assertArrayEquals(expected, CombiningArrays.usingApacheCommons(first, second));
}
@Test
public void givenTwoArrays_whenUsingGuava_thenArraysCombined() {
assertArrayEquals(expected, CombiningArrays.usingGuava(first, second));
}
}

57
core-java-collections/src/test/java/com/baeldung/combiningcollections/CombiningListsUnitTest.java Normal file
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@ -0,0 +1,57 @@
package com.baeldung.combiningcollections;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import java.util.Arrays;
import java.util.List;
import org.junit.Test;
public class CombiningListsUnitTest {
private static final List<Object> first = Arrays.asList(new Object[]{
"One",
"Two",
"Three"
});
private static final List<Object> second = Arrays.asList(new Object[]{
"Four",
"Five",
"Six"
});
private static final List<Object> expected = Arrays.asList(new Object[]{
"One",
"Two",
"Three",
"Four",
"Five",
"Six"
});
@Test
public void givenTwoLists_whenUsingNativeJava_thenArraysCombined() {
assertThat(CombiningLists.usingNativeJava(first, second), is(expected));
}
@Test
public void givenTwoLists_whenUsingObjectStreams_thenArraysCombined() {
assertThat(CombiningLists.usingJava8ObjectStream(first, second), is(expected));
}
@Test
public void givenTwoLists_whenUsingFlatMaps_thenArraysCombined() {
assertThat(CombiningLists.usingJava8FlatMaps(first, second), is(expected));
}
@Test
public void givenTwoLists_whenUsingApacheCommons_thenArraysCombined() {
assertThat(CombiningLists.usingApacheCommons(first, second), is(expected));
}
@Test
public void givenTwoLists_whenUsingGuava_thenArraysCombined() {
assertThat(CombiningLists.usingGuava(first, second), is(expected));
}
}

54
core-java-collections/src/test/java/com/baeldung/combiningcollections/CombiningMapsUnitTest.java Normal file
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@ -0,0 +1,54 @@
package com.baeldung.combiningcollections;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import java.util.HashMap;
import java.util.Map;
import org.junit.Test;
public class CombiningMapsUnitTest {
private static final Map<String, String> first = new HashMap<>();
private static final Map<String, String> second = new HashMap<>();
private static Map<String, String> expected = new HashMap<>();
static {
first.put("one", "first String");
first.put("two", "second String");
second.put("three", "third String");
second.put("four", "fourth String");
expected.put("one", "first String");
expected.put("two", "second String");
expected.put("three", "third String");
expected.put("four", "fourth String");
}
@Test
public void givenTwoMaps_whenUsingNativeJava_thenMapsCombined() {
assertThat(CombiningMaps.usingPlainJava(first, second), is(expected));
}
@Test
public void givenTwoMaps_whenUsingForEach_thenMapsCombined() {
assertThat(CombiningMaps.usingJava8ForEach(first, second), is(expected));
}
@Test
public void givenTwoMaps_whenUsingFlatMaps_thenMapsCombined() {
assertThat(CombiningMaps.usingJava8FlatMaps(first, second), is(expected));
}
@Test
public void givenTwoMaps_whenUsingApacheCommons_thenMapsCombined() {
assertThat(CombiningMaps.usingApacheCommons(first, second), is(expected));
}
@Test
public void givenTwoMaps_whenUsingGuava_thenMapsCombined() {
assertThat(CombiningMaps.usingGuava(first, second), is(expected));
}
}

45
core-java-collections/src/test/java/com/baeldung/combiningcollections/CombiningSetsUnitTest.java Normal file
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@ -0,0 +1,45 @@
package com.baeldung.combiningcollections;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import org.junit.Test;
public class CombiningSetsUnitTest {
private static final Set<Object> first = new HashSet<Object>(Arrays.asList(new Object[] { "One", "Two", "Three" }));
private static final Set<Object> second = new HashSet<Object>(Arrays.asList(new Object[] { "Four", "Five", "Six" }));
private static final Set<Object> expected = new HashSet<Object>(Arrays
.asList(new Object[] { "One", "Two", "Three", "Four", "Five", "Six" }));
@Test
public void givenTwoSets_whenUsingNativeJava_thenArraysCombined() {
assertThat(CombiningSets.usingNativeJava(first, second), is(expected));
}
@Test
public void givenTwoSets_whenUsingObjectStreams_thenArraysCombined() {
assertThat(CombiningSets.usingJava8ObjectStream(first, second), is(expected));
}
@Test
public void givenTwoSets_whenUsingFlatMaps_thenArraysCombined() {
assertThat(CombiningSets.usingJava8FlatMaps(first, second), is(expected));
}
@Test
public void givenTwoSets_whenUsingApacheCommons_thenArraysCombined() {
assertThat(CombiningSets.usingApacheCommons(first, second), is(expected));
}
@Test
public void givenTwoSets_whenUsingGuava_thenArraysCombined() {
assertThat(CombiningSets.usingGuava(first, second), is(expected));
}
}

148
core-java-collections/src/test/java/com/baeldung/convertcollectiontoarraylist/FooUnitTest.java Normal file
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@ -0,0 +1,148 @@
package com.baeldung.convertcollectiontoarraylist;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Comparator;
import java.util.HashSet;
import java.util.Iterator;
import static java.util.stream.Collectors.toCollection;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.*;
/**
*
* @author chris
*/
public class FooUnitTest {
private static Collection<Foo> srcCollection = new HashSet<>();
public FooUnitTest() {
}
@BeforeClass
public static void setUpClass() {
int i = 0;
Foo john = new Foo(i++, "John", null);
Foo mary = new Foo(i++, "Mary", null);
Foo sam = new Foo(i++, "Sam", john);
Foo alice = new Foo(i++, "Alice", john);
Foo buffy = new Foo(i++, "Buffy", sam);
srcCollection.add(john);
srcCollection.add(mary);
srcCollection.add(sam);
srcCollection.add(alice);
srcCollection.add(buffy);
// make sure the collection isn't sorted accidentally
assertFalse("Oops: source collection is already sorted!", isSorted(srcCollection));
}
/**
* Section 3. Using the ArrayList Constructor
*/
@Test
public void whenUsingConstructor_thenVerifyShallowCopy() {
ArrayList<Foo> newList = new ArrayList<>(srcCollection);
verifyShallowCopy(srcCollection, newList);
}
/**
* Section 4. Using the Streams API
*/
@Test
public void whenUsingStream_thenVerifyShallowCopy() {
ArrayList<Foo> newList = srcCollection.stream().collect(toCollection(ArrayList::new));
verifyShallowCopy(srcCollection, newList);
}
/**
* Section 5. Deep Copy
*/
@Test
public void whenUsingDeepCopy_thenVerifyDeepCopy() {
ArrayList<Foo> newList = srcCollection.stream()
.map(foo -> foo.deepCopy())
.collect(toCollection(ArrayList::new));
verifyDeepCopy(srcCollection, newList);
}
/**
* Section 6. Controlling the List Order
*/
@Test
public void whenUsingSortedStream_thenVerifySortOrder() {
ArrayList<Foo> newList = srcCollection.stream()
.sorted(Comparator.comparing(Foo::getName))
.collect(toCollection(ArrayList::new));
assertTrue("ArrayList is not sorted by name", isSorted(newList));
}
/**
* Verify that the contents of the two collections are the same
* @param a
* @param b
*/
private void verifyShallowCopy(Collection a, Collection b) {
assertEquals("Collections have different lengths", a.size(), b.size());
Iterator<Foo> iterA = a.iterator();
Iterator<Foo> iterB = b.iterator();
while (iterA.hasNext()) {
// use '==' to test instance identity
assertTrue("Foo instances differ!", iterA.next() == iterB.next());
}
}
/**
* Verify that the contents of the two collections are the same
* @param a
* @param b
*/
private void verifyDeepCopy(Collection a, Collection b) {
assertEquals("Collections have different lengths", a.size(), b.size());
Iterator<Foo> iterA = a.iterator();
Iterator<Foo> iterB = b.iterator();
while (iterA.hasNext()) {
Foo nextA = iterA.next();
Foo nextB = iterB.next();
// should not be same instance
assertFalse("Foo instances are the same!", nextA == nextB);
// but should have same content
assertFalse("Foo instances have different content!", fooDiff(nextA, nextB));
}
}
/**
* Return true if the contents of a and b differ. Test parent recursively
* @param a
* @param b
* @return False if the two items are the same
*/
private boolean fooDiff(Foo a, Foo b) {
if (a != null && b != null) {
return a.getId() != b.getId()
|| !a.getName().equals(b.getName())
|| fooDiff(a.getParent(), b.getParent());
}
return !(a == null && b == null);
}
/**
* @param c collection of Foo
* @return true if the collection is sorted by name
*/
private static boolean isSorted(Collection<Foo> c) {
String prevName = null;
for (Foo foo : c) {
if (prevName == null || foo.getName().compareTo(prevName) > 0) {
prevName = foo.getName();
} else {
return false;
}
}
return true;
}
}

29
core-java-collections/src/test/java/com/baeldung/java/map/KeyCheckUnitTest.java Normal file
View File

@ -0,0 +1,29 @@
package com.baeldung.java.map;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import java.util.Collections;
import java.util.Map;
import org.junit.Test;
public class KeyCheckUnitTest {
@Test
public void whenKeyIsPresent_thenContainsKeyReturnsTrue() {
Map<String, String> map = Collections.singletonMap("key", "value");
assertTrue(map.containsKey("key"));
assertFalse(map.containsKey("missing"));
}
@Test
public void whenKeyHasNullValue_thenGetStillWorks() {
Map<String, String> map = Collections.singletonMap("nothing", null);
assertTrue(map.containsKey("nothing"));
assertNull(map.get("nothing"));
}
}

104
core-java-collections/src/test/java/com/baeldung/java/map/MapUtilUnitTest.java Normal file
View File

@ -0,0 +1,104 @@
/**
*
*/
package com.baeldung.java.map;
import static org.junit.Assert.assertEquals;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.stream.Collectors;
import org.apache.commons.collections4.BidiMap;
import org.apache.commons.collections4.bidimap.DualHashBidiMap;
import org.junit.Test;
import com.google.common.collect.HashBiMap;
/**
* @author swpraman
*
*/
public class MapUtilUnitTest {
@Test
public void whenUsingImperativeWayForSingleKey_shouldReturnSingleKey() {
Map<String, String> capitalCountryMap = new HashMap<>();
capitalCountryMap.put("Tokyo", "Japan");
capitalCountryMap.put("New Delhi", "India");
assertEquals("New Delhi", MapUtil.getKey(capitalCountryMap, "India"));
}
@Test
public void whenUsingImperativeWayForAllKeys_shouldReturnAllKeys() {
Map<String, String> capitalCountryMap = new HashMap<>();
capitalCountryMap.put("Tokyo", "Japan");
capitalCountryMap.put("Berlin", "Germany");
capitalCountryMap.put("Cape Town", "South Africa");
capitalCountryMap.put("Pretoria", "South Africa");
capitalCountryMap.put("Bloemfontein", "South Africa");
assertEquals(new HashSet<String>(Arrays.asList(
new String[] {"Cape Town", "Pretoria", "Bloemfontein"})),
MapUtil.getKeys(capitalCountryMap, "South Africa"));
}
@Test
public void whenUsingFunctionalWayForSingleKey_shouldReturnSingleKey() {
Map<String, String> capitalCountryMap = new HashMap<>();
capitalCountryMap.put("Tokyo", "Japan");
capitalCountryMap.put("Berlin", "Germany");
assertEquals("Berlin", MapUtil.keys(capitalCountryMap, "Germany").findFirst().get());
}
@Test
public void whenUsingFunctionalWayForAllKeys_shouldReturnAllKeys() {
Map<String, String> capitalCountryMap = new HashMap<>();
capitalCountryMap.put("Tokyo", "Japan");
capitalCountryMap.put("Berlin", "Germany");
capitalCountryMap.put("Cape Town", "South Africa");
capitalCountryMap.put("Pretoria", "South Africa");
capitalCountryMap.put("Bloemfontein", "South Africa");
assertEquals(new HashSet<String>(Arrays.asList(
new String[] {"Cape Town", "Pretoria", "Bloemfontein"})),
MapUtil.keys(capitalCountryMap, "South Africa").collect(Collectors.toSet()));
}
@Test
public void whenUsingBidiMap_shouldReturnKey() {
BidiMap<String, String> capitalCountryMap = new DualHashBidiMap<String, String>();
capitalCountryMap.put("Berlin", "Germany");
capitalCountryMap.put("Cape Town", "South Africa");
assertEquals("Berlin", capitalCountryMap.getKey("Germany"));
}
@Test
public void whenUsingBidiMapAddDuplicateValue_shouldRemoveOldEntry() {
BidiMap<String, String> capitalCountryMap = new DualHashBidiMap<String, String>();
capitalCountryMap.put("Berlin", "Germany");
capitalCountryMap.put("Cape Town", "South Africa");
capitalCountryMap.put("Pretoria", "South Africa");
assertEquals("Pretoria", capitalCountryMap.getKey("South Africa"));
}
@Test
public void whenUsingBiMap_shouldReturnKey() {
HashBiMap<String, String> capitalCountryMap = HashBiMap.create();
capitalCountryMap.put("Berlin", "Germany");
capitalCountryMap.put("Cape Town", "South Africa");
assertEquals("Berlin", capitalCountryMap.inverse().get("Germany"));
}
@Test(expected=IllegalArgumentException.class)
public void whenUsingBiMapAddDuplicateValue_shouldThrowException() {
HashBiMap<String, String> capitalCountryMap = HashBiMap.create();
capitalCountryMap.put("Berlin", "Germany");
capitalCountryMap.put("Cape Town", "South Africa");
capitalCountryMap.put("Pretoria", "South Africa");
assertEquals("Berlin", capitalCountryMap.inverse().get("Germany"));
}
}

59
core-java-collections/src/test/java/com/baeldung/map/util/MapMaxUnitTest.java Normal file
View File

@ -0,0 +1,59 @@
package com.baeldung.map.util;
import static org.junit.Assert.assertEquals;
import java.util.HashMap;
import java.util.Map;
import org.junit.Before;
import org.junit.Test;
public class MapMaxUnitTest {
Map<Integer, Integer> map = null;
MapMax mapMax = null;
@Before
public void setupTestData() {
map = new HashMap<Integer, Integer>();
map.put(23, 12);
map.put(46, 24);
map.put(27, 38);
mapMax = new MapMax();
}
@Test
public void givenMap_whenIterated_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingIteration(map));
}
@Test
public void givenMap_whenUsingCollectionsMax_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingCollectionsMax(map));
}
@Test
public void givenMap_whenUsingCollectionsMaxAndLambda_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingCollectionsMaxAndLambda(map));
}
@Test
public void givenMap_whenUsingCollectionsMaxAndMethodReference_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingCollectionsMaxAndMethodReference(map));
}
@Test
public void givenMap_whenUsingStreamAndLambda_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingStreamAndLambda(map));
}
@Test
public void givenMap_whenUsingStreamAndMethodReference_thenReturnMaxValue() {
assertEquals(new Integer(38), mapMax.maxUsingStreamAndMethodReference (map));
}
}

20
core-java-concurrency-collections/pom.xml
View File

@ -57,26 +57,6 @@
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/libs</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<properties>

20
core-java-concurrency/pom.xml
View File

@ -57,26 +57,6 @@
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>prepare-package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/libs</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<properties>

17
core-java-concurrency/src/main/java/com/baeldung/concurrent/yield/ThreadYield.java Normal file
View File

@ -0,0 +1,17 @@
package com.baeldung.concurrent.yield;
public class ThreadYield {
public static void main(String[] args) {
Runnable r = () -> {
int counter = 0;
while (counter < 2) {
System.out.println(Thread.currentThread()
.getName());
counter++;
Thread.yield();
}
};
new Thread(r).start();
new Thread(r).start();
}
}

2
core-java-io/README.md
View File

@ -30,3 +30,5 @@
- [Download a File From an URL in Java](http://www.baeldung.com/java-download-file)
- [Create a Symbolic Link with Java](http://www.baeldung.com/java-symlink)
- [Quick Use of FilenameFilter](http://www.baeldung.com/java-filename-filter)
- [Initialize a HashMap in Java](https://www.baeldung.com/java-initialize-hashmap)
- [ Read a File into an ArrayList](https://www.baeldung.com/java-file-to-arraylist)

60
core-java-io/pom.xml
View File

@ -1,7 +1,6 @@
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>core-java-io</artifactId>
<version>0.1.0-SNAPSHOT</version>
<packaging>jar</packaging>
@ -166,36 +165,6 @@
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<excludes>
<exclude>**/*LiveTest.java</exclude>
<exclude>**/*IntegrationTest.java</exclude>
<exclude>**/*IntTest.java</exclude>
<exclude>**/*LongRunningUnitTest.java</exclude>
<exclude>**/*ManualTest.java</exclude>
</excludes>
<testFailureIgnore>true</testFailureIgnore>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot-maven-plugin.version}</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
<configuration>
<classifier>spring-boot</classifier>
<mainClass>org.baeldung.executable.ExecutableMavenJar</mainClass>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
@ -229,32 +198,6 @@
<id>integration</id>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<executions>
<execution>
<phase>integration-test</phase>
<goals>
<goal>test</goal>
</goals>
<configuration>
<excludes>
<exclude>**/*ManualTest.java</exclude>
</excludes>
<includes>
<include>**/*IntegrationTest.java</include>
<include>**/*IntTest.java</include>
</includes>
</configuration>
</execution>
</executions>
<configuration>
<systemPropertyVariables>
<test.mime>json</test.mime>
</systemPropertyVariables>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
@ -310,14 +253,11 @@
<avaitility.version>1.7.0</avaitility.version>
<!-- maven plugins -->
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven-javadoc-plugin.version>3.0.0-M1</maven-javadoc-plugin.version>
<hsqldb.version>2.4.0</hsqldb.version>
<esapi.version>2.1.0.1</esapi.version>
<jmh-generator-annprocess.version>1.19</jmh-generator-annprocess.version>
<async-http-client.version>2.4.5</async-http-client.version>
<spring-boot-maven-plugin.version>2.0.4.RELEASE</spring-boot-maven-plugin.version>
</properties>
</project>

48
core-java-io/src/main/java/com/baeldung/stream/OutputStreamExamples.java Normal file
View File

@ -0,0 +1,48 @@
package com.baeldung.stream;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
public class OutputStreamExamples {
public void fileOutputStreamByteSequence(String file, String data) throws IOException {
byte[] bytes = data.getBytes();
try (OutputStream out = new FileOutputStream(file)) {
out.write(bytes);
}
}
public void fileOutputStreamByteSubSequence(String file, String data) throws IOException {
byte[] bytes = data.getBytes();
try (OutputStream out = new FileOutputStream(file)) {
out.write(bytes, 6, 5);
}
}
public void fileOutputStreamByteSingle(String file, String data) throws IOException {
byte[] bytes = data.getBytes();
try (OutputStream out = new FileOutputStream(file)) {
out.write(bytes[6]);
}
}
public void bufferedOutputStream(String file, String... data) throws IOException {
try (BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file))) {
for (String s : data) {
out.write(s.getBytes());
out.write(" ".getBytes());
}
}
}
public void outputStreamWriter(String file, String data) throws IOException {
try (OutputStream out = new FileOutputStream(file); Writer writer = new OutputStreamWriter(out, "UTF-8")) {
writer.write(data);
}
}
}

7
core-java-io/src/main/java/com/baeldung/zip/ZipDirectory.java
View File

@ -24,6 +24,13 @@ public class ZipDirectory {
return;
}
if (fileToZip.isDirectory()) {
if (fileName.endsWith("/")) {
zipOut.putNextEntry(new ZipEntry(fileName));
zipOut.closeEntry();
} else {
zipOut.putNextEntry(new ZipEntry(fileName + "/"));
zipOut.closeEntry();
}
final File[] children = fileToZip.listFiles();
for (final File childFile : children) {
zipFile(childFile, fileName + "/" + childFile.getName(), zipOut);

21
core-java-io/src/test/java/com/baeldung/file/FileOperationsManualTest.java
View File

@ -1,6 +1,7 @@
package com.baeldung.file;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.hamcrest.CoreMatchers;
import org.hamcrest.Matchers;
import org.junit.Test;
@ -17,6 +18,7 @@ import java.net.URLConnection;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static org.junit.Assert.assertEquals;
@ -49,7 +51,7 @@ public class FileOperationsManualTest {
@Test
public void givenFileName_whenUsingJarFile_thenFileData() throws IOException {
String expectedData = "BSD License";
String expectedData = "MIT License";
Class clazz = Matchers.class;
InputStream inputStream = clazz.getResourceAsStream("/LICENSE.txt");
@ -78,7 +80,7 @@ public class FileOperationsManualTest {
ClassLoader classLoader = getClass().getClassLoader();
File file = new File(classLoader.getResource("fileTest.txt").getFile());
String data = FileUtils.readFileToString(file);
String data = FileUtils.readFileToString(file, "UTF-8");
assertEquals(expectedData, data.trim());
}
@ -101,12 +103,11 @@ public class FileOperationsManualTest {
Path path = Paths.get(getClass().getClassLoader().getResource("fileTest.txt").toURI());
StringBuilder data = new StringBuilder();
Stream<String> lines = Files.lines(path);
lines.forEach(line -> data.append(line).append("\n"));
String data = lines.collect(Collectors.joining("\n"));
lines.close();
assertEquals(expectedData, data.toString().trim());
assertEquals(expectedData, data.trim());
}
private String readFromInputStream(InputStream inputStream) throws IOException {
@ -120,4 +121,14 @@ public class FileOperationsManualTest {
return resultStringBuilder.toString();
}
@Test
public void givenFileName_whenUsingIOUtils_thenFileData() throws IOException {
String expectedData = "This is a content of the file";
FileInputStream fis = new FileInputStream("src/test/resources/fileToRead.txt");
String data = IOUtils.toString(fis, "UTF-8");
assertEquals(expectedData, data.trim());
}
}

76
core-java-io/src/test/java/com/baeldung/stream/OutputStreamExamplesTest.java Normal file
View File

@ -0,0 +1,76 @@
package com.baeldung.stream;
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.io.IOException;
import org.junit.Before;
import org.junit.Test;
public class OutputStreamExamplesTest {
StringBuilder filePath = new StringBuilder();
@Before
public void init() {
filePath.append("src");
filePath.append(File.separator);
filePath.append("test");
filePath.append(File.separator);
filePath.append("resources");
filePath.append(File.separator);
filePath.append("output_file.txt");
}
@Test
public void givenOutputStream_whenWriteSingleByteCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.fileOutputStreamByteSingle(filePath.toString(), "Hello World!");
assertTrue(file.exists());
file.delete();
}
@Test
public void givenOutputStream_whenWriteByteSequenceCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.fileOutputStreamByteSequence(filePath.toString(), "Hello World!");
assertTrue(file.exists());
file.delete();
}
@Test
public void givenOutputStream_whenWriteByteSubSequenceCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.fileOutputStreamByteSubSequence(filePath.toString(), "Hello World!");
assertTrue(file.exists());
file.delete();
}
@Test
public void givenBufferedOutputStream_whenCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.bufferedOutputStream(filePath.toString(), "Hello", "World!");
assertTrue(file.exists());
file.delete();
}
@Test
public void givenOutputStreamWriter_whenCalled_thenOutputCreated() throws IOException {
final File file = new File(filePath.toString());
OutputStreamExamples examples = new OutputStreamExamples();
examples.outputStreamWriter(filePath.toString(), "Hello World!");
assertTrue(file.exists());
file.delete();
}
}

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