Merge branch 'master' into thombergs-patch-4
This commit is contained in:
commit
544e7b2d22
|
@ -14,7 +14,7 @@ Java and Spring Tutorials
|
||||||
================
|
================
|
||||||
|
|
||||||
This project is **a collection of small and focused tutorials** - each covering a single and well defined area of development in the Java ecosystem.
|
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.
|
A strong focus of these is, of course, the Spring Framework - Spring, Spring Boot and Spring Security.
|
||||||
In additional to Spring, the following technologies are in focus: `core Java`, `Jackson`, `HttpClient`, `Guava`.
|
In additional to Spring, the following technologies are in focus: `core Java`, `Jackson`, `HttpClient`, `Guava`.
|
||||||
|
|
||||||
|
|
||||||
|
|
|
@ -1,3 +1,3 @@
|
||||||
### Relevant articles
|
## Relevant articles:
|
||||||
|
|
||||||
- [Introduction to Akka HTTP](https://www.baeldung.com/akka-http)
|
- [Introduction to Akka HTTP](https://www.baeldung.com/akka-http)
|
||||||
|
|
|
@ -13,3 +13,4 @@
|
||||||
- [Find the Middle Element of a Linked List](http://www.baeldung.com/java-linked-list-middle-element)
|
- [Find the Middle Element of a Linked List](http://www.baeldung.com/java-linked-list-middle-element)
|
||||||
- [Calculate Factorial in Java](https://www.baeldung.com/java-calculate-factorial)
|
- [Calculate Factorial in Java](https://www.baeldung.com/java-calculate-factorial)
|
||||||
- [Find Substrings That Are Palindromes in Java](https://www.baeldung.com/java-palindrome-substrings)
|
- [Find Substrings That Are Palindromes in Java](https://www.baeldung.com/java-palindrome-substrings)
|
||||||
|
- [Find the Longest Substring without Repeating Characters](https://www.baeldung.com/java-longest-substring-without-repeated-characters)
|
||||||
|
|
|
@ -0,0 +1,123 @@
|
||||||
|
package com.baeldung.algorithms.permutation;
|
||||||
|
|
||||||
|
import java.util.Arrays;
|
||||||
|
import java.util.Collections;
|
||||||
|
|
||||||
|
public class Permutation {
|
||||||
|
|
||||||
|
public static <T> void printAllRecursive(T[] elements, char delimiter) {
|
||||||
|
printAllRecursive(elements.length, elements, delimiter);
|
||||||
|
}
|
||||||
|
|
||||||
|
public static <T> void printAllRecursive(int n, T[] elements, char delimiter) {
|
||||||
|
|
||||||
|
if(n == 1) {
|
||||||
|
printArray(elements, delimiter);
|
||||||
|
} else {
|
||||||
|
for(int i = 0; i < n-1; i++) {
|
||||||
|
printAllRecursive(n - 1, elements, delimiter);
|
||||||
|
if(n % 2 == 0) {
|
||||||
|
swap(elements, i, n-1);
|
||||||
|
} else {
|
||||||
|
swap(elements, 0, n-1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
printAllRecursive(n - 1, elements, delimiter);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static <T> void printAllIterative(int n, T[] elements, char delimiter) {
|
||||||
|
|
||||||
|
int[] indexes = new int[n];
|
||||||
|
for (int i = 0; i < n; i++) {
|
||||||
|
indexes[i] = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
printArray(elements, delimiter);
|
||||||
|
|
||||||
|
int i = 0;
|
||||||
|
while (i < n) {
|
||||||
|
if (indexes[i] < i) {
|
||||||
|
swap(elements, i % 2 == 0 ? 0: indexes[i], i);
|
||||||
|
printArray(elements, delimiter);
|
||||||
|
indexes[i]++;
|
||||||
|
i = 0;
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
indexes[i] = 0;
|
||||||
|
i++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static <T extends Comparable<T>> void printAllOrdered(T[] elements, char delimiter) {
|
||||||
|
|
||||||
|
Arrays.sort(elements);
|
||||||
|
boolean hasNext = true;
|
||||||
|
|
||||||
|
while(hasNext) {
|
||||||
|
printArray(elements, delimiter);
|
||||||
|
int k = 0, l = 0;
|
||||||
|
hasNext = false;
|
||||||
|
for (int i = elements.length - 1; i > 0; i--) {
|
||||||
|
if (elements[i].compareTo(elements[i - 1]) > 0) {
|
||||||
|
k = i - 1;
|
||||||
|
hasNext = true;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
for (int i = elements.length - 1; i > k; i--) {
|
||||||
|
if (elements[i].compareTo(elements[k]) > 0) {
|
||||||
|
l = i;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
swap(elements, k, l);
|
||||||
|
Collections.reverse(Arrays.asList(elements).subList(k + 1, elements.length));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
public static <T> void printRandom(T[] elements, char delimiter) {
|
||||||
|
|
||||||
|
Collections.shuffle(Arrays.asList(elements));
|
||||||
|
printArray(elements, delimiter);
|
||||||
|
}
|
||||||
|
|
||||||
|
private static <T> void swap(T[] elements, int a, int b) {
|
||||||
|
|
||||||
|
T tmp = elements[a];
|
||||||
|
elements[a] = elements[b];
|
||||||
|
elements[b] = tmp;
|
||||||
|
}
|
||||||
|
|
||||||
|
private static <T> void printArray(T[] elements, char delimiter) {
|
||||||
|
|
||||||
|
String delimiterSpace = delimiter + " ";
|
||||||
|
for(int i = 0; i < elements.length; i++) {
|
||||||
|
System.out.print(elements[i] + delimiterSpace);
|
||||||
|
}
|
||||||
|
System.out.print('\n');
|
||||||
|
}
|
||||||
|
|
||||||
|
public static void main(String[] argv) {
|
||||||
|
|
||||||
|
Integer[] elements = {1,2,3,4};
|
||||||
|
|
||||||
|
System.out.println("Rec:");
|
||||||
|
printAllRecursive(elements, ';');
|
||||||
|
|
||||||
|
System.out.println("Iter:");
|
||||||
|
printAllIterative(elements.length, elements, ';');
|
||||||
|
|
||||||
|
System.out.println("Orderes:");
|
||||||
|
printAllOrdered(elements, ';');
|
||||||
|
|
||||||
|
System.out.println("Random:");
|
||||||
|
printRandom(elements, ';');
|
||||||
|
|
||||||
|
System.out.println("Random:");
|
||||||
|
printRandom(elements, ';');
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,16 @@
|
||||||
|
package com.baeldung.algorithms.twopointertechnique;
|
||||||
|
|
||||||
|
public class LinkedListFindMiddle {
|
||||||
|
|
||||||
|
public <T> T findMiddle(MyNode<T> head) {
|
||||||
|
MyNode<T> slowPointer = head;
|
||||||
|
MyNode<T> fastPointer = head;
|
||||||
|
|
||||||
|
while (fastPointer.next != null && fastPointer.next.next != null) {
|
||||||
|
fastPointer = fastPointer.next.next;
|
||||||
|
slowPointer = slowPointer.next;
|
||||||
|
}
|
||||||
|
return slowPointer.data;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,20 @@
|
||||||
|
package com.baeldung.algorithms.twopointertechnique;
|
||||||
|
|
||||||
|
public class MyNode<E> {
|
||||||
|
MyNode<E> next;
|
||||||
|
E data;
|
||||||
|
|
||||||
|
public MyNode(E value) {
|
||||||
|
data = value;
|
||||||
|
next = null;
|
||||||
|
}
|
||||||
|
|
||||||
|
public MyNode(E value, MyNode<E> n) {
|
||||||
|
data = value;
|
||||||
|
next = n;
|
||||||
|
}
|
||||||
|
|
||||||
|
public void setNext(MyNode<E> n) {
|
||||||
|
next = n;
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,22 @@
|
||||||
|
package com.baeldung.algorithms.twopointertechnique;
|
||||||
|
|
||||||
|
public class RotateArray {
|
||||||
|
|
||||||
|
public void rotate(int[] input, int step) {
|
||||||
|
step %= input.length;
|
||||||
|
reverse(input, 0, input.length - 1);
|
||||||
|
reverse(input, 0, step - 1);
|
||||||
|
reverse(input, step, input.length - 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
private void reverse(int[] input, int start, int end) {
|
||||||
|
while (start < end) {
|
||||||
|
int temp = input[start];
|
||||||
|
input[start] = input[end];
|
||||||
|
input[end] = temp;
|
||||||
|
start++;
|
||||||
|
end--;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,38 @@
|
||||||
|
package com.baeldung.algorithms.twopointertechnique;
|
||||||
|
|
||||||
|
public class TwoSum {
|
||||||
|
|
||||||
|
public boolean twoSum(int[] input, int targetValue) {
|
||||||
|
|
||||||
|
int pointerOne = 0;
|
||||||
|
int pointerTwo = input.length - 1;
|
||||||
|
|
||||||
|
while (pointerOne < pointerTwo) {
|
||||||
|
int sum = input[pointerOne] + input[pointerTwo];
|
||||||
|
|
||||||
|
if (sum == targetValue) {
|
||||||
|
return true;
|
||||||
|
} else if (sum < targetValue) {
|
||||||
|
pointerOne++;
|
||||||
|
} else {
|
||||||
|
pointerTwo--;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
public boolean twoSumSlow(int[] input, int targetValue) {
|
||||||
|
|
||||||
|
for (int i = 0; i < input.length; i++) {
|
||||||
|
for (int j = 1; j < input.length; j++) {
|
||||||
|
if (input[i] + input[j] == targetValue) {
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,37 @@
|
||||||
|
package com.baeldung.algorithms.twopointertechnique;
|
||||||
|
|
||||||
|
import static org.assertj.core.api.Assertions.assertThat;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class LinkedListFindMiddleUnitTest {
|
||||||
|
|
||||||
|
LinkedListFindMiddle linkedListFindMiddle = new LinkedListFindMiddle();
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenLinkedListOfMyNodes_whenLinkedListFindMiddle_thenCorrect() {
|
||||||
|
|
||||||
|
MyNode<String> head = createNodesList(8);
|
||||||
|
|
||||||
|
assertThat(linkedListFindMiddle.findMiddle(head)).isEqualTo("4");
|
||||||
|
|
||||||
|
head = createNodesList(9);
|
||||||
|
|
||||||
|
assertThat(linkedListFindMiddle.findMiddle(head)).isEqualTo("5");
|
||||||
|
}
|
||||||
|
|
||||||
|
private static MyNode<String> createNodesList(int n) {
|
||||||
|
|
||||||
|
MyNode<String> head = new MyNode<String>("1");
|
||||||
|
MyNode<String> current = head;
|
||||||
|
|
||||||
|
for (int i = 2; i <= n; i++) {
|
||||||
|
MyNode<String> newNode = new MyNode<String>(String.valueOf(i));
|
||||||
|
current.setNext(newNode);
|
||||||
|
current = newNode;
|
||||||
|
}
|
||||||
|
|
||||||
|
return head;
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,26 @@
|
||||||
|
package com.baeldung.algorithms.twopointertechnique;
|
||||||
|
|
||||||
|
import static org.assertj.core.api.Assertions.assertThat;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class RotateArrayUnitTest {
|
||||||
|
|
||||||
|
private RotateArray rotateArray = new RotateArray();
|
||||||
|
|
||||||
|
private int[] inputArray;
|
||||||
|
|
||||||
|
private int step;
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenAnArrayOfIntegers_whenRotateKsteps_thenCorrect() {
|
||||||
|
|
||||||
|
inputArray = new int[] { 1, 2, 3, 4, 5, 6, 7 };
|
||||||
|
step = 4;
|
||||||
|
|
||||||
|
rotateArray.rotate(inputArray, step);
|
||||||
|
|
||||||
|
assertThat(inputArray).containsExactly(new int[] { 4, 5, 6, 7, 1, 2, 3 });
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,56 @@
|
||||||
|
package com.baeldung.algorithms.twopointertechnique;
|
||||||
|
|
||||||
|
import static org.junit.Assert.assertFalse;
|
||||||
|
import static org.junit.Assert.assertTrue;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class TwoSumUnitTest {
|
||||||
|
|
||||||
|
private TwoSum twoSum = new TwoSum();
|
||||||
|
|
||||||
|
private int[] sortedArray;
|
||||||
|
|
||||||
|
private int targetValue;
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenASortedArrayOfIntegers_whenTwoSumSlow_thenPairExists() {
|
||||||
|
|
||||||
|
sortedArray = new int[] { 0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9 };
|
||||||
|
|
||||||
|
targetValue = 12;
|
||||||
|
|
||||||
|
assertTrue(twoSum.twoSumSlow(sortedArray, targetValue));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenASortedArrayOfIntegers_whenTwoSumSlow_thenPairDoesNotExists() {
|
||||||
|
|
||||||
|
sortedArray = new int[] { 0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9 };
|
||||||
|
|
||||||
|
targetValue = 20;
|
||||||
|
|
||||||
|
assertFalse(twoSum.twoSumSlow(sortedArray, targetValue));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenASortedArrayOfIntegers_whenTwoSum_thenPairExists() {
|
||||||
|
|
||||||
|
sortedArray = new int[] { 0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9 };
|
||||||
|
|
||||||
|
targetValue = 12;
|
||||||
|
|
||||||
|
assertTrue(twoSum.twoSum(sortedArray, targetValue));
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenASortedArrayOfIntegers_whenTwoSum_thenPairDoesNotExists() {
|
||||||
|
|
||||||
|
sortedArray = new int[] { 0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9 };
|
||||||
|
|
||||||
|
targetValue = 20;
|
||||||
|
|
||||||
|
assertFalse(twoSum.twoSum(sortedArray, targetValue));
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -15,16 +15,76 @@
|
||||||
</parent>
|
</parent>
|
||||||
|
|
||||||
<dependencies>
|
<dependencies>
|
||||||
<!-- https://mvnrepository.com/artifact/org.apache.spark/spark-core_2.10 -->
|
|
||||||
<dependency>
|
<dependency>
|
||||||
<groupId>org.apache.spark</groupId>
|
<groupId>org.apache.spark</groupId>
|
||||||
<artifactId>spark-core_2.10</artifactId>
|
<artifactId>spark-core_2.11</artifactId>
|
||||||
<version>${org.apache.spark.spark-core.version}</version>
|
<version>${org.apache.spark.spark-core.version}</version>
|
||||||
|
<scope>provided</scope>
|
||||||
</dependency>
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.apache.spark</groupId>
|
||||||
|
<artifactId>spark-sql_2.11</artifactId>
|
||||||
|
<version>${org.apache.spark.spark-sql.version}</version>
|
||||||
|
<scope>provided</scope>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.apache.spark</groupId>
|
||||||
|
<artifactId>spark-streaming_2.11</artifactId>
|
||||||
|
<version>${org.apache.spark.spark-streaming.version}</version>
|
||||||
|
<scope>provided</scope>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.apache.spark</groupId>
|
||||||
|
<artifactId>spark-streaming-kafka-0-10_2.11</artifactId>
|
||||||
|
<version>${org.apache.spark.spark-streaming-kafka.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>com.datastax.spark</groupId>
|
||||||
|
<artifactId>spark-cassandra-connector_2.11</artifactId>
|
||||||
|
<version>${com.datastax.spark.spark-cassandra-connector.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>com.datastax.spark</groupId>
|
||||||
|
<artifactId>spark-cassandra-connector-java_2.11</artifactId>
|
||||||
|
<version>${com.datastax.spark.spark-cassandra-connector-java.version}</version>
|
||||||
|
</dependency>
|
||||||
</dependencies>
|
</dependencies>
|
||||||
|
<build>
|
||||||
|
<plugins>
|
||||||
|
<plugin>
|
||||||
|
<groupId>org.apache.maven.plugins</groupId>
|
||||||
|
<artifactId>maven-compiler-plugin</artifactId>
|
||||||
|
<version>3.2</version>
|
||||||
|
<configuration>
|
||||||
|
<source>1.8</source>
|
||||||
|
<target>1.8</target>
|
||||||
|
</configuration>
|
||||||
|
</plugin>
|
||||||
|
<plugin>
|
||||||
|
<artifactId>maven-assembly-plugin</artifactId>
|
||||||
|
<executions>
|
||||||
|
<execution>
|
||||||
|
<phase>package</phase>
|
||||||
|
<goals>
|
||||||
|
<goal>single</goal>
|
||||||
|
</goals>
|
||||||
|
</execution>
|
||||||
|
</executions>
|
||||||
|
<configuration>
|
||||||
|
<descriptorRefs>
|
||||||
|
<descriptorRef>jar-with-dependencies</descriptorRef>
|
||||||
|
</descriptorRefs>
|
||||||
|
</configuration>
|
||||||
|
</plugin>
|
||||||
|
</plugins>
|
||||||
|
</build>
|
||||||
<properties>
|
<properties>
|
||||||
<org.apache.spark.spark-core.version>2.2.0</org.apache.spark.spark-core.version>
|
<org.apache.spark.spark-core.version>2.3.0</org.apache.spark.spark-core.version>
|
||||||
|
<org.apache.spark.spark-sql.version>2.3.0</org.apache.spark.spark-sql.version>
|
||||||
|
<org.apache.spark.spark-streaming.version>2.3.0</org.apache.spark.spark-streaming.version>
|
||||||
|
<org.apache.spark.spark-streaming-kafka.version>2.3.0</org.apache.spark.spark-streaming-kafka.version>
|
||||||
|
<com.datastax.spark.spark-cassandra-connector.version>2.3.0</com.datastax.spark.spark-cassandra-connector.version>
|
||||||
|
<com.datastax.spark.spark-cassandra-connector-java.version>1.5.2</com.datastax.spark.spark-cassandra-connector-java.version>
|
||||||
</properties>
|
</properties>
|
||||||
|
|
||||||
</project>
|
</project>
|
||||||
|
|
|
@ -0,0 +1,25 @@
|
||||||
|
package com.baeldung.data.pipeline;
|
||||||
|
|
||||||
|
import java.io.Serializable;
|
||||||
|
|
||||||
|
public class Word implements Serializable {
|
||||||
|
private static final long serialVersionUID = 1L;
|
||||||
|
private String word;
|
||||||
|
private int count;
|
||||||
|
Word(String word, int count) {
|
||||||
|
this.word = word;
|
||||||
|
this.count = count;
|
||||||
|
}
|
||||||
|
public String getWord() {
|
||||||
|
return word;
|
||||||
|
}
|
||||||
|
public void setWord(String word) {
|
||||||
|
this.word = word;
|
||||||
|
}
|
||||||
|
public int getCount() {
|
||||||
|
return count;
|
||||||
|
}
|
||||||
|
public void setCount(int count) {
|
||||||
|
this.count = count;
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,116 @@
|
||||||
|
package com.baeldung.data.pipeline;
|
||||||
|
|
||||||
|
import static com.datastax.spark.connector.japi.CassandraJavaUtil.javaFunctions;
|
||||||
|
import static com.datastax.spark.connector.japi.CassandraJavaUtil.mapToRow;
|
||||||
|
|
||||||
|
import java.util.Arrays;
|
||||||
|
import java.util.Collection;
|
||||||
|
import java.util.HashMap;
|
||||||
|
import java.util.Iterator;
|
||||||
|
import java.util.List;
|
||||||
|
import java.util.Map;
|
||||||
|
|
||||||
|
import org.apache.kafka.clients.consumer.ConsumerRecord;
|
||||||
|
import org.apache.kafka.common.serialization.StringDeserializer;
|
||||||
|
import org.apache.log4j.Level;
|
||||||
|
import org.apache.log4j.Logger;
|
||||||
|
import org.apache.spark.SparkConf;
|
||||||
|
import org.apache.spark.api.java.JavaPairRDD;
|
||||||
|
import org.apache.spark.api.java.JavaRDD;
|
||||||
|
import org.apache.spark.api.java.function.FlatMapFunction;
|
||||||
|
import org.apache.spark.api.java.function.Function;
|
||||||
|
import org.apache.spark.api.java.function.Function2;
|
||||||
|
import org.apache.spark.api.java.function.PairFunction;
|
||||||
|
import org.apache.spark.api.java.function.VoidFunction;
|
||||||
|
import org.apache.spark.streaming.Durations;
|
||||||
|
import org.apache.spark.streaming.api.java.JavaDStream;
|
||||||
|
import org.apache.spark.streaming.api.java.JavaInputDStream;
|
||||||
|
import org.apache.spark.streaming.api.java.JavaPairDStream;
|
||||||
|
import org.apache.spark.streaming.api.java.JavaStreamingContext;
|
||||||
|
import org.apache.spark.streaming.kafka010.ConsumerStrategies;
|
||||||
|
import org.apache.spark.streaming.kafka010.KafkaUtils;
|
||||||
|
import org.apache.spark.streaming.kafka010.LocationStrategies;
|
||||||
|
|
||||||
|
import scala.Tuple2;
|
||||||
|
|
||||||
|
public class WordCountingApp {
|
||||||
|
|
||||||
|
@SuppressWarnings("serial")
|
||||||
|
public static void main(String[] args) throws InterruptedException {
|
||||||
|
Logger.getLogger("org")
|
||||||
|
.setLevel(Level.OFF);
|
||||||
|
Logger.getLogger("akka")
|
||||||
|
.setLevel(Level.OFF);
|
||||||
|
|
||||||
|
Map<String, Object> kafkaParams = new HashMap<>();
|
||||||
|
kafkaParams.put("bootstrap.servers", "localhost:9092");
|
||||||
|
kafkaParams.put("key.deserializer", StringDeserializer.class);
|
||||||
|
kafkaParams.put("value.deserializer", StringDeserializer.class);
|
||||||
|
kafkaParams.put("group.id", "use_a_separate_group_id_for_each_stream");
|
||||||
|
kafkaParams.put("auto.offset.reset", "latest");
|
||||||
|
kafkaParams.put("enable.auto.commit", false);
|
||||||
|
|
||||||
|
Collection<String> topics = Arrays.asList("messages");
|
||||||
|
|
||||||
|
SparkConf sparkConf = new SparkConf();
|
||||||
|
sparkConf.setMaster("local[2]");
|
||||||
|
sparkConf.setAppName("WordCountingApp");
|
||||||
|
sparkConf.set("spark.cassandra.connection.host", "127.0.0.1");
|
||||||
|
|
||||||
|
JavaStreamingContext streamingContext = new JavaStreamingContext(sparkConf, Durations.seconds(1));
|
||||||
|
|
||||||
|
JavaInputDStream<ConsumerRecord<String, String>> messages = KafkaUtils.createDirectStream(streamingContext, LocationStrategies.PreferConsistent(), ConsumerStrategies.<String, String> Subscribe(topics, kafkaParams));
|
||||||
|
|
||||||
|
JavaPairDStream<String, String> results = messages.mapToPair(new PairFunction<ConsumerRecord<String, String>, String, String>() {
|
||||||
|
@Override
|
||||||
|
public Tuple2<String, String> call(ConsumerRecord<String, String> record) {
|
||||||
|
return new Tuple2<>(record.key(), record.value());
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
JavaDStream<String> lines = results.map(new Function<Tuple2<String, String>, String>() {
|
||||||
|
@Override
|
||||||
|
public String call(Tuple2<String, String> tuple2) {
|
||||||
|
return tuple2._2();
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
JavaDStream<String> words = lines.flatMap(new FlatMapFunction<String, String>() {
|
||||||
|
@Override
|
||||||
|
public Iterator<String> call(String x) {
|
||||||
|
return Arrays.asList(x.split("\\s+"))
|
||||||
|
.iterator();
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
JavaPairDStream<String, Integer> wordCounts = words.mapToPair(new PairFunction<String, String, Integer>() {
|
||||||
|
@Override
|
||||||
|
public Tuple2<String, Integer> call(String s) {
|
||||||
|
return new Tuple2<>(s, 1);
|
||||||
|
}
|
||||||
|
})
|
||||||
|
.reduceByKey(new Function2<Integer, Integer, Integer>() {
|
||||||
|
@Override
|
||||||
|
public Integer call(Integer i1, Integer i2) {
|
||||||
|
return i1 + i2;
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
wordCounts.foreachRDD(new VoidFunction<JavaPairRDD<String, Integer>>() {
|
||||||
|
@Override
|
||||||
|
public void call(JavaPairRDD<String, Integer> javaRdd) throws Exception {
|
||||||
|
Map<String, Integer> wordCountMap = javaRdd.collectAsMap();
|
||||||
|
for (String key : wordCountMap.keySet()) {
|
||||||
|
List<Word> words = Arrays.asList(new Word(key, wordCountMap.get(key)));
|
||||||
|
JavaRDD<Word> rdd = streamingContext.sparkContext()
|
||||||
|
.parallelize(words);
|
||||||
|
javaFunctions(rdd).writerBuilder("vocabulary", "words", mapToRow(Word.class))
|
||||||
|
.saveToCassandra();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
streamingContext.start();
|
||||||
|
streamingContext.awaitTermination();
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,140 @@
|
||||||
|
package com.baeldung.data.pipeline;
|
||||||
|
|
||||||
|
import static com.datastax.spark.connector.japi.CassandraJavaUtil.javaFunctions;
|
||||||
|
import static com.datastax.spark.connector.japi.CassandraJavaUtil.mapToRow;
|
||||||
|
|
||||||
|
import java.util.Arrays;
|
||||||
|
import java.util.Collection;
|
||||||
|
import java.util.HashMap;
|
||||||
|
import java.util.Iterator;
|
||||||
|
import java.util.List;
|
||||||
|
import java.util.Map;
|
||||||
|
|
||||||
|
import org.apache.kafka.clients.consumer.ConsumerRecord;
|
||||||
|
import org.apache.kafka.common.serialization.StringDeserializer;
|
||||||
|
import org.apache.log4j.Level;
|
||||||
|
import org.apache.log4j.Logger;
|
||||||
|
import org.apache.spark.SparkConf;
|
||||||
|
import org.apache.spark.api.java.JavaPairRDD;
|
||||||
|
import org.apache.spark.api.java.JavaRDD;
|
||||||
|
import org.apache.spark.api.java.JavaSparkContext;
|
||||||
|
import org.apache.spark.api.java.Optional;
|
||||||
|
import org.apache.spark.api.java.function.FlatMapFunction;
|
||||||
|
import org.apache.spark.api.java.function.Function;
|
||||||
|
import org.apache.spark.api.java.function.Function2;
|
||||||
|
import org.apache.spark.api.java.function.Function3;
|
||||||
|
import org.apache.spark.api.java.function.PairFunction;
|
||||||
|
import org.apache.spark.api.java.function.VoidFunction;
|
||||||
|
import org.apache.spark.streaming.Durations;
|
||||||
|
import org.apache.spark.streaming.State;
|
||||||
|
import org.apache.spark.streaming.StateSpec;
|
||||||
|
import org.apache.spark.streaming.api.java.JavaDStream;
|
||||||
|
import org.apache.spark.streaming.api.java.JavaInputDStream;
|
||||||
|
import org.apache.spark.streaming.api.java.JavaMapWithStateDStream;
|
||||||
|
import org.apache.spark.streaming.api.java.JavaPairDStream;
|
||||||
|
import org.apache.spark.streaming.api.java.JavaStreamingContext;
|
||||||
|
import org.apache.spark.streaming.kafka010.ConsumerStrategies;
|
||||||
|
import org.apache.spark.streaming.kafka010.KafkaUtils;
|
||||||
|
import org.apache.spark.streaming.kafka010.LocationStrategies;
|
||||||
|
|
||||||
|
import scala.Tuple2;
|
||||||
|
|
||||||
|
public class WordCountingAppWithCheckpoint {
|
||||||
|
|
||||||
|
public static JavaSparkContext sparkContext;
|
||||||
|
|
||||||
|
@SuppressWarnings("serial")
|
||||||
|
public static void main(String[] args) throws InterruptedException {
|
||||||
|
|
||||||
|
Logger.getLogger("org")
|
||||||
|
.setLevel(Level.OFF);
|
||||||
|
Logger.getLogger("akka")
|
||||||
|
.setLevel(Level.OFF);
|
||||||
|
|
||||||
|
Map<String, Object> kafkaParams = new HashMap<>();
|
||||||
|
kafkaParams.put("bootstrap.servers", "localhost:9092");
|
||||||
|
kafkaParams.put("key.deserializer", StringDeserializer.class);
|
||||||
|
kafkaParams.put("value.deserializer", StringDeserializer.class);
|
||||||
|
kafkaParams.put("group.id", "use_a_separate_group_id_for_each_stream");
|
||||||
|
kafkaParams.put("auto.offset.reset", "latest");
|
||||||
|
kafkaParams.put("enable.auto.commit", false);
|
||||||
|
|
||||||
|
Collection<String> topics = Arrays.asList("messages");
|
||||||
|
|
||||||
|
SparkConf sparkConf = new SparkConf();
|
||||||
|
sparkConf.setMaster("local[2]");
|
||||||
|
sparkConf.setAppName("WordCountingAppWithCheckpoint");
|
||||||
|
sparkConf.set("spark.cassandra.connection.host", "127.0.0.1");
|
||||||
|
|
||||||
|
JavaStreamingContext streamingContext = new JavaStreamingContext(sparkConf, Durations.seconds(1));
|
||||||
|
|
||||||
|
sparkContext = streamingContext.sparkContext();
|
||||||
|
|
||||||
|
streamingContext.checkpoint("./.checkpoint");
|
||||||
|
|
||||||
|
JavaInputDStream<ConsumerRecord<String, String>> messages = KafkaUtils.createDirectStream(streamingContext, LocationStrategies.PreferConsistent(), ConsumerStrategies.<String, String> Subscribe(topics, kafkaParams));
|
||||||
|
|
||||||
|
JavaPairDStream<String, String> results = messages.mapToPair(new PairFunction<ConsumerRecord<String, String>, String, String>() {
|
||||||
|
@Override
|
||||||
|
public Tuple2<String, String> call(ConsumerRecord<String, String> record) {
|
||||||
|
return new Tuple2<>(record.key(), record.value());
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
JavaDStream<String> lines = results.map(new Function<Tuple2<String, String>, String>() {
|
||||||
|
@Override
|
||||||
|
public String call(Tuple2<String, String> tuple2) {
|
||||||
|
return tuple2._2();
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
JavaDStream<String> words = lines.flatMap(new FlatMapFunction<String, String>() {
|
||||||
|
@Override
|
||||||
|
public Iterator<String> call(String x) {
|
||||||
|
return Arrays.asList(x.split("\\s+"))
|
||||||
|
.iterator();
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
JavaPairDStream<String, Integer> wordCounts = words.mapToPair(new PairFunction<String, String, Integer>() {
|
||||||
|
@Override
|
||||||
|
public Tuple2<String, Integer> call(String s) {
|
||||||
|
return new Tuple2<>(s, 1);
|
||||||
|
}
|
||||||
|
})
|
||||||
|
.reduceByKey(new Function2<Integer, Integer, Integer>() {
|
||||||
|
@Override
|
||||||
|
public Integer call(Integer i1, Integer i2) {
|
||||||
|
return i1 + i2;
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
Function3<String, Optional<Integer>, State<Integer>, Tuple2<String, Integer>> mappingFunc = (word, one, state) -> {
|
||||||
|
int sum = one.orElse(0) + (state.exists() ? state.get() : 0);
|
||||||
|
Tuple2<String, Integer> output = new Tuple2<>(word, sum);
|
||||||
|
state.update(sum);
|
||||||
|
return output;
|
||||||
|
};
|
||||||
|
|
||||||
|
JavaPairRDD<String, Integer> initialRDD = JavaPairRDD.fromJavaRDD(sparkContext.emptyRDD());
|
||||||
|
|
||||||
|
JavaMapWithStateDStream<String, Integer, Integer, Tuple2<String, Integer>> cumulativeWordCounts = wordCounts.mapWithState(StateSpec.function(mappingFunc)
|
||||||
|
.initialState(initialRDD));
|
||||||
|
|
||||||
|
cumulativeWordCounts.foreachRDD(new VoidFunction<JavaRDD<Tuple2<String, Integer>>>() {
|
||||||
|
@Override
|
||||||
|
public void call(JavaRDD<Tuple2<String, Integer>> javaRdd) throws Exception {
|
||||||
|
List<Tuple2<String, Integer>> wordCountList = javaRdd.collect();
|
||||||
|
for (Tuple2<String, Integer> tuple : wordCountList) {
|
||||||
|
List<Word> words = Arrays.asList(new Word(tuple._1, tuple._2));
|
||||||
|
JavaRDD<Word> rdd = sparkContext.parallelize(words);
|
||||||
|
javaFunctions(rdd).writerBuilder("vocabulary", "words", mapToRow(Word.class))
|
||||||
|
.saveToCassandra();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
streamingContext.start();
|
||||||
|
streamingContext.awaitTermination();
|
||||||
|
}
|
||||||
|
}
|
|
@ -2,4 +2,4 @@
|
||||||
|
|
||||||
- [Java 11 Single File Source Code](https://www.baeldung.com/java-single-file-source-code)
|
- [Java 11 Single File Source Code](https://www.baeldung.com/java-single-file-source-code)
|
||||||
- [Java 11 Local Variable Syntax for Lambda Parameters](https://www.baeldung.com/java-var-lambda-params)
|
- [Java 11 Local Variable Syntax for Lambda Parameters](https://www.baeldung.com/java-var-lambda-params)
|
||||||
|
- [Java 11 String API Additions](https://www.baeldung.com/java-11-string-api)
|
||||||
|
|
|
@ -33,3 +33,8 @@
|
||||||
- [Java Primitives versus Objects](https://www.baeldung.com/java-primitives-vs-objects)
|
- [Java Primitives versus Objects](https://www.baeldung.com/java-primitives-vs-objects)
|
||||||
- [How to Use if/else Logic in Java 8 Streams](https://www.baeldung.com/java-8-streams-if-else-logic)
|
- [How to Use if/else Logic in Java 8 Streams](https://www.baeldung.com/java-8-streams-if-else-logic)
|
||||||
- [How to Replace Many if Statements in Java](https://www.baeldung.com/java-replace-if-statements)
|
- [How to Replace Many if Statements in Java](https://www.baeldung.com/java-replace-if-statements)
|
||||||
|
- [Java @Override Annotation](https://www.baeldung.com/java-override)
|
||||||
|
- [Java @SuppressWarnings Annotation](https://www.baeldung.com/java-suppresswarnings)
|
||||||
|
- [Java @SafeVarargs Annotation](https://www.baeldung.com/java-safevarargs)
|
||||||
|
- [Java @Deprecated Annotation](https://www.baeldung.com/java-deprecated)
|
||||||
|
- [Java 8 Predicate Chain](https://www.baeldung.com/java-predicate-chain)
|
||||||
|
|
|
@ -0,0 +1,44 @@
|
||||||
|
package com.baeldung.java9.set;
|
||||||
|
|
||||||
|
import com.google.common.collect.ImmutableSet;
|
||||||
|
|
||||||
|
import java.util.Collections;
|
||||||
|
import java.util.HashSet;
|
||||||
|
import java.util.Set;
|
||||||
|
|
||||||
|
public class UnmodifiableSet {
|
||||||
|
|
||||||
|
public static void main(String[] args) {
|
||||||
|
|
||||||
|
Set<String> set = new HashSet<>();
|
||||||
|
set.add("Canada");
|
||||||
|
set.add("USA");
|
||||||
|
|
||||||
|
coreJDK(set);
|
||||||
|
guavaOf();
|
||||||
|
copyOf(set);
|
||||||
|
java9Of();
|
||||||
|
}
|
||||||
|
|
||||||
|
private static void java9Of() {
|
||||||
|
Set<String> immutable = Set.of("Canada", "USA");
|
||||||
|
System.out.println(immutable);
|
||||||
|
}
|
||||||
|
|
||||||
|
private static void guavaOf() {
|
||||||
|
Set<String> immutable = ImmutableSet.of("Canada", "USA");
|
||||||
|
System.out.println(immutable);
|
||||||
|
}
|
||||||
|
|
||||||
|
private static void copyOf(Set<String> set) {
|
||||||
|
Set<String> immutable = ImmutableSet.copyOf(set);
|
||||||
|
set.add("Costa Rica");
|
||||||
|
System.out.println(immutable);
|
||||||
|
}
|
||||||
|
|
||||||
|
private static void coreJDK(Set<String> set) {
|
||||||
|
Set<String> unmodifiableSet = Collections.unmodifiableSet(set);
|
||||||
|
set.add("Costa Rica");
|
||||||
|
System.out.println(unmodifiableSet);
|
||||||
|
}
|
||||||
|
}
|
|
@ -1,5 +1,7 @@
|
||||||
package com.baeldung.java9;
|
package com.baeldung.java9;
|
||||||
|
|
||||||
|
import java.util.Collections;
|
||||||
|
import java.util.HashSet;
|
||||||
import java.util.Set;
|
import java.util.Set;
|
||||||
import org.junit.Test;
|
import org.junit.Test;
|
||||||
|
|
||||||
|
@ -23,4 +25,14 @@ public class SetExamplesUnitTest {
|
||||||
Set<Integer> intSet = Set.of(intArray);
|
Set<Integer> intSet = Set.of(intArray);
|
||||||
assertEquals(intSet.size(), intArray.length);
|
assertEquals(intSet.size(), intArray.length);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@Test(expected = UnsupportedOperationException.class)
|
||||||
|
public void testUnmodifiableSet() {
|
||||||
|
Set<String> set = new HashSet<>();
|
||||||
|
set.add("Canada");
|
||||||
|
set.add("USA");
|
||||||
|
|
||||||
|
Set<String> unmodifiableSet = Collections.unmodifiableSet(set);
|
||||||
|
unmodifiableSet.add("Costa Rica");
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
|
@ -13,3 +13,4 @@
|
||||||
- [How to Invert an Array in Java](http://www.baeldung.com/java-invert-array)
|
- [How to Invert an Array in Java](http://www.baeldung.com/java-invert-array)
|
||||||
- [Array Operations in Java](http://www.baeldung.com/java-common-array-operations)
|
- [Array Operations in Java](http://www.baeldung.com/java-common-array-operations)
|
||||||
- [Intersection Between two Integer Arrays](https://www.baeldung.com/java-array-intersection)
|
- [Intersection Between two Integer Arrays](https://www.baeldung.com/java-array-intersection)
|
||||||
|
- [Sorting Arrays in Java](https://www.baeldung.com/java-sorting-arrays)
|
||||||
|
|
|
@ -25,3 +25,4 @@
|
||||||
- [Ways to Iterate Over a List in Java](https://www.baeldung.com/java-iterate-list)
|
- [Ways to Iterate Over a List in Java](https://www.baeldung.com/java-iterate-list)
|
||||||
- [ClassCastException: Arrays$ArrayList cannot be cast to ArrayList](https://www.baeldung.com/java-classcastexception-arrays-arraylist)
|
- [ClassCastException: Arrays$ArrayList cannot be cast to ArrayList](https://www.baeldung.com/java-classcastexception-arrays-arraylist)
|
||||||
- [Flattening Nested Collections in Java](http://www.baeldung.com/java-flatten-nested-collections)
|
- [Flattening Nested Collections in Java](http://www.baeldung.com/java-flatten-nested-collections)
|
||||||
|
- [Intersection of Two Lists in Java](https://www.baeldung.com/java-lists-intersection)
|
||||||
|
|
|
@ -6,11 +6,11 @@ public class ArrayListOfArrayList {
|
||||||
|
|
||||||
public static void main(String args[]) {
|
public static void main(String args[]) {
|
||||||
|
|
||||||
int numVertices = 3;
|
int vertexCount = 3;
|
||||||
ArrayList<ArrayList<Integer>> graph = new ArrayList<>(numVertices);
|
ArrayList<ArrayList<Integer>> graph = new ArrayList<>(vertexCount);
|
||||||
|
|
||||||
//Initializing each element of ArrayList with ArrayList
|
//Initializing each element of ArrayList with ArrayList
|
||||||
for(int i=0; i< numVertices; i++) {
|
for(int i = 0; i< vertexCount; i++) {
|
||||||
graph.add(new ArrayList<Integer>());
|
graph.add(new ArrayList<Integer>());
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -22,12 +22,13 @@ public class ArrayListOfArrayList {
|
||||||
graph.get(2).add(1);
|
graph.get(2).add(1);
|
||||||
graph.get(0).add(2);
|
graph.get(0).add(2);
|
||||||
|
|
||||||
//Printing all the edges
|
vertexCount = graph.size();
|
||||||
for(int vertexNo=0; vertexNo<numVertices; vertexNo++) {
|
for(int i = 0; i < vertexCount; i++) {
|
||||||
int edgeCount = graph.get(vertexNo).size();
|
int edgeCount = graph.get(i).size();
|
||||||
ArrayList<Integer> listOfVertices = graph.get(vertexNo);
|
for(int j = 0; j < edgeCount; j++) {
|
||||||
for(int i=0; i<edgeCount; i++) {
|
Integer startVertex = i;
|
||||||
System.out.println("Vertex "+vertexNo+" is connected to vetex "+listOfVertices.get(i));
|
Integer endVertex = graph.get(i).get(j);
|
||||||
|
System.out.printf("Vertex %d is connected to vertex %d%n", startVertex, endVertex);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
|
@ -12,9 +12,9 @@ public class ThreeDimensionalArrayList {
|
||||||
ArrayList< ArrayList< ArrayList<String> > > space = new ArrayList<>(x_axis_length);
|
ArrayList< ArrayList< ArrayList<String> > > space = new ArrayList<>(x_axis_length);
|
||||||
|
|
||||||
//Initializing each element of ArrayList with ArrayList< ArrayList<String> >
|
//Initializing each element of ArrayList with ArrayList< ArrayList<String> >
|
||||||
for(int i=0; i< x_axis_length; i++) {
|
for(int i = 0; i < x_axis_length; i++) {
|
||||||
space.add(new ArrayList< ArrayList<String> >(y_axis_length));
|
space.add(new ArrayList< ArrayList<String> >(y_axis_length));
|
||||||
for(int j =0; j< y_axis_length; j++) {
|
for(int j = 0; j < y_axis_length; j++) {
|
||||||
space.get(i).add(new ArrayList<String>(z_axis_length));
|
space.get(i).add(new ArrayList<String>(z_axis_length));
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
@ -33,9 +33,9 @@ public class ThreeDimensionalArrayList {
|
||||||
space.get(1).get(1).add(1,"Yellow");
|
space.get(1).get(1).add(1,"Yellow");
|
||||||
|
|
||||||
//Printing colors for all the points
|
//Printing colors for all the points
|
||||||
for(int i=0; i<x_axis_length; i++) {
|
for(int i = 0; i < x_axis_length; i++) {
|
||||||
for(int j=0; j<y_axis_length; j++) {
|
for(int j = 0; j < y_axis_length; j++) {
|
||||||
for(int k=0; k<z_axis_length; k++) {
|
for(int k = 0; k < z_axis_length; k++) {
|
||||||
System.out.println("Color of point ("+i+","+j+","+k+") is :"+space.get(i).get(j).get(k));
|
System.out.println("Color of point ("+i+","+j+","+k+") is :"+space.get(i).get(j).get(k));
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
|
@ -29,3 +29,5 @@
|
||||||
- [Sorting in Java](http://www.baeldung.com/java-sorting)
|
- [Sorting in Java](http://www.baeldung.com/java-sorting)
|
||||||
- [Join and Split Arrays and Collections in Java](http://www.baeldung.com/java-join-and-split)
|
- [Join and Split Arrays and Collections in Java](http://www.baeldung.com/java-join-and-split)
|
||||||
- [A Guide to EnumMap](https://www.baeldung.com/java-enum-map)
|
- [A Guide to EnumMap](https://www.baeldung.com/java-enum-map)
|
||||||
|
- [A Guide to Iterator in Java](http://www.baeldung.com/java-iterator)
|
||||||
|
- [Differences Between HashMap and Hashtable](https://www.baeldung.com/hashmap-hashtable-differences)
|
||||||
|
|
|
@ -35,3 +35,5 @@
|
||||||
- [Guide to Java OutputStream](https://www.baeldung.com/java-outputstream)
|
- [Guide to Java OutputStream](https://www.baeldung.com/java-outputstream)
|
||||||
- [Reading a CSV File into an Array](https://www.baeldung.com/java-csv-file-array)
|
- [Reading a CSV File into an Array](https://www.baeldung.com/java-csv-file-array)
|
||||||
- [Guide to BufferedReader](https://www.baeldung.com/java-buffered-reader)
|
- [Guide to BufferedReader](https://www.baeldung.com/java-buffered-reader)
|
||||||
|
- [How to Get the File Extension of a File in Java](http://www.baeldung.com/java-file-extension)
|
||||||
|
- [Getting a File’s Mime Type in Java](http://www.baeldung.com/java-file-mime-type)
|
|
@ -160,6 +160,17 @@
|
||||||
<version>${opencsv.version}</version>
|
<version>${opencsv.version}</version>
|
||||||
<scope>test</scope>
|
<scope>test</scope>
|
||||||
</dependency>
|
</dependency>
|
||||||
|
<!-- Mime Type Resolution Libraries -->
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.apache.tika</groupId>
|
||||||
|
<artifactId>tika-core</artifactId>
|
||||||
|
<version>${tika.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>net.sf.jmimemagic</groupId>
|
||||||
|
<artifactId>jmimemagic</artifactId>
|
||||||
|
<version>${jmime-magic.version}</version>
|
||||||
|
</dependency>
|
||||||
</dependencies>
|
</dependencies>
|
||||||
|
|
||||||
<build>
|
<build>
|
||||||
|
@ -264,6 +275,9 @@
|
||||||
<esapi.version>2.1.0.1</esapi.version>
|
<esapi.version>2.1.0.1</esapi.version>
|
||||||
<jmh-generator-annprocess.version>1.19</jmh-generator-annprocess.version>
|
<jmh-generator-annprocess.version>1.19</jmh-generator-annprocess.version>
|
||||||
<async-http-client.version>2.4.5</async-http-client.version>
|
<async-http-client.version>2.4.5</async-http-client.version>
|
||||||
|
<!-- Mime Type Libraries -->
|
||||||
|
<tika.version>1.18</tika.version>
|
||||||
|
<jmime-magic.version>0.1.5</jmime-magic.version>
|
||||||
</properties>
|
</properties>
|
||||||
|
|
||||||
</project>
|
</project>
|
Before Width: | Height: | Size: 54 KiB After Width: | Height: | Size: 54 KiB |
|
@ -33,3 +33,5 @@
|
||||||
- [How to Separate Double into Integer and Decimal Parts](https://www.baeldung.com/java-separate-double-into-integer-decimal-parts)
|
- [How to Separate Double into Integer and Decimal Parts](https://www.baeldung.com/java-separate-double-into-integer-decimal-parts)
|
||||||
- [“Sneaky Throws” in Java](http://www.baeldung.com/java-sneaky-throws)
|
- [“Sneaky Throws” in Java](http://www.baeldung.com/java-sneaky-throws)
|
||||||
- [Retrieving a Class Name in Java](https://www.baeldung.com/java-class-name)
|
- [Retrieving a Class Name in Java](https://www.baeldung.com/java-class-name)
|
||||||
|
- [Java Compound Operators](https://www.baeldung.com/java-compound-operators)
|
||||||
|
- [Guide to Java Packages](https://www.baeldung.com/java-packages)
|
|
@ -0,0 +1,11 @@
|
||||||
|
## Core Java Security
|
||||||
|
|
||||||
|
### Relevant Articles:
|
||||||
|
- [MD5 Hashing in Java](http://www.baeldung.com/java-md5)
|
||||||
|
- [Guide to the Cipher Class](http://www.baeldung.com/java-cipher-class)
|
||||||
|
- [Introduction to SSL in Java](http://www.baeldung.com/java-ssl)
|
||||||
|
- [Java KeyStore API](http://www.baeldung.com/java-keystore)
|
||||||
|
- [Encrypting and Decrypting Files in Java](http://www.baeldung.com/java-cipher-input-output-stream)
|
||||||
|
- [Hashing a Password in Java](https://www.baeldung.com/java-password-hashing)
|
||||||
|
- [SSL Handshake Failures](https://www.baeldung.com/java-ssl-handshake-failures)
|
||||||
|
- [SHA-256 Hashing in Java](https://www.baeldung.com/sha-256-hashing-java)
|
|
@ -0,0 +1,55 @@
|
||||||
|
<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-security</artifactId>
|
||||||
|
<version>0.1.0-SNAPSHOT</version>
|
||||||
|
<packaging>jar</packaging>
|
||||||
|
<name>core-java-security</name>
|
||||||
|
|
||||||
|
<parent>
|
||||||
|
<groupId>com.baeldung</groupId>
|
||||||
|
<artifactId>parent-java</artifactId>
|
||||||
|
<version>0.0.1-SNAPSHOT</version>
|
||||||
|
<relativePath>../parent-java</relativePath>
|
||||||
|
</parent>
|
||||||
|
|
||||||
|
<dependencies>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.apache.commons</groupId>
|
||||||
|
<artifactId>commons-lang3</artifactId>
|
||||||
|
<version>${commons-lang3.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<!-- test scoped -->
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.assertj</groupId>
|
||||||
|
<artifactId>assertj-core</artifactId>
|
||||||
|
<version>${assertj-core.version}</version>
|
||||||
|
<scope>test</scope>
|
||||||
|
</dependency>
|
||||||
|
|
||||||
|
<dependency>
|
||||||
|
<groupId>commons-codec</groupId>
|
||||||
|
<artifactId>commons-codec</artifactId>
|
||||||
|
<version>${commons-codec.version}</version>
|
||||||
|
</dependency>
|
||||||
|
<dependency>
|
||||||
|
<groupId>org.bouncycastle</groupId>
|
||||||
|
<artifactId>bcprov-jdk15on</artifactId>
|
||||||
|
<version>${bouncycastle.version}</version>
|
||||||
|
</dependency>
|
||||||
|
</dependencies>
|
||||||
|
|
||||||
|
<properties>
|
||||||
|
|
||||||
|
<!-- util -->
|
||||||
|
<commons-lang3.version>3.8.1</commons-lang3.version>
|
||||||
|
<bouncycastle.version>1.55</bouncycastle.version>
|
||||||
|
<commons-codec.version>1.10</commons-codec.version>
|
||||||
|
|
||||||
|
<!-- testing -->
|
||||||
|
<assertj-core.version>3.10.0</assertj-core.version>
|
||||||
|
|
||||||
|
</properties>
|
||||||
|
|
||||||
|
</project>
|
|
@ -0,0 +1,19 @@
|
||||||
|
<?xml version="1.0" encoding="UTF-8"?>
|
||||||
|
<configuration>
|
||||||
|
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
|
||||||
|
<encoder>
|
||||||
|
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
|
||||||
|
</pattern>
|
||||||
|
</encoder>
|
||||||
|
</appender>
|
||||||
|
|
||||||
|
<logger name="org.springframework" level="WARN" />
|
||||||
|
<logger name="org.springframework.transaction" level="WARN" />
|
||||||
|
|
||||||
|
<!-- in order to debug some marshalling issues, this needs to be TRACE -->
|
||||||
|
<logger name="org.springframework.web.servlet.mvc" level="WARN" />
|
||||||
|
|
||||||
|
<root level="INFO">
|
||||||
|
<appender-ref ref="STDOUT" />
|
||||||
|
</root>
|
||||||
|
</configuration>
|
|
@ -5,7 +5,6 @@
|
||||||
### Relevant Articles:
|
### Relevant Articles:
|
||||||
- [Java Timer](http://www.baeldung.com/java-timer-and-timertask)
|
- [Java Timer](http://www.baeldung.com/java-timer-and-timertask)
|
||||||
- [How to Run a Shell Command in Java](http://www.baeldung.com/run-shell-command-in-java)
|
- [How to Run a Shell Command in Java](http://www.baeldung.com/run-shell-command-in-java)
|
||||||
- [MD5 Hashing in Java](http://www.baeldung.com/java-md5)
|
|
||||||
- [How to Print Screen in Java](http://www.baeldung.com/print-screen-in-java)
|
- [How to Print Screen in Java](http://www.baeldung.com/print-screen-in-java)
|
||||||
- [A Guide To Java Regular Expressions API](http://www.baeldung.com/regular-expressions-java)
|
- [A Guide To Java Regular Expressions API](http://www.baeldung.com/regular-expressions-java)
|
||||||
- [Getting Started with Java Properties](http://www.baeldung.com/java-properties)
|
- [Getting Started with Java Properties](http://www.baeldung.com/java-properties)
|
||||||
|
@ -23,44 +22,27 @@
|
||||||
- [Difference between URL and URI](http://www.baeldung.com/java-url-vs-uri)
|
- [Difference between URL and URI](http://www.baeldung.com/java-url-vs-uri)
|
||||||
- [Creating a Java Compiler Plugin](http://www.baeldung.com/java-build-compiler-plugin)
|
- [Creating a Java Compiler Plugin](http://www.baeldung.com/java-build-compiler-plugin)
|
||||||
- [Quick Guide to Java Stack](http://www.baeldung.com/java-stack)
|
- [Quick Guide to Java Stack](http://www.baeldung.com/java-stack)
|
||||||
- [Guide to java.util.Formatter](http://www.baeldung.com/java-string-formatter)
|
|
||||||
- [Guide to the Cipher Class](http://www.baeldung.com/java-cipher-class)
|
|
||||||
- [Compiling Java *.class Files with javac](http://www.baeldung.com/javac)
|
- [Compiling Java *.class Files with javac](http://www.baeldung.com/javac)
|
||||||
- [A Guide to Iterator in Java](http://www.baeldung.com/java-iterator)
|
|
||||||
- [Introduction to Javadoc](http://www.baeldung.com/javadoc)
|
- [Introduction to Javadoc](http://www.baeldung.com/javadoc)
|
||||||
- [Guide to the Externalizable Interface in Java](http://www.baeldung.com/java-externalizable)
|
- [Guide to the Externalizable Interface in Java](http://www.baeldung.com/java-externalizable)
|
||||||
- [A Practical Guide to DecimalFormat](http://www.baeldung.com/java-decimalformat)
|
|
||||||
- [How to Detect the OS Using Java](http://www.baeldung.com/java-detect-os)
|
- [How to Detect the OS Using Java](http://www.baeldung.com/java-detect-os)
|
||||||
- [ASCII Art in Java](http://www.baeldung.com/ascii-art-in-java)
|
- [ASCII Art in Java](http://www.baeldung.com/ascii-art-in-java)
|
||||||
- [What is the serialVersionUID?](http://www.baeldung.com/java-serial-version-uid)
|
- [What is the serialVersionUID?](http://www.baeldung.com/java-serial-version-uid)
|
||||||
- [A Guide to the ResourceBundle](http://www.baeldung.com/java-resourcebundle)
|
- [A Guide to the ResourceBundle](http://www.baeldung.com/java-resourcebundle)
|
||||||
- [Class Loaders in Java](http://www.baeldung.com/java-classloaders)
|
- [Class Loaders in Java](http://www.baeldung.com/java-classloaders)
|
||||||
- [Introduction to SSL in Java](http://www.baeldung.com/java-ssl)
|
|
||||||
- [Java KeyStore API](http://www.baeldung.com/java-keystore)
|
|
||||||
- [Double-Checked Locking with Singleton](http://www.baeldung.com/java-singleton-double-checked-locking)
|
- [Double-Checked Locking with Singleton](http://www.baeldung.com/java-singleton-double-checked-locking)
|
||||||
- [Guide to Java Clock Class](http://www.baeldung.com/java-clock)
|
- [Guide to Java Clock Class](http://www.baeldung.com/java-clock)
|
||||||
- [Importance of Main Manifest Attribute in a Self-Executing JAR](http://www.baeldung.com/java-jar-executable-manifest-main-class)
|
- [Importance of Main Manifest Attribute in a Self-Executing JAR](http://www.baeldung.com/java-jar-executable-manifest-main-class)
|
||||||
- [How to Get the File Extension of a File in Java](http://www.baeldung.com/java-file-extension)
|
|
||||||
- [Java Global Exception Handler](http://www.baeldung.com/java-global-exception-handler)
|
- [Java Global Exception Handler](http://www.baeldung.com/java-global-exception-handler)
|
||||||
- [Encrypting and Decrypting Files in Java](http://www.baeldung.com/java-cipher-input-output-stream)
|
|
||||||
- [How to Get the Size of an Object in Java](http://www.baeldung.com/java-size-of-object)
|
- [How to Get the Size of an Object in Java](http://www.baeldung.com/java-size-of-object)
|
||||||
- [Guide to Java Instrumentation](http://www.baeldung.com/java-instrumentation)
|
- [Guide to Java Instrumentation](http://www.baeldung.com/java-instrumentation)
|
||||||
- [Getting a File’s Mime Type in Java](http://www.baeldung.com/java-file-mime-type)
|
|
||||||
- [Common Java Exceptions](http://www.baeldung.com/java-common-exceptions)
|
- [Common Java Exceptions](http://www.baeldung.com/java-common-exceptions)
|
||||||
- [Throw Exception in Optional in Java 8](https://www.baeldung.com/java-optional-throw-exception)
|
- [Throw Exception in Optional in Java 8](https://www.baeldung.com/java-optional-throw-exception)
|
||||||
- [Add a Character to a String at a Given Position](https://www.baeldung.com/java-add-character-to-string)
|
|
||||||
- [Calculating the nth Root in Java](https://www.baeldung.com/java-nth-root)
|
|
||||||
- [Convert Double to String, Removing Decimal Places](https://www.baeldung.com/java-double-to-string)
|
|
||||||
- [ZoneOffset in Java](https://www.baeldung.com/java-zone-offset)
|
|
||||||
- [Hashing a Password in Java](https://www.baeldung.com/java-password-hashing)
|
|
||||||
- [Merging java.util.Properties Objects](https://www.baeldung.com/java-merging-properties)
|
- [Merging java.util.Properties Objects](https://www.baeldung.com/java-merging-properties)
|
||||||
- [A Guide to SimpleDateFormat](https://www.baeldung.com/java-simple-date-format)
|
- [Merging java.util.Properties Objects](https://www.baeldung.com/java-merging-properties)
|
||||||
- [SSL Handshake Failures](https://www.baeldung.com/java-ssl-handshake-failures)
|
|
||||||
- [Changing the Order in a Sum Operation Can Produce Different Results?](https://www.baeldung.com/java-floating-point-sum-order)
|
|
||||||
- [Java – Try with Resources](https://www.baeldung.com/java-try-with-resources)
|
- [Java – Try with Resources](https://www.baeldung.com/java-try-with-resources)
|
||||||
- [Abstract Classes in Java](https://www.baeldung.com/java-abstract-class)
|
- [Abstract Classes in Java](https://www.baeldung.com/java-abstract-class)
|
||||||
- [Guide to Character Encoding](https://www.baeldung.com/java-char-encoding)
|
- [Guide to Character Encoding](https://www.baeldung.com/java-char-encoding)
|
||||||
- [Calculate the Area of a Circle in Java](https://www.baeldung.com/java-calculate-circle-area)
|
|
||||||
- [A Guide to the Java Math Class](https://www.baeldung.com/java-lang-math)
|
|
||||||
- [Graphs in Java](https://www.baeldung.com/java-graphs)
|
- [Graphs in Java](https://www.baeldung.com/java-graphs)
|
||||||
- [Console I/O in Java](http://www.baeldung.com/java-console-input-output)
|
- [Console I/O in Java](http://www.baeldung.com/java-console-input-output)
|
||||||
|
- [Formatting with printf() in Java](https://www.baeldung.com/java-printstream-printf)
|
||||||
|
|
|
@ -24,11 +24,6 @@
|
||||||
<artifactId>commons-lang3</artifactId>
|
<artifactId>commons-lang3</artifactId>
|
||||||
<version>${commons-lang3.version}</version>
|
<version>${commons-lang3.version}</version>
|
||||||
</dependency>
|
</dependency>
|
||||||
<dependency>
|
|
||||||
<groupId>org.bouncycastle</groupId>
|
|
||||||
<artifactId>bcprov-jdk15on</artifactId>
|
|
||||||
<version>${bouncycastle.version}</version>
|
|
||||||
</dependency>
|
|
||||||
<dependency>
|
<dependency>
|
||||||
<groupId>org.unix4j</groupId>
|
<groupId>org.unix4j</groupId>
|
||||||
<artifactId>unix4j-command</artifactId>
|
<artifactId>unix4j-command</artifactId>
|
||||||
|
@ -75,12 +70,6 @@
|
||||||
<version>${assertj-core.version}</version>
|
<version>${assertj-core.version}</version>
|
||||||
<scope>test</scope>
|
<scope>test</scope>
|
||||||
</dependency>
|
</dependency>
|
||||||
|
|
||||||
<dependency>
|
|
||||||
<groupId>commons-codec</groupId>
|
|
||||||
<artifactId>commons-codec</artifactId>
|
|
||||||
<version>${commons-codec.version}</version>
|
|
||||||
</dependency>
|
|
||||||
<dependency>
|
<dependency>
|
||||||
<groupId>org.javamoney</groupId>
|
<groupId>org.javamoney</groupId>
|
||||||
<artifactId>moneta</artifactId>
|
<artifactId>moneta</artifactId>
|
||||||
|
@ -126,17 +115,6 @@
|
||||||
<artifactId>h2</artifactId>
|
<artifactId>h2</artifactId>
|
||||||
<version>${h2database.version}</version>
|
<version>${h2database.version}</version>
|
||||||
</dependency>
|
</dependency>
|
||||||
<!-- Mime Type Resolution Libraries -->
|
|
||||||
<dependency>
|
|
||||||
<groupId>org.apache.tika</groupId>
|
|
||||||
<artifactId>tika-core</artifactId>
|
|
||||||
<version>${tika.version}</version>
|
|
||||||
</dependency>
|
|
||||||
<dependency>
|
|
||||||
<groupId>net.sf.jmimemagic</groupId>
|
|
||||||
<artifactId>jmimemagic</artifactId>
|
|
||||||
<version>${jmime-magic.version}</version>
|
|
||||||
</dependency>
|
|
||||||
<!-- instrumentation -->
|
<!-- instrumentation -->
|
||||||
<dependency>
|
<dependency>
|
||||||
<groupId>org.javassist</groupId>
|
<groupId>org.javassist</groupId>
|
||||||
|
@ -477,8 +455,6 @@
|
||||||
|
|
||||||
<!-- util -->
|
<!-- util -->
|
||||||
<commons-lang3.version>3.5</commons-lang3.version>
|
<commons-lang3.version>3.5</commons-lang3.version>
|
||||||
<bouncycastle.version>1.55</bouncycastle.version>
|
|
||||||
<commons-codec.version>1.10</commons-codec.version>
|
|
||||||
<commons-io.version>2.5</commons-io.version>
|
<commons-io.version>2.5</commons-io.version>
|
||||||
<commons-math3.version>3.6.1</commons-math3.version>
|
<commons-math3.version>3.6.1</commons-math3.version>
|
||||||
<decimal4j.version>1.0.3</decimal4j.version>
|
<decimal4j.version>1.0.3</decimal4j.version>
|
||||||
|
@ -509,9 +485,6 @@
|
||||||
<spring-boot-maven-plugin.version>2.0.3.RELEASE</spring-boot-maven-plugin.version>
|
<spring-boot-maven-plugin.version>2.0.3.RELEASE</spring-boot-maven-plugin.version>
|
||||||
<exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
|
<exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
|
||||||
<icu4j.version>61.1</icu4j.version>
|
<icu4j.version>61.1</icu4j.version>
|
||||||
<!-- Mime Type Libraries -->
|
|
||||||
<tika.version>1.18</tika.version>
|
|
||||||
<jmime-magic.version>0.1.5</jmime-magic.version>
|
|
||||||
<!-- instrumentation -->
|
<!-- instrumentation -->
|
||||||
<javaassist.version>3.21.0-GA</javaassist.version>
|
<javaassist.version>3.21.0-GA</javaassist.version>
|
||||||
|
|
||||||
|
|
|
@ -0,0 +1,29 @@
|
||||||
|
package com.baeldung.curltojava;
|
||||||
|
|
||||||
|
import java.io.BufferedInputStream;
|
||||||
|
import java.io.IOException;
|
||||||
|
import java.io.InputStream;
|
||||||
|
import java.util.logging.Level;
|
||||||
|
import java.util.logging.Logger;
|
||||||
|
|
||||||
|
public class JavaCurlExamples {
|
||||||
|
|
||||||
|
public static String inputStreamToString(InputStream inputStream) {
|
||||||
|
final int bufferSize = 8 * 1024;
|
||||||
|
byte[] buffer = new byte[bufferSize];
|
||||||
|
final StringBuilder builder = new StringBuilder();
|
||||||
|
try (BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream, bufferSize)) {
|
||||||
|
while (bufferedInputStream.read(buffer) != -1) {
|
||||||
|
builder.append(new String(buffer));
|
||||||
|
}
|
||||||
|
} catch (IOException ex) {
|
||||||
|
Logger.getLogger(JavaCurlExamples.class.getName()).log(Level.SEVERE, null, ex);
|
||||||
|
}
|
||||||
|
return builder.toString();
|
||||||
|
}
|
||||||
|
|
||||||
|
public static void consumeInputStream(InputStream inputStream) {
|
||||||
|
inputStreamToString(inputStream);
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -0,0 +1,55 @@
|
||||||
|
package com.baeldung.curltojava;
|
||||||
|
|
||||||
|
import java.io.File;
|
||||||
|
import java.io.IOException;
|
||||||
|
import java.io.InputStream;
|
||||||
|
import java.net.HttpURLConnection;
|
||||||
|
import java.net.URL;
|
||||||
|
|
||||||
|
import org.junit.Assert;
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class JavaCurlExamplesUnitTest {
|
||||||
|
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenCommand_whenCalled_thenProduceZeroExitCode() throws IOException {
|
||||||
|
String command = "curl --location --request GET \"https://postman-echo.com/get?foo1=bar1&foo2=bar2\"";
|
||||||
|
ProcessBuilder processBuilder = new ProcessBuilder(command.replaceAll("\"", "").split(" "));
|
||||||
|
processBuilder.directory(new File("/home/"));
|
||||||
|
Process process = processBuilder.start();
|
||||||
|
InputStream inputStream = process.getInputStream();
|
||||||
|
// Consume the inputStream so the process can exit
|
||||||
|
JavaCurlExamples.consumeInputStream(inputStream);
|
||||||
|
int exitCode = process.exitValue();
|
||||||
|
|
||||||
|
Assert.assertEquals(0, exitCode);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenNewCommands_whenCalled_thenCheckIfIsAlive() throws IOException {
|
||||||
|
String command = "curl --location --request GET \"https://postman-echo.com/get?foo1=bar1&foo2=bar2\"";
|
||||||
|
ProcessBuilder processBuilder = new ProcessBuilder(command.replaceAll("\"", "").split(" "));
|
||||||
|
processBuilder.directory(new File("/home/"));
|
||||||
|
Process process = processBuilder.start();
|
||||||
|
|
||||||
|
// Re-use processBuilder
|
||||||
|
processBuilder.command(new String[]{"newCommand", "arguments"});
|
||||||
|
|
||||||
|
Assert.assertEquals(true, process.isAlive());
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void whenRequestGet_thenReturnSuccessResponseCode() throws IOException {
|
||||||
|
String url = "https://postman-echo.com/get?foo1=bar1&foo2=bar2";
|
||||||
|
URL urlObj = new URL(url);
|
||||||
|
HttpURLConnection connection = (HttpURLConnection) urlObj.openConnection();
|
||||||
|
connection.setDoOutput(true);
|
||||||
|
connection.setInstanceFollowRedirects(false);
|
||||||
|
connection.setRequestMethod("GET");
|
||||||
|
connection.connect();
|
||||||
|
|
||||||
|
Assert.assertEquals(HttpURLConnection.HTTP_OK, connection.getResponseCode());
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -1,83 +0,0 @@
|
||||||
package com.baeldung.string;
|
|
||||||
|
|
||||||
|
|
||||||
import org.apache.commons.lang3.StringUtils;
|
|
||||||
import org.junit.Test;
|
|
||||||
|
|
||||||
import static org.junit.Assert.assertFalse;
|
|
||||||
import static org.junit.Assert.assertTrue;
|
|
||||||
|
|
||||||
public class StringReplaceAndRemoveUnitTest {
|
|
||||||
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenTestStrings_whenReplace_thenProcessedString() {
|
|
||||||
|
|
||||||
String master = "Hello World Baeldung!";
|
|
||||||
String target = "Baeldung";
|
|
||||||
String replacement = "Java";
|
|
||||||
String processed = master.replace(target, replacement);
|
|
||||||
assertTrue(processed.contains(replacement));
|
|
||||||
assertFalse(processed.contains(target));
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenTestStrings_whenReplaceAll_thenProcessedString() {
|
|
||||||
|
|
||||||
String master2 = "Welcome to Baeldung, Hello World Baeldung";
|
|
||||||
String regexTarget= "(Baeldung)$";
|
|
||||||
String replacement = "Java";
|
|
||||||
String processed2 = master2.replaceAll(regexTarget, replacement);
|
|
||||||
assertTrue(processed2.endsWith("Java"));
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenTestStrings_whenStringBuilderMethods_thenProcessedString() {
|
|
||||||
|
|
||||||
String master = "Hello World Baeldung!";
|
|
||||||
String target = "Baeldung";
|
|
||||||
String replacement = "Java";
|
|
||||||
|
|
||||||
int startIndex = master.indexOf(target);
|
|
||||||
int stopIndex = startIndex + target.length();
|
|
||||||
|
|
||||||
StringBuilder builder = new StringBuilder(master);
|
|
||||||
|
|
||||||
|
|
||||||
builder.delete(startIndex, stopIndex);
|
|
||||||
assertFalse(builder.toString().contains(target));
|
|
||||||
|
|
||||||
|
|
||||||
builder.replace(startIndex, stopIndex, replacement);
|
|
||||||
assertTrue(builder.toString().contains(replacement));
|
|
||||||
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
@Test
|
|
||||||
public void givenTestStrings_whenStringUtilsMethods_thenProcessedStrings() {
|
|
||||||
|
|
||||||
String master = "Hello World Baeldung!";
|
|
||||||
String target = "Baeldung";
|
|
||||||
String replacement = "Java";
|
|
||||||
|
|
||||||
String processed = StringUtils.replace(master, target, replacement);
|
|
||||||
assertTrue(processed.contains(replacement));
|
|
||||||
|
|
||||||
String master2 = "Hello World Baeldung!";
|
|
||||||
String target2 = "baeldung";
|
|
||||||
String processed2 = StringUtils.replaceIgnoreCase(master2, target2, replacement);
|
|
||||||
assertFalse(processed2.contains(target));
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
}
|
|
|
@ -47,3 +47,7 @@
|
||||||
- [Dependency Injection for Kotlin with Injekt](https://www.baeldung.com/kotlin-dependency-injection-with-injekt)
|
- [Dependency Injection for Kotlin with Injekt](https://www.baeldung.com/kotlin-dependency-injection-with-injekt)
|
||||||
- [Implementing a Binary Tree in Kotlin](https://www.baeldung.com/kotlin-binary-tree)
|
- [Implementing a Binary Tree in Kotlin](https://www.baeldung.com/kotlin-binary-tree)
|
||||||
- [Generate a Random Alphanumeric String in Kotlin](https://www.baeldung.com/kotlin-random-alphanumeric-string)
|
- [Generate a Random Alphanumeric String in Kotlin](https://www.baeldung.com/kotlin-random-alphanumeric-string)
|
||||||
|
- [Kotlin Contracts](https://www.baeldung.com/kotlin-contracts)
|
||||||
|
- [Operator Overloading in Kotlin](https://www.baeldung.com/kotlin-operator-overloading)
|
||||||
|
- [Inline Classes in Kotlin](https://www.baeldung.com/kotlin-inline-classes)
|
||||||
|
- [Creating Java static final Equivalents in Kotlin](https://www.baeldung.com/kotlin-java-static-final)
|
||||||
|
|
|
@ -9,3 +9,4 @@
|
||||||
- [Exclude Fields from Serialization in Gson](http://www.baeldung.com/gson-exclude-fields-serialization)
|
- [Exclude Fields from Serialization in Gson](http://www.baeldung.com/gson-exclude-fields-serialization)
|
||||||
- [Save Data to a JSON File with Gson](https://www.baeldung.com/gson-save-file)
|
- [Save Data to a JSON File with Gson](https://www.baeldung.com/gson-save-file)
|
||||||
- [Convert JSON to a Map Using Gson](https://www.baeldung.com/gson-json-to-map)
|
- [Convert JSON to a Map Using Gson](https://www.baeldung.com/gson-json-to-map)
|
||||||
|
- [Working with Primitive Values in Gson](https://www.baeldung.com/java-gson-primitives)
|
||||||
|
|
|
@ -18,4 +18,3 @@
|
||||||
- [Hamcrest Text Matchers](http://www.baeldung.com/hamcrest-text-matchers)
|
- [Hamcrest Text Matchers](http://www.baeldung.com/hamcrest-text-matchers)
|
||||||
- [Quick Guide to the Guava RateLimiter](http://www.baeldung.com/guava-rate-limiter)
|
- [Quick Guide to the Guava RateLimiter](http://www.baeldung.com/guava-rate-limiter)
|
||||||
- [Hamcrest File Matchers](https://www.baeldung.com/hamcrest-file-matchers)
|
- [Hamcrest File Matchers](https://www.baeldung.com/hamcrest-file-matchers)
|
||||||
- [SHA-256 Hashing in Java](https://www.baeldung.com/sha-256-hashing-java)
|
|
||||||
|
|
|
@ -17,3 +17,5 @@
|
||||||
- [Finding the Highest Value in a Java Map](https://www.baeldung.com/java-find-map-max)
|
- [Finding the Highest Value in a Java Map](https://www.baeldung.com/java-find-map-max)
|
||||||
- [Merging Two Maps with Java 8](https://www.baeldung.com/java-merge-maps)
|
- [Merging Two Maps with Java 8](https://www.baeldung.com/java-merge-maps)
|
||||||
- [How to Check If a Key Exists in a Map](https://www.baeldung.com/java-map-key-exists)
|
- [How to Check If a Key Exists in a Map](https://www.baeldung.com/java-map-key-exists)
|
||||||
|
- [Comparing Two HashMaps in Java](https://www.baeldung.com/java-compare-hashmaps)
|
||||||
|
- [Immutable Map Implementations in Java](https://www.baeldung.com/java-immutable-maps)
|
||||||
|
|
|
@ -26,3 +26,5 @@
|
||||||
- [Format ZonedDateTime to String](https://www.baeldung.com/java-format-zoned-datetime-string)
|
- [Format ZonedDateTime to String](https://www.baeldung.com/java-format-zoned-datetime-string)
|
||||||
- [Convert Between java.time.Instant and java.sql.Timestamp](https://www.baeldung.com/java-time-instant-to-java-sql-timestamp)
|
- [Convert Between java.time.Instant and java.sql.Timestamp](https://www.baeldung.com/java-time-instant-to-java-sql-timestamp)
|
||||||
- [Convert between String and Timestamp](https://www.baeldung.com/java-string-to-timestamp)
|
- [Convert between String and Timestamp](https://www.baeldung.com/java-string-to-timestamp)
|
||||||
|
- [A Guide to SimpleDateFormat](https://www.baeldung.com/java-simple-date-format)
|
||||||
|
- [ZoneOffset in Java](https://www.baeldung.com/java-zone-offset)
|
|
@ -8,6 +8,8 @@ import java.time.Duration;
|
||||||
import java.time.LocalDate;
|
import java.time.LocalDate;
|
||||||
import java.time.LocalDateTime;
|
import java.time.LocalDateTime;
|
||||||
import java.time.Period;
|
import java.time.Period;
|
||||||
|
import java.time.ZoneId;
|
||||||
|
import java.time.ZonedDateTime;
|
||||||
import java.time.temporal.ChronoUnit;
|
import java.time.temporal.ChronoUnit;
|
||||||
import java.util.Date;
|
import java.util.Date;
|
||||||
import java.util.Locale;
|
import java.util.Locale;
|
||||||
|
|
|
@ -13,3 +13,9 @@
|
||||||
- [Find All Pairs of Numbers in an Array That Add Up to a Given Sum](http://www.baeldung.com/java-algorithm-number-pairs-sum)
|
- [Find All Pairs of Numbers in an Array That Add Up to a Given Sum](http://www.baeldung.com/java-algorithm-number-pairs-sum)
|
||||||
- [Java – Random Long, Float, Integer and Double](http://www.baeldung.com/java-generate-random-long-float-integer-double)
|
- [Java – Random Long, Float, Integer and Double](http://www.baeldung.com/java-generate-random-long-float-integer-double)
|
||||||
- [Using Math.sin with Degrees](https://www.baeldung.com/java-math-sin-degrees)
|
- [Using Math.sin with Degrees](https://www.baeldung.com/java-math-sin-degrees)
|
||||||
|
- [A Practical Guide to DecimalFormat](http://www.baeldung.com/java-decimalformat)
|
||||||
|
- [Calculating the nth Root in Java](https://www.baeldung.com/java-nth-root)
|
||||||
|
- [Convert Double to String, Removing Decimal Places](https://www.baeldung.com/java-double-to-string)
|
||||||
|
- [Changing the Order in a Sum Operation Can Produce Different Results?](https://www.baeldung.com/java-floating-point-sum-order)
|
||||||
|
- [Calculate the Area of a Circle in Java](https://www.baeldung.com/java-calculate-circle-area)
|
||||||
|
- [A Guide to the Java Math Class](https://www.baeldung.com/java-lang-math)
|
|
@ -14,3 +14,4 @@
|
||||||
- [Primitive Type Streams in Java 8](http://www.baeldung.com/java-8-primitive-streams)
|
- [Primitive Type Streams in Java 8](http://www.baeldung.com/java-8-primitive-streams)
|
||||||
- [Stream Ordering in Java](https://www.baeldung.com/java-stream-ordering)
|
- [Stream Ordering in Java](https://www.baeldung.com/java-stream-ordering)
|
||||||
- [Introduction to Protonpack](https://www.baeldung.com/java-protonpack)
|
- [Introduction to Protonpack](https://www.baeldung.com/java-protonpack)
|
||||||
|
- [Java Stream Filter with Lambda Expression](https://www.baeldung.com/java-stream-filter-lambda)
|
||||||
|
|
|
@ -45,3 +45,7 @@
|
||||||
- [Remove or Replace part of a String in Java](https://www.baeldung.com/java-remove-replace-string-part)
|
- [Remove or Replace part of a String in Java](https://www.baeldung.com/java-remove-replace-string-part)
|
||||||
- [Replace a Character at a Specific Index in a String in Java](https://www.baeldung.com/java-replace-character-at-index)
|
- [Replace a Character at a Specific Index in a String in Java](https://www.baeldung.com/java-replace-character-at-index)
|
||||||
- [Convert a Comma Separated String to a List in Java](https://www.baeldung.com/java-string-with-separator-to-list)
|
- [Convert a Comma Separated String to a List in Java](https://www.baeldung.com/java-string-with-separator-to-list)
|
||||||
|
- [Guide to java.util.Formatter](http://www.baeldung.com/java-string-formatter)
|
||||||
|
- [Add a Character to a String at a Given Position](https://www.baeldung.com/java-add-character-to-string)
|
||||||
|
- [Remove Leading and Trailing Characters from a String](https://www.baeldung.com/java-remove-trailing-characters)
|
||||||
|
- [Concatenating Strings In Java](https://www.baeldung.com/java-strings-concatenation)
|
||||||
|
|
|
@ -1,7 +1,6 @@
|
||||||
package com.baeldung.string.formatter;
|
package com.baeldung.string.formatter;
|
||||||
|
|
||||||
import org.junit.BeforeClass;
|
import static org.junit.Assert.assertEquals;
|
||||||
import org.junit.Test;
|
|
||||||
|
|
||||||
import java.text.DateFormat;
|
import java.text.DateFormat;
|
||||||
import java.text.SimpleDateFormat;
|
import java.text.SimpleDateFormat;
|
||||||
|
@ -11,9 +10,11 @@ import java.time.ZoneId;
|
||||||
import java.time.format.DateTimeFormatter;
|
import java.time.format.DateTimeFormatter;
|
||||||
import java.util.Calendar;
|
import java.util.Calendar;
|
||||||
import java.util.Date;
|
import java.util.Date;
|
||||||
|
import java.util.Locale;
|
||||||
import java.util.TimeZone;
|
import java.util.TimeZone;
|
||||||
|
|
||||||
import static org.junit.Assert.assertEquals;
|
import org.junit.BeforeClass;
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
public class DateToStringFormatterUnitTest {
|
public class DateToStringFormatterUnitTest {
|
||||||
|
|
||||||
|
@ -40,7 +41,7 @@ public class DateToStringFormatterUnitTest {
|
||||||
@Test
|
@Test
|
||||||
public void whenDateConvertedUsingDateFormatToString_thenCorrect() {
|
public void whenDateConvertedUsingDateFormatToString_thenCorrect() {
|
||||||
String formattedDate = DateFormat
|
String formattedDate = DateFormat
|
||||||
.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT)
|
.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT, Locale.US)
|
||||||
.format(date);
|
.format(date);
|
||||||
|
|
||||||
assertEquals(EXPECTED_STRING_DATE, formattedDate);
|
assertEquals(EXPECTED_STRING_DATE, formattedDate);
|
||||||
|
|
|
@ -0,0 +1,19 @@
|
||||||
|
package com.baeldung.string.interview;
|
||||||
|
|
||||||
|
import java.math.BigDecimal;
|
||||||
|
import java.text.NumberFormat;
|
||||||
|
import java.util.Locale;
|
||||||
|
import static org.junit.Assert.assertEquals;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class LocaleUnitTest {
|
||||||
|
@Test
|
||||||
|
public void whenUsingLocal_thenCorrectResultsForDifferentLocale() {
|
||||||
|
Locale usLocale = Locale.US;
|
||||||
|
BigDecimal number = new BigDecimal(102_300.456d);
|
||||||
|
|
||||||
|
NumberFormat usNumberFormat = NumberFormat.getCurrencyInstance(usLocale);
|
||||||
|
assertEquals(usNumberFormat.format(number), "$102,300.46");
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,29 @@
|
||||||
|
package com.baeldung.string.interview;
|
||||||
|
|
||||||
|
import static org.assertj.core.api.Assertions.assertThat;
|
||||||
|
|
||||||
|
import java.util.Arrays;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class StringAnagramUnitTest {
|
||||||
|
public boolean isAnagram(String s1, String s2) {
|
||||||
|
if(s1.length() != s2.length())
|
||||||
|
return false;
|
||||||
|
|
||||||
|
char[] arr1 = s1.toCharArray();
|
||||||
|
char[] arr2 = s2.toCharArray();
|
||||||
|
|
||||||
|
Arrays.sort(arr1);
|
||||||
|
Arrays.sort(arr2);
|
||||||
|
|
||||||
|
return Arrays.equals(arr1, arr2);
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void whenTestAnagrams_thenTestingCorrectly() {
|
||||||
|
assertThat(isAnagram("car", "arc")).isTrue();
|
||||||
|
assertThat(isAnagram("west", "stew")).isTrue();
|
||||||
|
assertThat(isAnagram("west", "east")).isFalse();
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,20 @@
|
||||||
|
package com.baeldung.string.interview;
|
||||||
|
|
||||||
|
import static org.junit.Assert.assertEquals;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class StringChangeCaseUnitTest {
|
||||||
|
@Test
|
||||||
|
public void givenString_whenChangingToUppercase_thenCaseChanged() {
|
||||||
|
String s = "Welcome to Baeldung!";
|
||||||
|
assertEquals("WELCOME TO BAELDUNG!", s.toUpperCase());
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenString_whenChangingToLowerrcase_thenCaseChanged() {
|
||||||
|
String s = "Welcome to Baeldung!";
|
||||||
|
assertEquals("welcome to baeldung!", s.toLowerCase());
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,28 @@
|
||||||
|
package com.baeldung.string.interview;
|
||||||
|
|
||||||
|
import static org.junit.Assert.assertEquals;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class StringCountOccurrencesUnitTest {
|
||||||
|
public int countOccurrences(String s, char c) {
|
||||||
|
int count = 0;
|
||||||
|
for (int i = 0; i < s.length(); i++) {
|
||||||
|
if (s.charAt(i) == c) {
|
||||||
|
count++;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return count;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenString_whenCountingFrequencyOfChar_thenCountCorrect() {
|
||||||
|
assertEquals(3, countOccurrences("united states", 't'));
|
||||||
|
}
|
||||||
|
|
||||||
|
public void givenString_whenUsingJava8_thenCountingOfCharCorrect() {
|
||||||
|
String str = "united states";
|
||||||
|
long count = str.chars().filter(ch -> (char)ch == 't').count();
|
||||||
|
assertEquals(3, count);
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,14 @@
|
||||||
|
package com.baeldung.string.interview;
|
||||||
|
|
||||||
|
import static org.junit.Assert.assertEquals;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class StringFormatUnitTest {
|
||||||
|
@Test
|
||||||
|
public void givenString_whenUsingStringFormat_thenStringFormatted() {
|
||||||
|
String title = "Baeldung";
|
||||||
|
String formatted = String.format("Title is %s", title);
|
||||||
|
assertEquals(formatted, "Title is Baeldung");
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,17 @@
|
||||||
|
package com.baeldung.string.interview;
|
||||||
|
|
||||||
|
import static org.assertj.core.api.Assertions.assertThat;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class StringInternUnitTest {
|
||||||
|
@Test
|
||||||
|
public void whenCallingStringIntern_thenStringsInterned() {
|
||||||
|
String s1 = "Baeldung";
|
||||||
|
String s2 = new String("Baeldung");
|
||||||
|
String s3 = new String("Baeldung").intern();
|
||||||
|
|
||||||
|
assertThat(s1 == s2).isFalse();
|
||||||
|
assertThat(s1 == s3).isTrue();
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,18 @@
|
||||||
|
package com.baeldung.string.interview;
|
||||||
|
|
||||||
|
import java.util.StringJoiner;
|
||||||
|
import static org.junit.Assert.assertEquals;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class StringJoinerUnitTest {
|
||||||
|
@Test
|
||||||
|
public void whenUsingStringJoiner_thenStringsJoined() {
|
||||||
|
StringJoiner joiner = new StringJoiner(",", "[", "]");
|
||||||
|
joiner.add("Red")
|
||||||
|
.add("Green")
|
||||||
|
.add("Blue");
|
||||||
|
|
||||||
|
assertEquals(joiner.toString(), "[Red,Green,Blue]");
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,29 @@
|
||||||
|
package com.baeldung.string.interview;
|
||||||
|
|
||||||
|
import static org.assertj.core.api.Assertions.assertThat;
|
||||||
|
|
||||||
|
import org.junit.Test;
|
||||||
|
|
||||||
|
public class StringPalindromeUnitTest {
|
||||||
|
|
||||||
|
public boolean isPalindrome(String text) {
|
||||||
|
int forward = 0;
|
||||||
|
int backward = text.length() - 1;
|
||||||
|
while (backward > forward) {
|
||||||
|
char forwardChar = text.charAt(forward++);
|
||||||
|
char backwardChar = text.charAt(backward--);
|
||||||
|
if (forwardChar != backwardChar)
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
@Test
|
||||||
|
public void givenIsPalindromeMethod_whenCheckingString_thenFindIfPalindrome() {
|
||||||
|
assertThat(isPalindrome("madam")).isTrue();
|
||||||
|
assertThat(isPalindrome("radar")).isTrue();
|
||||||
|
assertThat(isPalindrome("level")).isTrue();
|
||||||
|
|
||||||
|
assertThat(isPalindrome("baeldung")).isFalse();
|
||||||
|
}
|
||||||
|
}
|
Some files were not shown because too many files have changed in this diff Show More
Loading…
Reference in New Issue