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java-tutorials
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Merge branch 'master' of https://github.com/eugenp/tutorials

This commit is contained in:
Cristian Rosu 2020-05-03 13:33:10 +03:00
parent 7feb9bfb1e df332afd65
commit 7b071a05e4
3894 changed files with 74875 additions and 39004 deletions
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3
.gitignore vendored
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@ -65,6 +65,7 @@ core-java-io/target_link.txt
core-java/src/main/java/com/baeldung/manifest/MANIFEST.MF
ethereum/logs/
jmeter/src/main/resources/*-JMeter.csv
ninja/devDb.mv.db
**/node_modules/
**/dist
@ -72,8 +73,6 @@ jmeter/src/main/resources/*-JMeter.csv
**/out-tsc
**/nbproject/
**/nb-configuration.xml
core-scala/.cache-main
core-scala/.cache-tests
persistence-modules/hibernate5/transaction.log

44
README.md
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@ -22,10 +22,38 @@ This project is **a collection of small and focused tutorials** - each covering
A strong focus of these is, of course, the Spring Framework - Spring, Spring Boot and Spring Security.
In additional to Spring, the modules here are covering a number of aspects in Java.
Profile based segregation
====================
We are using maven build profiles to segregate the huge list of individual projects we have in our repository.
The projects are broadly divided into 3 list: first, second and heavy.
Next, they are segregated further on the basis of tests that we want to execute.
Therefore, we have a total of 6 profiles:
| Profile | Includes | Type of test enabled |
| ----------------------- | --------------------------- | -------------------- |
| default-first | First set of projects | *UnitTest |
| integration-lite-first | First set of projects | *IntegrationTest |
| default-second | Second set of projects | *UnitTest |
| integration-lite-second | Second set of projects | *IntegrationTest |
| default-heavy | Heavy/long running projects | *UnitTest |
| integration-heavy | Heavy/long running projects | *IntegrationTest |
Building the project
====================
To do the full build, do: `mvn clean install`
Though it should not be needed often to build the entire repository at once because we are usually concerned with a specific module.
But if we want to, we can invoke the below command from the root of the repository if we want to build the entire repository with only Unit Tests enabled:
`mvn clean install -Pdefault-first,default-second,default-heavy`
or if we want to build the entire repository with Integration Tests enabled, we can do:
`mvn clean install -Pintegration-lite-first,integration-lite-second,integration-heavy`
Building a single module
@ -46,8 +74,18 @@ When you're working with an individual module, there's no need to import all of
Running Tests
=============
The command `mvn clean install` will run the unit tests in a module.
To run the integration tests, use the command `mvn clean install -Pintegration-lite-first`
The command `mvn clean install` from within a module will run the unit tests in that module.
For Spring modules this will also run the `SpringContextTest` if present.
To run the integration tests, use the command:
`mvn clean install -Pintegration-lite-first` or
`mvn clean install -Pintegration-lite-second` or
`mvn clean install -Pintegration-heavy`
depending on the list where our module exists

7
akka-http/pom.xml
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@ -1,7 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<artifactId>akka-http</artifactId>
<name>akka-http</name>

6
akka-streams/pom.xml
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@ -1,6 +1,8 @@
<?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">
<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>akka-streams</artifactId>
<name>akka-streams</name>

6
algorithms-genetic/pom.xml
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@ -1,6 +1,8 @@
<?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">
<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>algorithms-genetic</artifactId>
<version>0.0.1-SNAPSHOT</version>

6
algorithms-miscellaneous-1/pom.xml
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@ -1,6 +1,8 @@
<?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">
<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>algorithms-miscellaneous-1</artifactId>
<version>0.0.1-SNAPSHOT</version>

6
algorithms-miscellaneous-2/pom.xml
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@ -1,6 +1,8 @@
<?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">
<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>algorithms-miscellaneous-2</artifactId>
<version>0.0.1-SNAPSHOT</version>

1
algorithms-miscellaneous-3/README.md
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@ -13,6 +13,5 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
- [Checking if a Java Graph has a Cycle](https://www.baeldung.com/java-graph-has-a-cycle)
- [A Guide to the Folding Technique in Java](https://www.baeldung.com/folding-hashing-technique)
- [Creating a Triangle with for Loops in Java](https://www.baeldung.com/java-print-triangle)
- [Efficient Word Frequency Calculator in Java](https://www.baeldung.com/java-word-frequency)
- [The K-Means Clustering Algorithm in Java](https://www.baeldung.com/java-k-means-clustering-algorithm)
- More articles: [[<-- prev]](/algorithms-miscellaneous-2) [[next -->]](/algorithms-miscellaneous-4)

6
algorithms-miscellaneous-3/pom.xml
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@ -1,6 +1,8 @@
<?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">
<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>algorithms-miscellaneous-3</artifactId>
<version>0.0.1-SNAPSHOT</version>

6
algorithms-miscellaneous-4/pom.xml
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@ -1,6 +1,8 @@
<?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">
<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>algorithms-miscellaneous-4</artifactId>
<version>0.0.1-SNAPSHOT</version>

7
algorithms-miscellaneous-5/README.md
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@ -10,7 +10,10 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
- [Find If Two Numbers Are Relatively Prime in Java](https://www.baeldung.com/java-two-relatively-prime-numbers)
- [Knapsack Problem Implementation in Java](https://www.baeldung.com/java-knapsack)
- [How to Determine if a Binary Tree is Balanced](https://www.baeldung.com/java-balanced-binary-tree)
- [The Caesar Cipher in Java](https://www.baeldung.com/java-caesar-cipher)
- [Overview of Combinatorial Problems in Java](https://www.baeldung.com/java-combinatorial-algorithms)
- [Prim’s Algorithm](https://www.baeldung.com/java-prim-algorithm)
- More articles: [[<-- prev]](/../algorithms-miscellaneous-4)
- [Maximum Subarray Problem](https://www.baeldung.com/java-maximum-subarray)
- [How to Merge Two Sorted Arrays](https://www.baeldung.com/java-merge-sorted-arrays)
- [Median of Stream of Integers using Heap](https://www.baeldung.com/java-stream-integers-median-using-heap)
- More articles: [[<-- prev]](/../algorithms-miscellaneous-4) [[next -->]](/../algorithms-miscellaneous-6)

18
algorithms-miscellaneous-5/pom.xml
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@ -1,6 +1,8 @@
<?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">
<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>algorithms-miscellaneous-5</artifactId>
<version>0.0.1-SNAPSHOT</version>
@ -23,12 +25,6 @@
<artifactId>commons-math3</artifactId>
<version>${commons-math3.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>pl.allegro.finance</groupId>
<artifactId>tradukisto</artifactId>
@ -39,6 +35,11 @@
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-commons</artifactId>
<version>${junit.platform.version}</version>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
@ -66,6 +67,7 @@
<commons-codec.version>1.11</commons-codec.version>
<commons-math3.version>3.6.1</commons-math3.version>
<guava.version>28.1-jre</guava.version>
<junit.platform.version>1.6.0</junit.platform.version>
</properties>
</project>

41
algorithms-miscellaneous-5/src/test/resources/input.json Normal file
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@ -0,0 +1,41 @@
{
"nodes": 5,
"edges": 7,
"edgeList": [
{
"first": 0,
"second": 1,
"weight": 8
},
{
"first": 0,
"second": 2,
"weight": 5
},
{
"first": 1,
"second": 2,
"weight": 9
},
{
"first": 1,
"second": 3,
"weight": 11
},
{
"first": 2,
"second": 3,
"weight": 15
},
{
"first": 2,
"second": 4,
"weight": 10
},
{
"first": 3,
"second": 4,
"weight": 7
}
]
}

10
algorithms-miscellaneous-6/README.md Normal file
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@ -0,0 +1,10 @@
### Relevant Articles:
- [Boruvka’s Algorithm for Minimum Spanning Trees](https://www.baeldung.com/java-boruvka-algorithm)
- [Gradient Descent in Java](https://www.baeldung.com/java-gradient-descent)
- [Kruskal’s Algorithm for Spanning Trees](https://www.baeldung.com/java-spanning-trees-kruskal)
- [Balanced Brackets Algorithm in Java](https://www.baeldung.com/java-balanced-brackets-algorithm)
- [Efficiently Merge Sorted Java Sequences](https://www.baeldung.com/java-merge-sorted-sequences)
- [Introduction to Greedy Algorithms with Java](https://www.baeldung.com/java-greedy-algorithms)
- [The Caesar Cipher in Java](https://www.baeldung.com/java-caesar-cipher)
- More articles: [[<-- prev]](/../algorithms-miscellaneous-5)

52
algorithms-miscellaneous-6/pom.xml Normal file
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@ -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>algorithms-miscellaneous-6</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>algorithms-miscellaneous-6</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>${guava.version}</version>
</dependency>
<dependency>
<groupId>org.junit.platform</groupId>
<artifactId>junit-platform-commons</artifactId>
<version>${junit.platform.version}</version>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${org.assertj.core.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>${commons-math3.version}</version>
</dependency>
</dependencies>
<properties>
<guava.version>28.1-jre</guava.version>
<org.assertj.core.version>3.9.0</org.assertj.core.version>
<junit.platform.version>1.6.0</junit.platform.version>
<commons-math3.version>3.6.1</commons-math3.version>
</properties>
</project>

0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingDeque.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingDeque.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingString.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingString.java
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84
algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/boruvka/BoruvkaMST.java Normal file
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@ -0,0 +1,84 @@
package com.baeldung.algorithms.boruvka;
import com.google.common.graph.EndpointPair;
import com.google.common.graph.MutableValueGraph;
import com.google.common.graph.ValueGraphBuilder;
public class BoruvkaMST {
private static MutableValueGraph<Integer, Integer> mst = ValueGraphBuilder.undirected()
.build();
private static int totalWeight;
public BoruvkaMST(MutableValueGraph<Integer, Integer> graph) {
int size = graph.nodes().size();
UnionFind uf = new UnionFind(size);
// repeat at most log N times or until we have N-1 edges
for (int t = 1; t < size && mst.edges().size() < size - 1; t = t + t) {
EndpointPair<Integer>[] closestEdgeArray = new EndpointPair[size];
// foreach tree in graph, find closest edge
for (EndpointPair<Integer> edge : graph.edges()) {
int u = edge.nodeU();
int v = edge.nodeV();
int uParent = uf.find(u);
int vParent = uf.find(v);
if (uParent == vParent) {
continue; // same tree
}
int weight = graph.edgeValueOrDefault(u, v, 0);
if (closestEdgeArray[uParent] == null) {
closestEdgeArray[uParent] = edge;
}
if (closestEdgeArray[vParent] == null) {
closestEdgeArray[vParent] = edge;
}
int uParentWeight = graph.edgeValueOrDefault(closestEdgeArray[uParent].nodeU(), closestEdgeArray[uParent].nodeV(), 0);
int vParentWeight = graph.edgeValueOrDefault(closestEdgeArray[vParent].nodeU(), closestEdgeArray[vParent].nodeV(), 0);
if (weight < uParentWeight) {
closestEdgeArray[uParent] = edge;
}
if (weight < vParentWeight) {
closestEdgeArray[vParent] = edge;
}
}
// add newly discovered edges to MST
for (int i = 0; i < size; i++) {
EndpointPair<Integer> edge = closestEdgeArray[i];
if (edge != null) {
int u = edge.nodeU();
int v = edge.nodeV();
int weight = graph.edgeValueOrDefault(u, v, 0);
// don't add the same edge twice
if (uf.find(u) != uf.find(v)) {
mst.putEdgeValue(u, v, weight);
totalWeight += weight;
uf.union(u, v);
}
}
}
}
}
public MutableValueGraph<Integer, Integer> getMST() {
return mst;
}
public int getTotalWeight() {
return totalWeight;
}
public String toString() {
return "MST: " + mst.toString() + " | Total Weight: " + totalWeight;
}
}

39
algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/boruvka/UnionFind.java Normal file
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@ -0,0 +1,39 @@
package com.baeldung.algorithms.boruvka;
public class UnionFind {
private int[] parents;
private int[] ranks;
public UnionFind(int n) {
parents = new int[n];
ranks = new int[n];
for (int i = 0; i < n; i++) {
parents[i] = i;
ranks[i] = 0;
}
}
public int find(int u) {
while (u != parents[u]) {
u = parents[u];
}
return u;
}
public void union(int u, int v) {
int uParent = find(u);
int vParent = find(v);
if (uParent == vParent) {
return;
}
if (ranks[uParent] < ranks[vParent]) {
parents[uParent] = vParent;
} else if (ranks[uParent] > ranks[vParent]) {
parents[vParent] = uParent;
} else {
parents[vParent] = uParent;
ranks[uParent]++;
}
}
}

0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/caesarcipher/CaesarCipher.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/caesarcipher/CaesarCipher.java
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33
algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/gradientdescent/GradientDescent.java Normal file
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@ -0,0 +1,33 @@
package com.baeldung.algorithms.gradientdescent;
import java.util.function.Function;
public class GradientDescent {
private final double precision = 0.000001;
public double findLocalMinimum(Function<Double, Double> f, double initialX) {
double stepCoefficient = 0.1;
double previousStep = 1.0;
double currentX = initialX;
double previousX = initialX;
double previousY = f.apply(previousX);
int iter = 100;
currentX += stepCoefficient * previousY;
while (previousStep > precision && iter > 0) {
iter--;
double currentY = f.apply(currentX);
if (currentY > previousY) {
stepCoefficient = -stepCoefficient / 2;
}
previousX = currentX;
currentX += stepCoefficient * previousY;
previousY = currentY;
previousStep = StrictMath.abs(currentX - previousX);
}
return currentX;
}
}

0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/Follower.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/Follower.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/FollowersPath.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/FollowersPath.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/GreedyAlgorithm.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/GreedyAlgorithm.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/NonGreedyAlgorithm.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/NonGreedyAlgorithm.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/SocialConnector.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/SocialConnector.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/greedy/SocialUser.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/greedy/SocialUser.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/kruskal/CycleDetector.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/kruskal/CycleDetector.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/kruskal/DisjointSetInfo.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/kruskal/DisjointSetInfo.java
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0
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/kruskal/Kruskal.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/kruskal/Kruskal.java
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26
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/minheapmerge/HeapNode.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/minheapmerge/HeapNode.java
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@ -1,13 +1,13 @@
package com.baeldung.algorithms.minheapmerge;
public class HeapNode {
int element;
int arrayIndex;
int nextElementIndex = 1;
public HeapNode(int element, int arrayIndex) {
this.element = element;
this.arrayIndex = arrayIndex;
}
}
package com.baeldung.algorithms.minheapmerge;
public class HeapNode {
int element;
int arrayIndex;
int nextElementIndex = 1;
public HeapNode(int element, int arrayIndex) {
this.element = element;
this.arrayIndex = arrayIndex;
}
}

176
algorithms-miscellaneous-5/src/main/java/com/baeldung/algorithms/minheapmerge/MinHeap.java → algorithms-miscellaneous-6/src/main/java/com/baeldung/algorithms/minheapmerge/MinHeap.java
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@ -1,88 +1,88 @@
package com.baeldung.algorithms.minheapmerge;
public class MinHeap {
HeapNode[] heapNodes;
public MinHeap(HeapNode heapNodes[]) {
this.heapNodes = heapNodes;
heapifyFromLastLeafsParent();
}
void heapifyFromLastLeafsParent() {
int lastLeafsParentIndex = getParentNodeIndex(heapNodes.length);
while (lastLeafsParentIndex >= 0) {
heapify(lastLeafsParentIndex);
lastLeafsParentIndex--;
}
}
void heapify(int index) {
int leftNodeIndex = getLeftNodeIndex(index);
int rightNodeIndex = getRightNodeIndex(index);
int smallestElementIndex = index;
if (leftNodeIndex < heapNodes.length && heapNodes[leftNodeIndex].element < heapNodes[index].element) {
smallestElementIndex = leftNodeIndex;
}
if (rightNodeIndex < heapNodes.length && heapNodes[rightNodeIndex].element < heapNodes[smallestElementIndex].element) {
smallestElementIndex = rightNodeIndex;
}
if (smallestElementIndex != index) {
swap(index, smallestElementIndex);
heapify(smallestElementIndex);
}
}
int getParentNodeIndex(int index) {
return (index - 1) / 2;
}
int getLeftNodeIndex(int index) {
return (2 * index + 1);
}
int getRightNodeIndex(int index) {
return (2 * index + 2);
}
HeapNode getRootNode() {
return heapNodes[0];
}
void heapifyFromRoot() {
heapify(0);
}
void swap(int i, int j) {
HeapNode temp = heapNodes[i];
heapNodes[i] = heapNodes[j];
heapNodes[j] = temp;
}
static int[] merge(int[][] array) {
HeapNode[] heapNodes = new HeapNode[array.length];
int resultingArraySize = 0;
for (int i = 0; i < array.length; i++) {
HeapNode node = new HeapNode(array[i][0], i);
heapNodes[i] = node;
resultingArraySize += array[i].length;
}
MinHeap minHeap = new MinHeap(heapNodes);
int[] resultingArray = new int[resultingArraySize];
for (int i = 0; i < resultingArraySize; i++) {
HeapNode root = minHeap.getRootNode();
resultingArray[i] = root.element;
if (root.nextElementIndex < array[root.arrayIndex].length) {
root.element = array[root.arrayIndex][root.nextElementIndex++];
} else {
root.element = Integer.MAX_VALUE;
}
minHeap.heapifyFromRoot();
}
return resultingArray;
}
}
package com.baeldung.algorithms.minheapmerge;
public class MinHeap {
HeapNode[] heapNodes;
public MinHeap(HeapNode heapNodes[]) {
this.heapNodes = heapNodes;
heapifyFromLastLeafsParent();
}
void heapifyFromLastLeafsParent() {
int lastLeafsParentIndex = getParentNodeIndex(heapNodes.length);
while (lastLeafsParentIndex >= 0) {
heapify(lastLeafsParentIndex);
lastLeafsParentIndex--;
}
}
void heapify(int index) {
int leftNodeIndex = getLeftNodeIndex(index);
int rightNodeIndex = getRightNodeIndex(index);
int smallestElementIndex = index;
if (leftNodeIndex < heapNodes.length && heapNodes[leftNodeIndex].element < heapNodes[index].element) {
smallestElementIndex = leftNodeIndex;
}
if (rightNodeIndex < heapNodes.length && heapNodes[rightNodeIndex].element < heapNodes[smallestElementIndex].element) {
smallestElementIndex = rightNodeIndex;
}
if (smallestElementIndex != index) {
swap(index, smallestElementIndex);
heapify(smallestElementIndex);
}
}
int getParentNodeIndex(int index) {
return (index - 1) / 2;
}
int getLeftNodeIndex(int index) {
return (2 * index + 1);
}
int getRightNodeIndex(int index) {
return (2 * index + 2);
}
HeapNode getRootNode() {
return heapNodes[0];
}
void heapifyFromRoot() {
heapify(0);
}
void swap(int i, int j) {
HeapNode temp = heapNodes[i];
heapNodes[i] = heapNodes[j];
heapNodes[j] = temp;
}
static int[] merge(int[][] array) {
HeapNode[] heapNodes = new HeapNode[array.length];
int resultingArraySize = 0;
for (int i = 0; i < array.length; i++) {
HeapNode node = new HeapNode(array[i][0], i);
heapNodes[i] = node;
resultingArraySize += array[i].length;
}
MinHeap minHeap = new MinHeap(heapNodes);
int[] resultingArray = new int[resultingArraySize];
for (int i = 0; i < resultingArraySize; i++) {
HeapNode root = minHeap.getRootNode();
resultingArray[i] = root.element;
if (root.nextElementIndex < array[root.arrayIndex].length) {
root.element = array[root.arrayIndex][root.nextElementIndex++];
} else {
root.element = Integer.MAX_VALUE;
}
minHeap.heapifyFromRoot();
}
return resultingArray;
}
}

0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingDequeUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingDequeUnitTest.java
View File

0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingStringUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/balancedbrackets/BalancedBracketsUsingStringUnitTest.java
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37
algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/boruvka/BoruvkaUnitTest.java Normal file
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@ -0,0 +1,37 @@
package com.baeldung.algorithms.boruvka;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.Before;
import org.junit.Test;
import com.google.common.graph.MutableValueGraph;
import com.google.common.graph.ValueGraphBuilder;
public class BoruvkaUnitTest {
private MutableValueGraph<Integer, Integer> graph;
@Before
public void setup() {
graph = ValueGraphBuilder.undirected()
.build();
graph.putEdgeValue(0, 1, 8);
graph.putEdgeValue(0, 2, 5);
graph.putEdgeValue(1, 2, 9);
graph.putEdgeValue(1, 3, 11);
graph.putEdgeValue(2, 3, 15);
graph.putEdgeValue(2, 4, 10);
graph.putEdgeValue(3, 4, 7);
}
@Test
public void givenInputGraph_whenBoruvkaPerformed_thenMinimumSpanningTree() {
BoruvkaMST boruvkaMST = new BoruvkaMST(graph);
MutableValueGraph<Integer, Integer> mst = boruvkaMST.getMST();
assertEquals(30, boruvkaMST.getTotalWeight());
assertEquals(4, mst.edges().size());
}
}

0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/caesarcipher/CaesarCipherUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/caesarcipher/CaesarCipherUnitTest.java
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20
algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/gradientdescent/GradientDescentUnitTest.java Normal file
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@ -0,0 +1,20 @@
package com.baeldung.algorithms.gradientdescent;
import static org.junit.Assert.assertTrue;
import java.util.function.Function;
import org.junit.Test;
public class GradientDescentUnitTest {
@Test
public void givenFunction_whenStartingPointIsOne_thenLocalMinimumIsFound() {
Function<Double, Double> df = x ->
StrictMath.abs(StrictMath.pow(x, 3)) - (3 * StrictMath.pow(x, 2)) + x;
GradientDescent gd = new GradientDescent();
double res = gd.findLocalMinimum(df, 1);
assertTrue(res > 1.78);
assertTrue(res < 1.84);
}
}

0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/greedy/GreedyAlgorithmUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/greedy/GreedyAlgorithmUnitTest.java
View File

0
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/kruskal/KruskalUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/kruskal/KruskalUnitTest.java
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44
algorithms-miscellaneous-5/src/test/java/com/baeldung/algorithms/minheapmerge/MinHeapUnitTest.java → algorithms-miscellaneous-6/src/test/java/com/baeldung/algorithms/minheapmerge/MinHeapUnitTest.java
View File

@ -1,22 +1,22 @@
package com.baeldung.algorithms.minheapmerge;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import org.junit.Test;
public class MinHeapUnitTest {
private final int[][] inputArray = { { 0, 6 }, { 1, 5, 10, 100 }, { 2, 4, 200, 650 } };
private final int[] expectedArray = { 0, 1, 2, 4, 5, 6, 10, 100, 200, 650 };
@Test
public void givenSortedArrays_whenMerged_thenShouldReturnASingleSortedarray() {
int[] resultArray = MinHeap.merge(inputArray);
assertThat(resultArray.length, is(equalTo(10)));
assertThat(resultArray, is(equalTo(expectedArray)));
}
}
package com.baeldung.algorithms.minheapmerge;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
import org.junit.Test;
public class MinHeapUnitTest {
private final int[][] inputArray = { { 0, 6 }, { 1, 5, 10, 100 }, { 2, 4, 200, 650 } };
private final int[] expectedArray = { 0, 1, 2, 4, 5, 6, 10, 100, 200, 650 };
@Test
public void givenSortedArrays_whenMerged_thenShouldReturnASingleSortedarray() {
int[] resultArray = MinHeap.merge(inputArray);
assertThat(resultArray.length, is(equalTo(10)));
assertThat(resultArray, is(equalTo(expectedArray)));
}
}

1
algorithms-searching/README.md
View File

@ -10,3 +10,4 @@ This module contains articles about searching algorithms.
- [String Search Algorithms for Large Texts](https://www.baeldung.com/java-full-text-search-algorithms)
- [Monte Carlo Tree Search for Tic-Tac-Toe Game](https://www.baeldung.com/java-monte-carlo-tree-search)
- [Range Search Algorithm in Java](https://www.baeldung.com/java-range-search)
- [Fast Pattern Matching of Strings Using Suffix Tree](https://www.baeldung.com/java-pattern-matching-suffix-tree)

6
algorithms-searching/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>algorithms-searching</artifactId>
<version>0.0.1-SNAPSHOT</version>

57
algorithms-searching/src/main/java/com/baeldung/algorithms/suffixtree/Node.java Normal file
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@ -0,0 +1,57 @@
package com.baeldung.algorithms.suffixtree;
import java.util.ArrayList;
import java.util.List;
public class Node {
private String text;
private List<Node> children;
private int position;
public Node(String word, int position) {
this.text = word;
this.position = position;
this.children = new ArrayList<>();
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public int getPosition() {
return position;
}
public void setPosition(int position) {
this.position = position;
}
public List<Node> getChildren() {
return children;
}
public void setChildren(List<Node> children) {
this.children = children;
}
public String printTree(String depthIndicator) {
String str = "";
String positionStr = position > -1 ? "[" + String.valueOf(position) + "]" : "";
str += depthIndicator + text + positionStr + "\n";
for (int i = 0; i < children.size(); i++) {
str += children.get(i)
.printTree(depthIndicator + "\t");
}
return str;
}
@Override
public String toString() {
return printTree("");
}
}

175
algorithms-searching/src/main/java/com/baeldung/algorithms/suffixtree/SuffixTree.java Normal file
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@ -0,0 +1,175 @@
package com.baeldung.algorithms.suffixtree;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SuffixTree {
private static final Logger LOGGER = LoggerFactory.getLogger(SuffixTree.class);
private static final String WORD_TERMINATION = "$";
private static final int POSITION_UNDEFINED = -1;
private Node root;
private String fullText;
public SuffixTree(String text) {
root = new Node("", POSITION_UNDEFINED);
for (int i = 0; i < text.length(); i++) {
addSuffix(text.substring(i) + WORD_TERMINATION, i);
}
fullText = text;
}
public List<String> searchText(String pattern) {
LOGGER.info("Searching for pattern \"{}\"", pattern);
List<String> result = new ArrayList<>();
List<Node> nodes = getAllNodesInTraversePath(pattern, root, false);
if (nodes.size() > 0) {
Node lastNode = nodes.get(nodes.size() - 1);
if (lastNode != null) {
List<Integer> positions = getPositions(lastNode);
positions = positions.stream()
.sorted()
.collect(Collectors.toList());
positions.forEach(m -> result.add((markPatternInText(m, pattern))));
}
}
return result;
}
private void addSuffix(String suffix, int position) {
LOGGER.info(">>>>>>>>>>>> Adding new suffix {}", suffix);
List<Node> nodes = getAllNodesInTraversePath(suffix, root, true);
if (nodes.size() == 0) {
addChildNode(root, suffix, position);
LOGGER.info("{}", printTree());
} else {
Node lastNode = nodes.remove(nodes.size() - 1);
String newText = suffix;
if (nodes.size() > 0) {
String existingSuffixUptoLastNode = nodes.stream()
.map(a -> a.getText())
.reduce("", String::concat);
// Remove prefix from newText already included in parent
newText = newText.substring(existingSuffixUptoLastNode.length());
}
extendNode(lastNode, newText, position);
LOGGER.info("{}", printTree());
}
}
private List<Integer> getPositions(Node node) {
List<Integer> positions = new ArrayList<>();
if (node.getText()
.endsWith(WORD_TERMINATION)) {
positions.add(node.getPosition());
}
for (int i = 0; i < node.getChildren()
.size(); i++) {
positions.addAll(getPositions(node.getChildren()
.get(i)));
}
return positions;
}
private String markPatternInText(Integer startPosition, String pattern) {
String matchingTextLHS = fullText.substring(0, startPosition);
String matchingText = fullText.substring(startPosition, startPosition + pattern.length());
String matchingTextRHS = fullText.substring(startPosition + pattern.length());
return matchingTextLHS + "[" + matchingText + "]" + matchingTextRHS;
}
private void addChildNode(Node parentNode, String text, int position) {
parentNode.getChildren()
.add(new Node(text, position));
}
private void extendNode(Node node, String newText, int position) {
String currentText = node.getText();
String commonPrefix = getLongestCommonPrefix(currentText, newText);
if (commonPrefix != currentText) {
String parentText = currentText.substring(0, commonPrefix.length());
String childText = currentText.substring(commonPrefix.length());
splitNodeToParentAndChild(node, parentText, childText);
}
String remainingText = newText.substring(commonPrefix.length());
addChildNode(node, remainingText, position);
}
private void splitNodeToParentAndChild(Node parentNode, String parentNewText, String childNewText) {
Node childNode = new Node(childNewText, parentNode.getPosition());
if (parentNode.getChildren()
.size() > 0) {
while (parentNode.getChildren()
.size() > 0) {
childNode.getChildren()
.add(parentNode.getChildren()
.remove(0));
}
}
parentNode.getChildren()
.add(childNode);
parentNode.setText(parentNewText);
parentNode.setPosition(POSITION_UNDEFINED);
}
private String getLongestCommonPrefix(String str1, String str2) {
int compareLength = Math.min(str1.length(), str2.length());
for (int i = 0; i < compareLength; i++) {
if (str1.charAt(i) != str2.charAt(i)) {
return str1.substring(0, i);
}
}
return str1.substring(0, compareLength);
}
private List<Node> getAllNodesInTraversePath(String pattern, Node startNode, boolean isAllowPartialMatch) {
List<Node> nodes = new ArrayList<>();
for (int i = 0; i < startNode.getChildren()
.size(); i++) {
Node currentNode = startNode.getChildren()
.get(i);
String nodeText = currentNode.getText();
if (pattern.charAt(0) == nodeText.charAt(0)) {
if (isAllowPartialMatch && pattern.length() <= nodeText.length()) {
nodes.add(currentNode);
return nodes;
}
int compareLength = Math.min(nodeText.length(), pattern.length());
for (int j = 1; j < compareLength; j++) {
if (pattern.charAt(j) != nodeText.charAt(j)) {
if (isAllowPartialMatch) {
nodes.add(currentNode);
}
return nodes;
}
}
nodes.add(currentNode);
if (pattern.length() > compareLength) {
List<Node> nodes2 = getAllNodesInTraversePath(pattern.substring(compareLength), currentNode, isAllowPartialMatch);
if (nodes2.size() > 0) {
nodes.addAll(nodes2);
} else if (!isAllowPartialMatch) {
nodes.add(null);
}
}
return nodes;
}
}
return nodes;
}
public String printTree() {
return root.printTree("");
}
}

77
algorithms-searching/src/test/java/com/baeldung/algorithms/suffixtree/SuffixTreeUnitTest.java Normal file
View File

@ -0,0 +1,77 @@
package com.baeldung.algorithms.suffixtree;
import java.util.List;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SuffixTreeUnitTest {
private static final Logger LOGGER = LoggerFactory.getLogger(SuffixTreeUnitTest.class);
private static SuffixTree suffixTree;
@BeforeClass
public static void setUp() {
suffixTree = new SuffixTree("havanabanana");
printTree();
}
@Test
public void givenSuffixTree_whenSearchingForA_thenReturn6Matches() {
List<String> matches = suffixTree.searchText("a");
matches.stream()
.forEach(m -> LOGGER.info(m));
Assert.assertArrayEquals(new String[] { "h[a]vanabanana", "hav[a]nabanana", "havan[a]banana", "havanab[a]nana", "havanaban[a]na", "havanabanan[a]" }, matches.toArray());
}
@Test
public void givenSuffixTree_whenSearchingForNab_thenReturn1Match() {
List<String> matches = suffixTree.searchText("nab");
matches.stream()
.forEach(m -> LOGGER.info(m));
Assert.assertArrayEquals(new String[] { "hava[nab]anana" }, matches.toArray());
}
@Test
public void givenSuffixTree_whenSearchingForNag_thenReturnNoMatches() {
List<String> matches = suffixTree.searchText("nag");
matches.stream()
.forEach(m -> LOGGER.info(m));
Assert.assertArrayEquals(new String[] {}, matches.toArray());
}
@Test
public void givenSuffixTree_whenSearchingForBanana_thenReturn2Matches() {
List<String> matches = suffixTree.searchText("ana");
matches.stream()
.forEach(m -> LOGGER.info(m));
Assert.assertArrayEquals(new String[] { "hav[ana]banana", "havanab[ana]na", "havanaban[ana]" }, matches.toArray());
}
@Test
public void givenSuffixTree_whenSearchingForNa_thenReturn4Matches() {
List<String> matches = suffixTree.searchText("na");
matches.stream()
.forEach(m -> LOGGER.info(m));
Assert.assertArrayEquals(new String[] { "hava[na]banana", "havanaba[na]na", "havanabana[na]" }, matches.toArray());
}
@Test
public void givenSuffixTree_whenSearchingForX_thenReturnNoMatches() {
List<String> matches = suffixTree.searchText("x");
matches.stream()
.forEach(m -> LOGGER.info(m));
Assert.assertArrayEquals(new String[] {}, matches.toArray());
}
private static void printTree() {
suffixTree.printTree();
LOGGER.info("\n" + suffixTree.printTree());
LOGGER.info("==============================================");
}
}

7
algorithms-sorting-2/README.md Normal file
View File

@ -0,0 +1,7 @@
### Relevant Articles:
- [Sorting a String Alphabetically in Java](https://www.baeldung.com/java-sort-string-alphabetically)
- [Sorting Strings by Contained Numbers in Java](https://www.baeldung.com/java-sort-strings-contained-numbers)
- [How an In-Place Sorting Algorithm Works](https://www.baeldung.com/java-in-place-sorting)
- [Partitioning and Sorting Arrays with Many Repeated Entries](https://www.baeldung.com/java-sorting-arrays-with-repeated-entries)
- More articles: [[<-- prev]](/algorithms-sorting)

6
algorithms-sorting-2/pom.xml
View File

@ -1,5 +1,7 @@
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<project
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://maven.apache.org/POM/4.0.0"
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>algorithms-sorting-2</artifactId>
<version>0.0.1-SNAPSHOT</version>

2
algorithms-sorting/src/main/java/com/baeldung/algorithms/sort/bynumber/NaturalOrderComparators.java → algorithms-sorting-2/src/main/java/com/baeldung/algorithms/bynumber/NaturalOrderComparators.java
View File

@ -1,4 +1,4 @@
package com.baeldung.algorithms.sort.bynumber;
package com.baeldung.algorithms.bynumber;
import java.util.Comparator;

0
algorithms-sorting/src/main/java/com/baeldung/algorithms/inoutsort/InOutSort.java → algorithms-sorting-2/src/main/java/com/baeldung/algorithms/inoutsort/InOutSort.java
View File

0
algorithms-sorting/src/main/java/com/baeldung/algorithms/stringsort/AnagramValidator.java → algorithms-sorting-2/src/main/java/com/baeldung/algorithms/stringsort/AnagramValidator.java
View File

3
algorithms-sorting/src/test/java/com/baeldung/algorithms/sort/bynumber/NaturalOrderComparatorsUnitTest.java → algorithms-sorting-2/src/test/java/com/baeldung/algorithms/bynumber/NaturalOrderComparatorsUnitTest.java
View File

@ -1,6 +1,5 @@
package com.baeldung.algorithms.sort.bynumber;
package com.baeldung.algorithms.bynumber;
import com.baeldung.algorithms.sort.bynumber.NaturalOrderComparators;
import org.junit.Test;
import java.util.ArrayList;

0
algorithms-sorting/src/test/java/com/baeldung/algorithms/inoutsort/InOutSortUnitTest.java → algorithms-sorting-2/src/test/java/com/baeldung/algorithms/inoutsort/InOutSortUnitTest.java
View File

0
algorithms-sorting/src/test/java/com/baeldung/algorithms/stringsort/AnagramValidatorUnitTest.java → algorithms-sorting-2/src/test/java/com/baeldung/algorithms/stringsort/AnagramValidatorUnitTest.java
View File

0
algorithms-sorting/src/test/java/com/baeldung/algorithms/stringsort/SortStringUnitTest.java → algorithms-sorting-2/src/test/java/com/baeldung/algorithms/stringsort/SortStringUnitTest.java
View File

5
algorithms-sorting/README.md
View File

@ -11,10 +11,7 @@ This module contains articles about sorting algorithms.
- [Heap Sort in Java](https://www.baeldung.com/java-heap-sort)
- [Shell Sort in Java](https://www.baeldung.com/java-shell-sort)
- [Counting Sort in Java](https://www.baeldung.com/java-counting-sort)
- [Sorting Strings by Contained Numbers in Java](https://www.baeldung.com/java-sort-strings-contained-numbers)
- [How an In-Place Sorting Algorithm Works](https://www.baeldung.com/java-in-place-sorting)
- [Selection Sort in Java](https://www.baeldung.com/java-selection-sort)
- [Sorting Strings by Contained Numbers in Java](https://www.baeldung.com/java-sort-strings-contained-numbers)
- [Radix Sort in Java](https://www.baeldung.com/java-radix-sort)
- [Sorting a String Alphabetically in Java](https://www.baeldung.com/java-sort-string-alphabetically)
- [Bucket Sort in Java](https://www.baeldung.com/java-bucket-sort)
- More articles: [[next -->]](/algorithms-sorintg-2)

6
algorithms-sorting/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>algorithms-sorting</artifactId>
<version>0.0.1-SNAPSHOT</version>

8
animal-sniffer-mvn-plugin/pom.xml
View File

@ -1,6 +1,8 @@
<?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/maven-v4_0_0.xsd">
<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>
<artifactId>animal-sniffer-mvn-plugin</artifactId>
<version>1.0-SNAPSHOT</version>
@ -44,5 +46,5 @@
<animal-sniffer-maven-plugin.version>1.16</animal-sniffer-maven-plugin.version>
<org.codehaus.mojo.signature.java16.version>1.0</org.codehaus.mojo.signature.java16.version>
</properties>
</project>

6
annotations/annotation-processing/pom.xml
View File

@ -1,6 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<project
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://maven.apache.org/POM/4.0.0"
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>annotation-processing</artifactId>
<name>annotation-processing</name>

6
annotations/annotation-user/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>annotation-user</artifactId>
<name>annotation-user</name>

6
annotations/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>annotations</artifactId>
<name>annotations</name>

8
antlr/pom.xml
View File

@ -1,6 +1,8 @@
<?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/maven-v4_0_0.xsd">
<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>
<artifactId>antlr</artifactId>
<name>antlr</name>
@ -58,5 +60,5 @@
<antlr.version>4.7.1</antlr.version>
<mojo.version>3.0.0</mojo.version>
</properties>
</project>

7
apache-avro/pom.xml
View File

@ -1,7 +1,8 @@
<?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">
<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>apache-avro</artifactId>
<version>0.0.1-SNAPSHOT</version>

3
apache-beam/README.md Normal file
View File

@ -0,0 +1,3 @@
### Relevant Articles:
- [Introduction to Apache Beam](https://www.baeldung.com/apache-beam)

43
apache-beam/pom.xml Normal file
View File

@ -0,0 +1,43 @@
<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>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<groupId>com.baeldung.apache</groupId>
<artifactId>apache-beam</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-sdks-java-core</artifactId>
<version>${beam.version}</version>
</dependency>
<!-- runtime scoped -->
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-runners-direct-java</artifactId>
<version>${beam.version}</version>
<scope>runtime</scope>
</dependency>
<!-- test scoped -->
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<beam.version>2.19.0</beam.version>
<assertj.version>3.6.1</assertj.version>
</properties>
</project>

71
apache-beam/src/main/java/com/baeldung/apache/beam/intro/WordCount.java Normal file
View File

@ -0,0 +1,71 @@
package com.baeldung.apache.beam.intro;
import java.util.Arrays;
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.io.TextIO;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.transforms.Count;
import org.apache.beam.sdk.transforms.Filter;
import org.apache.beam.sdk.transforms.FlatMapElements;
import org.apache.beam.sdk.transforms.MapElements;
import org.apache.beam.sdk.values.KV;
import org.apache.beam.sdk.values.PCollection;
import org.apache.beam.sdk.values.TypeDescriptors;
public class WordCount {
public static boolean wordCount(String inputFilePath, String outputFilePath) {
// We use default options
PipelineOptions options = PipelineOptionsFactory.create();
// to create the pipeline
Pipeline p = Pipeline.create(options);
// Here is our workflow graph
PCollection<KV<String, Long>> wordCount = p
.apply("(1) Read all lines", TextIO.read().from(inputFilePath))
.apply("(2) Flatmap to a list of words", FlatMapElements.into(TypeDescriptors.strings())
.via(line -> Arrays.asList(line.split("\\s"))))
.apply("(3) Lowercase all", MapElements.into(TypeDescriptors.strings())
.via(word -> word.toLowerCase()))
.apply("(4) Trim punctuations", MapElements.into(TypeDescriptors.strings())
.via(word -> trim(word)))
.apply("(5) Filter stopwords", Filter.by(word -> !isStopWord(word)))
.apply("(6) Count words", Count.perElement());
// We convert the PCollection to String so that we can write it to file
wordCount.apply(MapElements.into(TypeDescriptors.strings())
.via(count -> count.getKey() + " --> " + count.getValue()))
.apply(TextIO.write().to(outputFilePath));
// Finally we must run the pipeline, otherwise it's only a definition
p.run().waitUntilFinish();
return true;
}
public static boolean isStopWord(String word) {
String[] stopwords = {"am", "are", "is", "i", "you", "me",
"he", "she", "they", "them", "was",
"were", "from", "in", "of", "to", "be",
"him", "her", "us", "and", "or"};
for (String stopword : stopwords) {
if (stopword.compareTo(word) == 0) {
return true;
}
}
return false;
}
public static String trim(String word) {
return word.replace("(","")
.replace(")", "")
.replace(",", "")
.replace(".", "")
.replace("\"", "")
.replace("'", "")
.replace(":", "")
.replace(";", "")
.replace("-", "")
.replace("?", "")
.replace("!", "");
}
}

19
apache-beam/src/test/java/com/baeldung/apache/beam/intro/WordCountUnitTest.java Normal file
View File

@ -0,0 +1,19 @@
package com.baeldung.apache.beam.intro;
import static org.junit.Assert.assertTrue;
import org.junit.Ignore;
import org.junit.Test;
import com.baeldung.apache.beam.intro.WordCount;
public class WordCountUnitTest {
@Test
// @Ignore
public void givenInputFile_whenWordCountRuns_thenJobFinishWithoutError() {
boolean jobDone = WordCount.wordCount("src/test/resources/wordcount.txt", "target/output");
assertTrue(jobDone);
}
}

16
apache-beam/src/test/resources/wordcount.txt Normal file
View File

@ -0,0 +1,16 @@
We've all heard the scare stories about North Korea: the homemade nuclear arsenal built while their people starve and then aimed imprecisely at the rest of the world, a
leader so deluded he makes L Ron Hubbard look like a man excessively overburdened with self-doubt and their deep-seated belief that foreign capitalists will invade at any
moment and steal all their bauxite.
The popular portrayal of this Marxist nation is something like one of the more harrowing episodes of M*A*S*H, only with the cast of wacky characters replaced by twitchy,
heavily armed Stalinist meth addicts
Cracked would like to take a moment to celebrate the good things about North Korea though, the things that the country's enemies prefer to suppress as part of their politically
motivated jealousy. Like how no different to you and me, there's nothing every North Korean likes more after an 18 hour shift at the phosphorus plant than a nice beer to go with
his dried fish ration. Ever attentive to its people's needs and in the twinkling of a decade, North Korea's leadership bought, disassembled, transported and rebuilt a British
brewery in order to discover and reproduce the secrets of beer and then brew the sweet nectar for its hardworking people, up to 18 bottles at a time. And with minimal fatalities.
When was the last time YOUR leader got a beer for YOU, American? (NB do not answer this question if you are Henry Louis Gates).
Or how about the fried chicken restaurant that downtown Pyongyang boasts? Yes real chicken, fried and then delivered to your sleeping cube, with optional beer if you like! You
don't even have to remove the feathers or pull out the gizzard yourself. Mostly. Americans must eat their fried chicken from a bucket, like swine, sold by a company so secretive
that even the very blend of seasoning used is intentionally kept from them. And they call North Korea paranoid?
And how many nations would entertain the syphilitic, bourgeois ramblings of Bill Clinton let alone permit him anywhere near their proud womenfolk? Only wise Kim Jong Il could see
past Bill's many, many imperfections and treat him with the pity and kindness he deserves, accepting his feeble pleas to pardon the American spies rightly convicted of photographing
the nation's sensitive beetroot fields.

6
apache-bval/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-bval</artifactId>
<version>0.0.1-SNAPSHOT</version>

6
apache-curator/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-curator</artifactId>
<version>0.0.1-SNAPSHOT</version>

3
apache-cxf/cxf-aegis/README.md
View File

@ -1,3 +0,0 @@
### Relevant Articles
- [Introduction to Apache CXF Aegis Data Binding](https://www.baeldung.com/aegis-data-binding-in-apache-cxf)

6
apache-cxf/cxf-aegis/pom.xml
View File

@ -1,6 +1,8 @@
<?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/maven-v4_0_0.xsd">
<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>
<artifactId>cxf-aegis</artifactId>
<name>cxf-aegis</name>

6
apache-cxf/cxf-introduction/pom.xml
View File

@ -1,6 +1,8 @@
<?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/maven-v4_0_0.xsd">
<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>
<artifactId>cxf-introduction</artifactId>
<name>cxf-introduction</name>

6
apache-cxf/cxf-jaxrs-implementation/pom.xml
View File

@ -1,6 +1,8 @@
<?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/maven-v4_0_0.xsd">
<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>
<artifactId>cxf-jaxrs-implementation</artifactId>
<name>cxf-jaxrs-implementation</name>

6
apache-cxf/cxf-spring/pom.xml
View File

@ -1,6 +1,8 @@
<?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/maven-v4_0_0.xsd">
<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>
<artifactId>cxf-spring</artifactId>
<name>cxf-spring</name>

6
apache-cxf/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-cxf</artifactId>
<version>0.0.1-SNAPSHOT</version>

7
apache-cxf/sse-jaxrs/pom.xml
View File

@ -1,7 +1,8 @@
<?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">
<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>sse-jaxrs</artifactId>
<name>sse-jaxrs</name>

7
apache-cxf/sse-jaxrs/sse-jaxrs-client/pom.xml
View File

@ -1,7 +1,8 @@
<?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">
<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>sse-jaxrs-client</artifactId>
<name>sse-jaxrs-client</name>

9
apache-cxf/sse-jaxrs/sse-jaxrs-server/pom.xml
View File

@ -1,12 +1,13 @@
<?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">
<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>sse-jaxrs-server</artifactId>
<name>sse-jaxrs-server</name>
<packaging>war</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>sse-jaxrs</artifactId>

5
apache-fop/README.md
View File

@ -1,5 +0,0 @@
## Apache FOP
This module contains articles about Apache FOP
### Relevant Articles:

6
apache-fop/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-fop</artifactId>
<version>0.1-SNAPSHOT</version>

7
apache-geode/pom.xml
View File

@ -1,7 +1,8 @@
<?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">
<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>apache-geode</artifactId>
<version>1.0-SNAPSHOT</version>

6
apache-meecrowave/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-meecrowave</artifactId>
<version>0.0.1</version>

4
apache-olingo/olingo2/README.md
View File

@ -1,4 +0,0 @@
### Relevant Articles:
- [OData Protocol Guide](https://www.baeldung.com/odata)
- [Intro to OData with Olingo](https://www.baeldung.com/olingo)

7
apache-olingo/olingo2/pom.xml
View File

@ -1,7 +1,8 @@
<?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">
<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.examples.olingo2</groupId>
<artifactId>olingo2</artifactId>

6
apache-opennlp/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-opennlp</artifactId>
<version>1.0-SNAPSHOT</version>

3
apache-poi/README.md
View File

@ -6,3 +6,6 @@ This module contains articles about Apache POI
- [Microsoft Word Processing in Java with Apache POI](https://www.baeldung.com/java-microsoft-word-with-apache-poi)
- [Working with Microsoft Excel in Java](https://www.baeldung.com/java-microsoft-excel)
- [Creating a MS PowerPoint Presentation in Java](https://www.baeldung.com/apache-poi-slideshow)
- [Merge Cells in Excel Using Apache POI](https://www.baeldung.com/java-apache-poi-merge-cells)
- [Get String Value of Excel Cell with Apache POI](https://www.baeldung.com/java-apache-poi-cell-string-value)
- [Read Excel Cell Value Rather Than Formula With Apache POI](https://www.baeldung.com/apache-poi-read-cell-value-formula)

6
apache-poi/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-poi</artifactId>
<version>0.0.1-SNAPSHOT</version>

2
apache-poi/src/test/java/com/baeldung/poi/excel/ExcelCellMergerUnitTest.java → apache-poi/src/test/java/com/baeldung/poi/excel/merge/ExcelCellMergerUnitTest.java
View File

@ -1,4 +1,4 @@
package com.baeldung.poi.excel;
package com.baeldung.poi.excel.merge;
import static org.junit.Assert.assertEquals;

6
apache-pulsar/pom.xml
View File

@ -1,6 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung.pulsar</groupId>
<artifactId>apache-pulsar</artifactId>

2
apache-rocketmq/README.md
View File

@ -3,3 +3,5 @@
This module contains articles about Apache RocketMQ
### Relevant Articles:
- [Apache RocketMQ with Spring Boot](https://www.baeldung.com/apache-rocketmq-spring-boot)

7
apache-rocketmq/pom.xml
View File

@ -1,7 +1,8 @@
<?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">
<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>apache-rocketmq</artifactId>
<version>1.0-SNAPSHOT</version>

7
apache-shiro/pom.xml
View File

@ -1,7 +1,8 @@
<?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">
<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>apache-shiro</artifactId>
<version>1.0-SNAPSHOT</version>

6
apache-solrj/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-solrj</artifactId>
<version>0.0.1-SNAPSHOT</version>

7
apache-spark/pom.xml
View File

@ -1,7 +1,8 @@
<?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">
<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>apache-spark</artifactId>
<version>1.0-SNAPSHOT</version>

35
apache-tapestry/pom.xml
View File

@ -1,6 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0">
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://maven.apache.org/POM/4.0.0">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>apache-tapestry</artifactId>
@ -9,9 +11,8 @@
<packaging>war</packaging>
<dependencies>
<!-- To set up an application with a database, change the artifactId below to
tapestry-hibernate, and add a dependency on your JDBC driver. You'll also
need to add Hibernate configuration files, such as hibernate.cfg.xml. -->
<!-- To set up an application with a database, change the artifactId below to tapestry-hibernate,
and add a dependency on your JDBC driver. You'll also need to add Hibernate configuration files, such as hibernate.cfg.xml. -->
<dependency>
<groupId>org.apache.tapestry</groupId>
<artifactId>tapestry-core</artifactId>
@ -32,17 +33,10 @@
</dependency>
<!-- Uncomment this to add support for file uploads: -->
<!--
<dependency>
<groupId>org.apache.tapestry</groupId>
<artifactId>tapestry-upload</artifactId>
<version>${tapestry-release-version}</version>
</dependency>
-->
<!-- <dependency> <groupId>org.apache.tapestry</groupId> <artifactId>tapestry-upload</artifactId> <version>${tapestry-release-version}</version> </dependency> -->
<!-- A dependency on either JUnit or TestNG is required, or the surefire plugin (which runs the tests)
will fail, preventing Maven from packaging the WAR. Tapestry includes a large number
of testing facilities designed for use with TestNG (http://testng.org/), so it's recommended. -->
<!-- A dependency on either JUnit or TestNG is required, or the surefire plugin (which runs the tests) will fail, preventing Maven from packaging the WAR. Tapestry includes
a large number of testing facilities designed for use with TestNG (http://testng.org/), so it's recommended. -->
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
@ -57,8 +51,7 @@ of testing facilities designed for use with TestNG (http://testng.org/), so it's
<scope>test</scope>
</dependency>
<!-- Provided by the servlet container, but sometimes referenced in the application
code. -->
<!-- Provided by the servlet container, but sometimes referenced in the application code. -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
@ -108,8 +101,7 @@ of testing facilities designed for use with TestNG (http://testng.org/), so it's
<configuration>
<!-- Log to the console. -->
<requestLog implementation="org.mortbay.jetty.NCSARequestLog">
<!-- This doesn't do anything for Jetty, but is a workaround for a Maven bug
that prevents the requestLog from being set. -->
<!-- This doesn't do anything for Jetty, but is a workaround for a Maven bug that prevents the requestLog from being set. -->
<append>true</append>
</requestLog>
<systemProperties>
@ -123,7 +115,7 @@ of testing facilities designed for use with TestNG (http://testng.org/), so it's
</plugins>
</build>
<reporting/>
<reporting />
<repositories>
<repository>
@ -131,8 +123,7 @@ of testing facilities designed for use with TestNG (http://testng.org/), so it's
<url>http://repository.jboss.org/nexus/content/groups/public/</url>
</repository>
<!-- This repository is only needed when the Tapestry version is a preview release, rather
than a final release. -->
<!-- This repository is only needed when the Tapestry version is a preview release, rather than a final release. -->
<repository>
<id>apache-staging</id>
<url>https://repository.apache.org/content/groups/staging/</url>

6
apache-thrift/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-thrift</artifactId>
<version>0.0.1-SNAPSHOT</version>

6
apache-tika/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-tika</artifactId>
<version>0.0.1-SNAPSHOT</version>

6
apache-velocity/pom.xml
View File

@ -1,6 +1,8 @@
<?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/maven-v4_0_0.xsd">
<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>
<artifactId>apache-velocity</artifactId>
<version>0.1-SNAPSHOT</version>

6
apache-zookeeper/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>apache-zookeeper</artifactId>
<version>0.0.1-SNAPSHOT</version>

6
asciidoctor/pom.xml
View File

@ -1,6 +1,8 @@
<?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">
<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>asciidoctor</artifactId>
<name>asciidoctor</name>

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