Merge branch 'master' into master

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Priyesh Mashelkar 2018-09-11 13:26:12 +01:00 committed by GitHub
commit e146c2af4e
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4311 changed files with 130458 additions and 37724 deletions

20
.gitignore vendored
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@ -42,3 +42,23 @@ spring-check-if-a-property-is-null/.mvn/wrapper/maven-wrapper.properties
*.springBeans
20171220-JMeter.csv
.factorypath
dependency-reduced-pom.xml
*.so
*.dylib
*.dll
xml/src/test/resources/example_dom4j_new.xml
xml/src/test/resources/example_dom4j_updated.xml
xml/src/test/resources/example_jaxb_new.xml
core-java-io/hard_link.txt
core-java-io/target_link.txt
core-java/src/main/java/com/baeldung/manifest/MANIFEST.MF
ethereum/logs/
jmeter/src/main/resources/*-JMeter.csv
**/node_modules/
**/dist
**/tmp
**/out-tsc

3
.gitmodules vendored
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@ -1,3 +0,0 @@
[submodule "testgitrepo"]
path = testgitrepo
url = /home/prd/Development/projects/idea/tutorials/spring-boot/src/main/resources/testgitrepo/

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@ -4,7 +4,7 @@ before_install:
- echo "MAVEN_OPTS='-Xmx2048M -Xss128M -XX:+CMSClassUnloadingEnabled -XX:+UseG1GC -XX:-UseGCOverheadLimit'" > ~/.mavenrc
install: skip
script: travis_wait 60 mvn -q install
script: travis_wait 60 mvn -q install -Pdefault
sudo: required

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@ -1,11 +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>
<groupId>com.baeldung</groupId>
<artifactId>JGitSnippets</artifactId>
<artifactId>JGit</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<url>http://maven.apache.org</url>
<name>JGit</name>
<parent>
<groupId>com.baeldung</groupId>
@ -45,7 +47,6 @@
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<org.eclipse.jgit.version>4.5.0.201609210915-r</org.eclipse.jgit.version>
</properties>

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@ -0,0 +1,13 @@
<?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>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

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@ -2,7 +2,7 @@
The "REST with Spring" Classes
==============================
After 5 months of work, here's the Master Class of REST With Spring: <br/>
Here's the Master Class of REST With Spring (price changes permanently next Friday): <br/>
**[>> THE REST WITH SPRING MASTER CLASS](http://www.baeldung.com/rest-with-spring-course?utm_source=github&utm_medium=social&utm_content=tutorials&utm_campaign=rws#master-class)**
And here's the Master Class of Learn Spring Security: <br/>
@ -19,7 +19,7 @@ In additional to Spring, the following technologies are in focus: `core Java`, `
Building the project
====================
To do the full build, do: `mvn install -Dgib.enabled=false`
To do the full build, do: `mvn install -Pdefault -Dgib.enabled=false`
Working with the code in Eclipse

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@ -1,6 +1,7 @@
<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">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.mabsisa</groupId>
<artifactId>Twitter4J</artifactId>
<packaging>jar</packaging>
@ -14,17 +15,11 @@
<version>1.0.0-SNAPSHOT</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-stream</artifactId>
<version>4.0.6</version>
<version>${twitter4j-stream.version}</version>
</dependency>
</dependencies>
@ -49,4 +44,8 @@
</plugins>
</build>
<properties>
<twitter4j-stream.version>4.0.6</twitter4j-stream.version>
</properties>
</project>

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@ -0,0 +1,13 @@
<?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>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

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@ -1,5 +1,5 @@
<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">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>activejdbc</artifactId>
@ -15,12 +15,6 @@
</parent>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.javalite</groupId>
<artifactId>activejdbc</artifactId>
@ -133,10 +127,8 @@
</pluginRepositories>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<activejdbc.version>1.4.13</activejdbc.version>
<environments>development.test,development</environments>
<org.slf4j.version>1.7.9</org.slf4j.version>
<mysql.connector.version>5.1.34</mysql.connector.version>
</properties>

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@ -0,0 +1,13 @@
<?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>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

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@ -1,6 +1,6 @@
<?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">
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>

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@ -0,0 +1,13 @@
<?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>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

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@ -5,7 +5,6 @@
- [Ant Colony Optimization](http://www.baeldung.com/java-ant-colony-optimization)
- [Validating Input With Finite Automata in Java](http://www.baeldung.com/java-finite-automata)
- [Introduction to Jenetics Library](http://www.baeldung.com/jenetics)
- [Check If a Number Is Prime in Java](http://www.baeldung.com/java-prime-numbers)
- [Example of Hill Climbing Algorithm](http://www.baeldung.com/java-hill-climbing-algorithm)
- [Monte Carlo Tree Search for Tic-Tac-Toe Game](http://www.baeldung.com/java-monte-carlo-tree-search)
- [String Search Algorithms for Large Texts](http://www.baeldung.com/java-full-text-search-algorithms)
@ -21,4 +20,7 @@
- [Create a Sudoku Solver in Java](http://www.baeldung.com/java-sudoku)
- [Displaying Money Amounts in Words](http://www.baeldung.com/java-money-into-words)
- [A Collaborative Filtering Recommendation System in Java](http://www.baeldung.com/java-collaborative-filtering-recommendations)
- [Find All Pairs of Numbers in an Array That Add Up to a Given Sum](http://www.baeldung.com/java-algorithm-number-pairs-sum)
- [Converting Between Roman and Arabic Numerals in Java](http://www.baeldung.com/java-convert-roman-arabic)
- [Practical Java Examples of the Big O Notation](http://www.baeldung.com/java-algorithm-complexity)
- [Find the Middle Element of a Linked List](http://www.baeldung.com/java-linked-list-middle-element)
- [An Introduction to the Theory of Big-O Notation](http://www.baeldung.com/big-o-notation)

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@ -1,5 +1,5 @@
<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">
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>algorithms</artifactId>
@ -79,7 +79,6 @@
</reporting>
<properties>
<exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
<lombok.version>1.16.12</lombok.version>
<commons-math3.version>3.6.1</commons-math3.version>
<tradukisto.version>1.0.1</tradukisto.version>

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@ -6,7 +6,6 @@ import com.baeldung.algorithms.ga.annealing.SimulatedAnnealing;
import com.baeldung.algorithms.ga.ant_colony.AntColonyOptimization;
import com.baeldung.algorithms.ga.binary.SimpleGeneticAlgorithm;
import com.baeldung.algorithms.slope_one.SlopeOne;
import com.baeldung.algorithms.pairsaddupnumber.FindPairs;
public class RunAlgorithm {
@ -39,12 +38,6 @@ public class RunAlgorithm {
case 5:
System.out.println("Please run the DijkstraAlgorithmTest.");
break;
case 6:
final FindPairs findPairs = new FindPairs();
final int[] input = {1, 4, 3, 2, 1, 4, 4, 3, 3};
final int sum = 6;
findPairs.execute(input, sum);
break;
default:
System.out.println("Unknown option");
break;

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@ -0,0 +1,38 @@
package com.baeldung.algorithms.distancebetweenpoints;
import java.awt.geom.Point2D;
public class DistanceBetweenPointsService {
public double calculateDistanceBetweenPoints(
double x1,
double y1,
double x2,
double y2) {
return Math.sqrt((y2 - y1) * (y2 - y1) + (x2 - x1) * (x2 - x1));
}
public double calculateDistanceBetweenPointsWithHypot(
double x1,
double y1,
double x2,
double y2) {
double ac = Math.abs(y2 - y1);
double cb = Math.abs(x2 - x1);
return Math.hypot(ac, cb);
}
public double calculateDistanceBetweenPointsWithPoint2D(
double x1,
double y1,
double x2,
double y2) {
return Point2D.distance(x1, y1, x2, y2);
}
}

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@ -0,0 +1,21 @@
package com.baeldung.algorithms.linesintersection;
import java.awt.Point;
import java.util.Optional;
public class LinesIntersectionService {
public Optional<Point> calculateIntersectionPoint(double m1, double b1, double m2, double b2) {
if (m1 == m2) {
return Optional.empty();
}
double x = (b2 - b1) / (m1 - m2);
double y = m1 * x + b1;
Point point = new Point();
point.setLocation(x, y);
return Optional.of(point);
}
}

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@ -10,7 +10,7 @@ public class MonteCarloTreeSearch {
private static final int WIN_SCORE = 10;
private int level;
private int oponent;
private int opponent;
public MonteCarloTreeSearch() {
this.level = 3;
@ -32,11 +32,11 @@ public class MonteCarloTreeSearch {
long start = System.currentTimeMillis();
long end = start + 60 * getMillisForCurrentLevel();
oponent = 3 - playerNo;
opponent = 3 - playerNo;
Tree tree = new Tree();
Node rootNode = tree.getRoot();
rootNode.getState().setBoard(board);
rootNode.getState().setPlayerNo(oponent);
rootNode.getState().setPlayerNo(opponent);
while (System.currentTimeMillis() < end) {
// Phase 1 - Selection
@ -93,7 +93,7 @@ public class MonteCarloTreeSearch {
State tempState = tempNode.getState();
int boardStatus = tempState.getBoard().checkStatus();
if (boardStatus == oponent) {
if (boardStatus == opponent) {
tempNode.getParent().getState().setWinScore(Integer.MIN_VALUE);
return boardStatus;
}

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@ -87,7 +87,7 @@ public class State {
void randomPlay() {
List<Position> availablePositions = this.board.getEmptyPositions();
int totalPossibilities = availablePositions.size();
int selectRandom = (int) (Math.random() * ((totalPossibilities - 1) + 1));
int selectRandom = (int) (Math.random() * totalPossibilities);
this.board.performMove(this.playerNo, availablePositions.get(selectRandom));
}

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@ -148,7 +148,7 @@ public class Board {
System.out.println("Game Draw");
break;
case IN_PROGRESS:
System.out.println("Game In rogress");
System.out.println("Game In Progress");
break;
}
}

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@ -65,7 +65,7 @@ public class Node {
public Node getRandomChildNode() {
int noOfPossibleMoves = this.childArray.size();
int selectRandom = (int) (Math.random() * ((noOfPossibleMoves - 1) + 1));
int selectRandom = (int) (Math.random() * noOfPossibleMoves);
return this.childArray.get(selectRandom);
}

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@ -0,0 +1,88 @@
package com.baeldung.algorithms.middleelementlookup;
import java.util.LinkedList;
import java.util.Optional;
public class MiddleElementLookup {
public static Optional<String> findMiddleElementLinkedList(LinkedList<String> linkedList) {
if (linkedList == null || linkedList.isEmpty()) {
return Optional.empty();
}
return Optional.ofNullable(linkedList.get((linkedList.size() - 1) / 2));
}
public static Optional<String> findMiddleElementFromHead(Node head) {
if (head == null) {
return Optional.empty();
}
// calculate the size of the list
Node current = head;
int size = 1;
while (current.hasNext()) {
current = current.next();
size++;
}
// iterate till the middle element
current = head;
for (int i = 0; i < (size - 1) / 2; i++) {
current = current.next();
}
return Optional.ofNullable(current.data());
}
public static Optional<String> findMiddleElementFromHead1PassRecursively(Node head) {
if (head == null) {
return Optional.empty();
}
MiddleAuxRecursion middleAux = new MiddleAuxRecursion();
findMiddleRecursively(head, middleAux);
return Optional.ofNullable(middleAux.middle.data());
}
private static void findMiddleRecursively(Node node, MiddleAuxRecursion middleAux) {
if (node == null) {
// reached the end
middleAux.length = middleAux.length / 2;
return;
}
middleAux.length++;
findMiddleRecursively(node.next(), middleAux);
if (middleAux.length == 0) {
// found the middle
middleAux.middle = node;
}
middleAux.length--;
}
public static Optional<String> findMiddleElementFromHead1PassIteratively(Node head) {
if (head == null) {
return Optional.empty();
}
Node slowPointer = head;
Node fastPointer = head;
while (fastPointer.hasNext() && fastPointer.next()
.hasNext()) {
fastPointer = fastPointer.next()
.next();
slowPointer = slowPointer.next();
}
return Optional.ofNullable(slowPointer.data());
}
private static class MiddleAuxRecursion {
Node middle;
int length = 0;
}
}

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@ -0,0 +1,34 @@
package com.baeldung.algorithms.middleelementlookup;
public class Node {
private Node next;
private String data;
public Node(String data) {
this.data = data;
}
public String data() {
return data;
}
public void setData(String data) {
this.data = data;
}
public boolean hasNext() {
return next != null;
}
public Node next() {
return next;
}
public void setNext(Node next) {
this.next = next;
}
public String toString() {
return this.data;
}
}

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@ -1,59 +0,0 @@
package com.baeldung.algorithms.prime;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
public class PrimeGenerator {
public static List<Integer> sieveOfEratosthenes(int n) {
final boolean prime[] = new boolean[n + 1];
Arrays.fill(prime, true);
for (int p = 2; p * p <= n; p++) {
if (prime[p]) {
for (int i = p * 2; i <= n; i += p)
prime[i] = false;
}
}
final List<Integer> primes = new LinkedList<>();
for (int i = 2; i <= n; i++) {
if (prime[i])
primes.add(i);
}
return primes;
}
public static List<Integer> primeNumbersBruteForce(int max) {
final List<Integer> primeNumbers = new LinkedList<Integer>();
for (int i = 2; i <= max; i++) {
if (isPrimeBruteForce(i)) {
primeNumbers.add(i);
}
}
return primeNumbers;
}
private static boolean isPrimeBruteForce(int x) {
for (int i = 2; i < x; i++) {
if (x % i == 0) {
return false;
}
}
return true;
}
public static List<Integer> primeNumbersTill(int max) {
return IntStream.rangeClosed(2, max)
.filter(x -> isPrime(x))
.boxed()
.collect(Collectors.toList());
}
private static boolean isPrime(int x) {
return IntStream.rangeClosed(2, (int) (Math.sqrt(x)))
.allMatch(n -> x % n != 0);
}
}

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

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

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@ -0,0 +1,52 @@
package com.baeldung.algorithms.romannumerals;
import java.util.List;
class RomanArabicConverter {
public static int romanToArabic(String input) {
String romanNumeral = input.toUpperCase();
int result = 0;
List<RomanNumeral> romanNumerals = RomanNumeral.getReverseSortedValues();
int i = 0;
while ((romanNumeral.length() > 0) && (i < romanNumerals.size())) {
RomanNumeral symbol = romanNumerals.get(i);
if (romanNumeral.startsWith(symbol.name())) {
result += symbol.getValue();
romanNumeral = romanNumeral.substring(symbol.name().length());
} else {
i++;
}
}
if (romanNumeral.length() > 0) {
throw new IllegalArgumentException(input + " cannot be converted to a Roman Numeral");
}
return result;
}
public static String arabicToRoman(int number) {
if ((number <= 0) || (number > 4000)) {
throw new IllegalArgumentException(number + " is not in range (0,4000]");
}
List<RomanNumeral> romanNumerals = RomanNumeral.getReverseSortedValues();
int i = 0;
StringBuilder sb = new StringBuilder();
while (number > 0 && i < romanNumerals.size()) {
RomanNumeral currentSymbol = romanNumerals.get(i);
if (currentSymbol.getValue() <= number) {
sb.append(currentSymbol.name());
number -= currentSymbol.getValue();
} else {
i++;
}
}
return sb.toString();
}
}

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@ -0,0 +1,26 @@
package com.baeldung.algorithms.romannumerals;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;
enum RomanNumeral {
I(1), IV(4), V(5), IX(9), X(10), XL(40), L(50), XC(90), C(100), CD(400), D(500), CM(900), M(1000);
private int value;
RomanNumeral(int value) {
this.value = value;
}
public int getValue() {
return value;
}
public static List<RomanNumeral> getReverseSortedValues() {
return Arrays.stream(values())
.sorted(Comparator.comparing((RomanNumeral e) -> e.value).reversed())
.collect(Collectors.toList());
}
}

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@ -0,0 +1,35 @@
package com.baeldung.algorithms.string;
public class EnglishAlphabetLetters {
public static boolean checkStringForAllTheLetters(String input) {
boolean[] visited = new boolean[26];
int index = 0;
for (int id = 0; id < input.length(); id++) {
if ('a' <= input.charAt(id) && input.charAt(id) <= 'z') {
index = input.charAt(id) - 'a';
} else if ('A' <= input.charAt(id) && input.charAt(id) <= 'Z') {
index = input.charAt(id) - 'A';
}
visited[index] = true;
}
for (int id = 0; id < 26; id++) {
if (!visited[id]) {
return false;
}
}
return true;
}
public static boolean checkStringForAllLetterUsingStream(String input) {
long c = input.toLowerCase().chars().filter(ch -> ch >= 'a' && ch <= 'z').distinct().count();
return c == 26;
}
public static void main(String[] args) {
checkStringForAllLetterUsingStream("intit");
}
}

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@ -0,0 +1,13 @@
<?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>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

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@ -1,58 +0,0 @@
package algorithms;
import com.baeldung.algorithms.hillclimbing.HillClimbing;
import com.baeldung.algorithms.hillclimbing.State;
import org.junit.Before;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.Stack;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
public class HillClimbingAlgorithmTest {
private Stack<String> initStack;
private Stack<String> goalStack;
@Before
public void initStacks() {
String blockArr[] = { "B", "C", "D", "A" };
String goalBlockArr[] = { "A", "B", "C", "D" };
initStack = new Stack<>();
for (String block : blockArr)
initStack.push(block);
goalStack = new Stack<>();
for (String block : goalBlockArr)
goalStack.push(block);
}
@Test
public void givenInitAndGoalState_whenGetPathWithHillClimbing_thenPathFound() {
HillClimbing hillClimbing = new HillClimbing();
List<State> path;
try {
path = hillClimbing.getRouteWithHillClimbing(initStack, goalStack);
assertNotNull(path);
assertEquals(path.get(path.size() - 1)
.getState()
.get(0), goalStack);
} catch (Exception e) {
e.printStackTrace();
}
}
@Test
public void givenCurrentState_whenFindNextState_thenBetterHeuristics() {
HillClimbing hillClimbing = new HillClimbing();
List<Stack<String>> initList = new ArrayList<>();
initList.add(initStack);
State currentState = new State(initList);
currentState.setHeuristics(hillClimbing.getHeuristicsValue(initList, goalStack));
State nextState = hillClimbing.findNextState(currentState, goalStack);
assertTrue(nextState.getHeuristics() > currentState.getHeuristics());
}
}

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@ -1,25 +0,0 @@
package algorithms;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.algorithms.string.search.StringSearchAlgorithms;
public class StringSearchAlgorithmsTest {
@Test
public void testStringSearchAlgorithms(){
String text = "This is some nice text.";
String pattern = "some";
int realPosition = text.indexOf(pattern);
Assert.assertTrue(realPosition == StringSearchAlgorithms.simpleTextSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.RabinKarpMethod(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.KnuthMorrisPrattSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.BoyerMooreHorspoolSimpleSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.BoyerMooreHorspoolSearch(pattern.toCharArray(), text.toCharArray()));
}
}

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@ -1,43 +0,0 @@
package algorithms.binarysearch;
import java.util.Arrays;
import java.util.List;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.algorithms.binarysearch.BinarySearch;
public class BinarySearchTest {
int[] sortedArray = { 0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9 };
int key = 6;
int expectedIndexForSearchKey = 7;
int low = 0;
int high = sortedArray.length - 1;
List<Integer> sortedList = Arrays.asList(0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9);
@Test
public void givenASortedArrayOfIntegers_whenBinarySearchRunIterativelyForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchIteratively(sortedArray, key, low, high));
}
@Test
public void givenASortedArrayOfIntegers_whenBinarySearchRunRecursivelyForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchRecursively(sortedArray, key, low, high));
}
@Test
public void givenASortedArrayOfIntegers_whenBinarySearchRunUsingArraysClassStaticMethodForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchUsingJavaArrays(sortedArray, key));
}
@Test
public void givenASortedListOfIntegers_whenBinarySearchRunUsingCollectionsClassStaticMethodForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchUsingJavaCollections(sortedList, key));
}
}

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@ -1,92 +0,0 @@
package algorithms.mcts;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import com.baeldung.algorithms.mcts.montecarlo.MonteCarloTreeSearch;
import com.baeldung.algorithms.mcts.montecarlo.State;
import com.baeldung.algorithms.mcts.montecarlo.UCT;
import com.baeldung.algorithms.mcts.tictactoe.Board;
import com.baeldung.algorithms.mcts.tictactoe.Position;
import com.baeldung.algorithms.mcts.tree.Tree;
public class MCTSTest {
private Tree gameTree;
private MonteCarloTreeSearch mcts;
@Before
public void initGameTree() {
gameTree = new Tree();
mcts = new MonteCarloTreeSearch();
}
@Test
public void givenStats_whenGetUCTForNode_thenUCTMatchesWithManualData() {
double uctValue = 15.79;
assertEquals(UCT.uctValue(600, 300, 20), uctValue, 0.01);
}
@Test
public void giveninitBoardState_whenGetAllPossibleStates_thenNonEmptyList() {
State initState = gameTree.getRoot().getState();
List<State> possibleStates = initState.getAllPossibleStates();
assertTrue(possibleStates.size() > 0);
}
@Test
public void givenEmptyBoard_whenPerformMove_thenLessAvailablePossitions() {
Board board = new Board();
int initAvailablePositions = board.getEmptyPositions().size();
board.performMove(Board.P1, new Position(1, 1));
int availablePositions = board.getEmptyPositions().size();
assertTrue(initAvailablePositions > availablePositions);
}
@Test
public void givenEmptyBoard_whenSimulateInterAIPlay_thenGameDraw() {
Board board = new Board();
int player = Board.P1;
int totalMoves = Board.DEFAULT_BOARD_SIZE * Board.DEFAULT_BOARD_SIZE;
for (int i = 0; i < totalMoves; i++) {
board = mcts.findNextMove(board, player);
if (board.checkStatus() != -1) {
break;
}
player = 3 - player;
}
int winStatus = board.checkStatus();
assertEquals(winStatus, Board.DRAW);
}
@Test
public void givenEmptyBoard_whenLevel1VsLevel3_thenLevel3WinsOrDraw() {
Board board = new Board();
MonteCarloTreeSearch mcts1 = new MonteCarloTreeSearch();
mcts1.setLevel(1);
MonteCarloTreeSearch mcts3 = new MonteCarloTreeSearch();
mcts3.setLevel(3);
int player = Board.P1;
int totalMoves = Board.DEFAULT_BOARD_SIZE * Board.DEFAULT_BOARD_SIZE;
for (int i = 0; i < totalMoves; i++) {
if (player == Board.P1)
board = mcts3.findNextMove(board, player);
else
board = mcts1.findNextMove(board, player);
if (board.checkStatus() != -1) {
break;
}
player = 3 - player;
}
int winStatus = board.checkStatus();
assertTrue(winStatus == Board.DRAW || winStatus == Board.P1);
}
}

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@ -1,36 +0,0 @@
package algorithms.minimax;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
import com.baeldung.algorithms.minimax.MiniMax;
import com.baeldung.algorithms.minimax.Tree;
public class MinimaxTest {
private Tree gameTree;
private MiniMax miniMax;
@Before
public void initMiniMaxUtility() {
miniMax = new MiniMax();
}
@Test
public void givenMiniMax_whenConstructTree_thenNotNullTree() {
assertNull(gameTree);
miniMax.constructTree(6);
gameTree = miniMax.getTree();
assertNotNull(gameTree);
}
@Test
public void givenMiniMax_whenCheckWin_thenComputeOptimal() {
miniMax.constructTree(6);
boolean result = miniMax.checkWin();
assertTrue(result);
miniMax.constructTree(8);
result = miniMax.checkWin();
assertFalse(result);
}
}

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@ -1,4 +1,4 @@
package algorithms;
package com.baeldung.algorithms;
import org.junit.Assert;
import org.junit.Test;

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@ -1,4 +1,4 @@
package algorithms;
package com.baeldung.algorithms;
import org.junit.Assert;
import org.junit.Test;

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@ -0,0 +1,58 @@
package com.baeldung.algorithms;
import com.baeldung.algorithms.hillclimbing.HillClimbing;
import com.baeldung.algorithms.hillclimbing.State;
import org.junit.Before;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.Stack;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
public class HillClimbingAlgorithmUnitTest {
private Stack<String> initStack;
private Stack<String> goalStack;
@Before
public void initStacks() {
String blockArr[] = { "B", "C", "D", "A" };
String goalBlockArr[] = { "A", "B", "C", "D" };
initStack = new Stack<>();
for (String block : blockArr)
initStack.push(block);
goalStack = new Stack<>();
for (String block : goalBlockArr)
goalStack.push(block);
}
@Test
public void givenInitAndGoalState_whenGetPathWithHillClimbing_thenPathFound() {
HillClimbing hillClimbing = new HillClimbing();
List<State> path;
try {
path = hillClimbing.getRouteWithHillClimbing(initStack, goalStack);
assertNotNull(path);
assertEquals(path.get(path.size() - 1)
.getState()
.get(0), goalStack);
} catch (Exception e) {
e.printStackTrace();
}
}
@Test
public void givenCurrentState_whenFindNextState_thenBetterHeuristics() {
HillClimbing hillClimbing = new HillClimbing();
List<Stack<String>> initList = new ArrayList<>();
initList.add(initStack);
State currentState = new State(initList);
currentState.setHeuristics(hillClimbing.getHeuristicsValue(initList, goalStack));
State nextState = hillClimbing.findNextState(currentState, goalStack);
assertTrue(nextState.getHeuristics() > currentState.getHeuristics());
}
}

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package com.baeldung.algorithms;
import com.baeldung.algorithms.middleelementlookup.MiddleElementLookup;
import com.baeldung.algorithms.middleelementlookup.Node;
import org.junit.Test;
import java.util.LinkedList;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
public class MiddleElementLookupUnitTest {
@Test
public void whenFindingMiddleLinkedList_thenMiddleFound() {
assertEquals("3", MiddleElementLookup
.findMiddleElementLinkedList(createLinkedList(5))
.get());
assertEquals("2", MiddleElementLookup
.findMiddleElementLinkedList(createLinkedList(4))
.get());
}
@Test
public void whenFindingMiddleFromHead_thenMiddleFound() {
assertEquals("3", MiddleElementLookup
.findMiddleElementFromHead(createNodesList(5))
.get());
assertEquals("2", MiddleElementLookup
.findMiddleElementFromHead(createNodesList(4))
.get());
}
@Test
public void whenFindingMiddleFromHead1PassRecursively_thenMiddleFound() {
assertEquals("3", MiddleElementLookup
.findMiddleElementFromHead1PassRecursively(createNodesList(5))
.get());
assertEquals("2", MiddleElementLookup
.findMiddleElementFromHead1PassRecursively(createNodesList(4))
.get());
}
@Test
public void whenFindingMiddleFromHead1PassIteratively_thenMiddleFound() {
assertEquals("3", MiddleElementLookup
.findMiddleElementFromHead1PassIteratively(createNodesList(5))
.get());
assertEquals("2", MiddleElementLookup
.findMiddleElementFromHead1PassIteratively(createNodesList(4))
.get());
}
@Test
public void whenListEmptyOrNull_thenMiddleNotFound() {
// null list
assertFalse(MiddleElementLookup
.findMiddleElementLinkedList(null)
.isPresent());
assertFalse(MiddleElementLookup
.findMiddleElementFromHead(null)
.isPresent());
assertFalse(MiddleElementLookup
.findMiddleElementFromHead1PassIteratively(null)
.isPresent());
assertFalse(MiddleElementLookup
.findMiddleElementFromHead1PassRecursively(null)
.isPresent());
// empty LinkedList
assertFalse(MiddleElementLookup
.findMiddleElementLinkedList(new LinkedList<>())
.isPresent());
// LinkedList with nulls
LinkedList<String> nullsList = new LinkedList<>();
nullsList.add(null);
nullsList.add(null);
assertFalse(MiddleElementLookup
.findMiddleElementLinkedList(nullsList)
.isPresent());
// nodes with null values
assertFalse(MiddleElementLookup
.findMiddleElementFromHead(new Node(null))
.isPresent());
assertFalse(MiddleElementLookup
.findMiddleElementFromHead1PassIteratively(new Node(null))
.isPresent());
assertFalse(MiddleElementLookup
.findMiddleElementFromHead1PassRecursively(new Node(null))
.isPresent());
}
private static LinkedList<String> createLinkedList(int n) {
LinkedList<String> list = new LinkedList<>();
for (int i = 1; i <= n; i++) {
list.add(String.valueOf(i));
}
return list;
}
private static Node createNodesList(int n) {
Node head = new Node("1");
Node current = head;
for (int i = 2; i <= n; i++) {
Node newNode = new Node(String.valueOf(i));
current.setNext(newNode);
current = newNode;
}
return head;
}
}

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@ -1,4 +1,4 @@
package algorithms;
package com.baeldung.algorithms;
import com.baeldung.algorithms.automata.*;
import org.junit.Test;

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@ -1,4 +1,4 @@
package algorithms;
package com.baeldung.algorithms;
import org.junit.Assert;
import org.junit.Test;

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@ -0,0 +1,25 @@
package com.baeldung.algorithms;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.algorithms.string.search.StringSearchAlgorithms;
public class StringSearchAlgorithmsUnitTest {
@Test
public void testStringSearchAlgorithms(){
String text = "This is some nice text.";
String pattern = "some";
int realPosition = text.indexOf(pattern);
Assert.assertTrue(realPosition == StringSearchAlgorithms.simpleTextSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.RabinKarpMethod(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.KnuthMorrisPrattSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.BoyerMooreHorspoolSimpleSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.BoyerMooreHorspoolSearch(pattern.toCharArray(), text.toCharArray()));
}
}

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package com.baeldung.algorithms.analysis;
import org.junit.Test;
public class AnalysisRunnerLiveTest {
int n = 10;
int total = 0;
@Test
public void whenConstantComplexity_thenConstantRuntime() {
System.out.println("**** n = " + n + " ****");
System.out.println();
// Constant Time
System.out.println("**** Constant time ****");
System.out.println("Hey - your input is: " + n);
System.out.println("Running time not dependent on input size!");
System.out.println();
}
@Test
public void whenLogarithmicComplexity_thenLogarithmicRuntime() {
// Logarithmic Time
System.out.println("**** Logarithmic Time ****");
for (int i = 1; i < n; i = i * 2) {
// System.out.println("Hey - I'm busy looking at: " + i);
total++;
}
System.out.println("Total amount of times run: " + total);
System.out.println();
}
@Test
public void whenLinearComplexity_thenLinearRuntime() {
// Linear Time
System.out.println("**** Linear Time ****");
for (int i = 0; i < n; i++) {
// System.out.println("Hey - I'm busy looking at: " + i);
total++;
}
System.out.println("Total amount of times run: " + total);
System.out.println();
}
@Test
public void whenNLogNComplexity_thenNLogNRuntime() {
// N Log N Time
System.out.println("**** nlogn Time ****");
total = 0;
for (
int i = 1; i <= n; i++) {
for (int j = 1; j < n; j = j * 2) {
// System.out.println("Hey - I'm busy looking at: " + i + " and " + j);
total++;
}
}
System.out.println("Total amount of times run: " + total);
System.out.println();
}
@Test
public void whenQuadraticComplexity_thenQuadraticRuntime() {
// Quadratic Time
System.out.println("**** Quadratic Time ****");
total = 0;
for (
int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
// System.out.println("Hey - I'm busy looking at: " + i + " and " + j);
total++;
}
}
System.out.println("Total amount of times run: " + total);
System.out.println();
}
@Test
public void whenCubicComplexity_thenCubicRuntime() {
// Cubic Time
System.out.println("**** Cubic Time ****");
total = 0;
for (
int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
for (int k = 1; k <= n; k++) {
// System.out.println("Hey - I'm busy looking at: " + i + " and " + j + " and " + k);
total++;
}
}
}
System.out.println("Total amount of times run: " + total);
System.out.println();
}
@Test
public void whenExponentialComplexity_thenExponentialRuntime() {
// Exponential Time
System.out.println("**** Exponential Time ****");
total = 0;
for (
int i = 1; i <= Math.pow(2, n); i++) {
// System.out.println("Hey - I'm busy looking at: " + i);
total++;
}
System.out.println("Total amount of times run: " + total);
System.out.println();
}
@Test
public void whenFactorialComplexity_thenFactorialRuntime() {
// Factorial Time
System.out.println("**** Factorial Time ****");
total = 0;
for (
int i = 1; i <=
factorial(n); i++) {
// System.out.println("Hey - I'm busy looking at: " + i);
total++;
}
System.out.println("Total amount of times run: " + total);
}
static int factorial(int n) {
if (n == 0 || n == 1)
return 1;
else
return n * factorial(n - 1);
}
}

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package com.baeldung.algorithms.binarysearch;
import java.util.Arrays;
import java.util.List;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.algorithms.binarysearch.BinarySearch;
public class BinarySearchUnitTest {
int[] sortedArray = { 0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9 };
int key = 6;
int expectedIndexForSearchKey = 7;
int low = 0;
int high = sortedArray.length - 1;
List<Integer> sortedList = Arrays.asList(0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 9);
@Test
public void givenASortedArrayOfIntegers_whenBinarySearchRunIterativelyForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchIteratively(sortedArray, key, low, high));
}
@Test
public void givenASortedArrayOfIntegers_whenBinarySearchRunRecursivelyForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchRecursively(sortedArray, key, low, high));
}
@Test
public void givenASortedArrayOfIntegers_whenBinarySearchRunUsingArraysClassStaticMethodForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchUsingJavaArrays(sortedArray, key));
}
@Test
public void givenASortedListOfIntegers_whenBinarySearchRunUsingCollectionsClassStaticMethodForANumber_thenGetIndexOfTheNumber() {
BinarySearch binSearch = new BinarySearch();
Assert.assertEquals(expectedIndexForSearchKey, binSearch.runBinarySearchUsingJavaCollections(sortedList, key));
}
}

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@ -1,26 +0,0 @@
package com.baeldung.algorithms.bubblesort;
import static org.junit.Assert.*;
import org.junit.Test;
public class BubbleSortTest {
@Test
public void givenIntegerArray_whenSortedWithBubbleSort_thenGetSortedArray() {
Integer[] array = { 2, 1, 4, 6, 3, 5 };
Integer[] sortedArray = { 1, 2, 3, 4, 5, 6 };
BubbleSort bubbleSort = new BubbleSort();
bubbleSort.bubbleSort(array);
assertArrayEquals(array, sortedArray);
}
@Test
public void givenIntegerArray_whenSortedWithOptimizedBubbleSort_thenGetSortedArray() {
Integer[] array = { 2, 1, 4, 6, 3, 5 };
Integer[] sortedArray = { 1, 2, 3, 4, 5, 6 };
BubbleSort bubbleSort = new BubbleSort();
bubbleSort.optimizedBubbleSort(array);
assertArrayEquals(array, sortedArray);
}
}

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@ -0,0 +1,26 @@
package com.baeldung.algorithms.bubblesort;
import static org.junit.Assert.*;
import org.junit.Test;
public class BubbleSortUnitTest {
@Test
public void givenIntegerArray_whenSortedWithBubbleSort_thenGetSortedArray() {
Integer[] array = { 2, 1, 4, 6, 3, 5 };
Integer[] sortedArray = { 1, 2, 3, 4, 5, 6 };
BubbleSort bubbleSort = new BubbleSort();
bubbleSort.bubbleSort(array);
assertArrayEquals(array, sortedArray);
}
@Test
public void givenIntegerArray_whenSortedWithOptimizedBubbleSort_thenGetSortedArray() {
Integer[] array = { 2, 1, 4, 6, 3, 5 };
Integer[] sortedArray = { 1, 2, 3, 4, 5, 6 };
BubbleSort bubbleSort = new BubbleSort();
bubbleSort.optimizedBubbleSort(array);
assertArrayEquals(array, sortedArray);
}
}

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@ -0,0 +1,54 @@
package com.baeldung.algorithms.distancebetweenpoints;
import org.junit.Test;
import com.baeldung.algorithms.distancebetweenpoints.DistanceBetweenPointsService;
import static org.junit.Assert.assertEquals;
public class DistanceBetweenPointsServiceUnitTest {
private DistanceBetweenPointsService service = new DistanceBetweenPointsService();
@Test
public void givenTwoPoints_whenCalculateDistanceByFormula_thenCorrect() {
double x1 = 3;
double y1 = 4;
double x2 = 7;
double y2 = 1;
double distance = service.calculateDistanceBetweenPoints(x1, y1, x2, y2);
assertEquals(distance, 5, 0.001);
}
@Test
public void givenTwoPoints_whenCalculateDistanceWithHypot_thenCorrect() {
double x1 = 3;
double y1 = 4;
double x2 = 7;
double y2 = 1;
double distance = service.calculateDistanceBetweenPointsWithHypot(x1, y1, x2, y2);
assertEquals(distance, 5, 0.001);
}
@Test
public void givenTwoPoints_whenCalculateDistanceWithPoint2D_thenCorrect() {
double x1 = 3;
double y1 = 4;
double x2 = 7;
double y2 = 1;
double distance = service.calculateDistanceBetweenPointsWithPoint2D(x1, y1, x2, y2);
assertEquals(distance, 5, 0.001);
}
}

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@ -1,32 +0,0 @@
package com.baeldung.algorithms.editdistance;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import static org.junit.Assert.assertEquals;
@RunWith(Parameterized.class)
public class EditDistanceTest extends EditDistanceDataProvider {
private String x;
private String y;
private int result;
public EditDistanceTest(String a, String b, int res) {
super();
x = a;
y = b;
result = res;
}
@Test
public void testEditDistance_RecursiveImplementation() {
assertEquals(result, EditDistanceRecursive.calculate(x, y));
}
@Test
public void testEditDistance_givenDynamicProgrammingImplementation() {
assertEquals(result, EditDistanceDynamicProgramming.calculate(x, y));
}
}

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package com.baeldung.algorithms.editdistance;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import static org.junit.Assert.assertEquals;
@RunWith(Parameterized.class)
public class EditDistanceUnitTest extends EditDistanceDataProvider {
private String x;
private String y;
private int result;
public EditDistanceUnitTest(String a, String b, int res) {
super();
x = a;
y = b;
result = res;
}
@Test
public void testEditDistance_RecursiveImplementation() {
assertEquals(result, EditDistanceRecursive.calculate(x, y));
}
@Test
public void testEditDistance_givenDynamicProgrammingImplementation() {
assertEquals(result, EditDistanceDynamicProgramming.calculate(x, y));
}
}

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package com.baeldung.algorithms.linesintersection;
import java.awt.Point;
import java.util.Optional;
import org.junit.Test;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;
public class LinesIntersectionServiceUnitTest {
private LinesIntersectionService service = new LinesIntersectionService();
@Test
public void givenNotParallelLines_whenCalculatePoint_thenPresent() {
double m1 = 0;
double b1 = 0;
double m2 = 1;
double b2 = -1;
Optional<Point> point = service.calculateIntersectionPoint(m1, b1, m2, b2);
assertTrue(point.isPresent());
assertEquals(point.get().getX(), 1, 0.001);
assertEquals(point.get().getY(), 0, 0.001);
}
@Test
public void givenParallelLines_whenCalculatePoint_thenEmpty() {
double m1 = 1;
double b1 = 0;
double m2 = 1;
double b2 = -1;
Optional<Point> point = service.calculateIntersectionPoint(m1, b1, m2, b2);
assertFalse(point.isPresent());
}
}

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@ -1,23 +0,0 @@
package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleDetectionBruteForceTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleDetectionBruteForceTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_detectLoop() {
Assert.assertEquals(cycleExists, CycleDetectionBruteForce.detectCycle(head).cycleExists);
}
}

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package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleDetectionBruteForceUnitTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleDetectionBruteForceUnitTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_detectLoop() {
Assert.assertEquals(cycleExists, CycleDetectionBruteForce.detectCycle(head).cycleExists);
}
}

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@ -1,23 +0,0 @@
package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleDetectionByFastAndSlowIteratorsTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleDetectionByFastAndSlowIteratorsTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_detectLoop() {
Assert.assertEquals(cycleExists, CycleDetectionByFastAndSlowIterators.detectCycle(head).cycleExists);
}
}

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package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleDetectionByFastAndSlowIteratorsUnitTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleDetectionByFastAndSlowIteratorsUnitTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_detectLoop() {
Assert.assertEquals(cycleExists, CycleDetectionByFastAndSlowIterators.detectCycle(head).cycleExists);
}
}

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@ -1,23 +0,0 @@
package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleDetectionByHashingTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleDetectionByHashingTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_detectLoop() {
Assert.assertEquals(cycleExists, CycleDetectionByHashing.detectCycle(head).cycleExists);
}
}

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package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleDetectionByHashingUnitTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleDetectionByHashingUnitTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_detectLoop() {
Assert.assertEquals(cycleExists, CycleDetectionByHashing.detectCycle(head).cycleExists);
}
}

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package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleRemovalBruteForceTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleRemovalBruteForceTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_ifLoopExists_thenDetectAndRemoveLoop() {
Assert.assertEquals(cycleExists, CycleRemovalBruteForce.detectAndRemoveCycle(head));
Assert.assertFalse(CycleDetectionByFastAndSlowIterators.detectCycle(head).cycleExists);
}
}

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package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleRemovalBruteForceUnitTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleRemovalBruteForceUnitTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_ifLoopExists_thenDetectAndRemoveLoop() {
Assert.assertEquals(cycleExists, CycleRemovalBruteForce.detectAndRemoveCycle(head));
Assert.assertFalse(CycleDetectionByFastAndSlowIterators.detectCycle(head).cycleExists);
}
}

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@ -1,24 +0,0 @@
package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleRemovalByCountingLoopNodesTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleRemovalByCountingLoopNodesTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_ifLoopExists_thenDetectAndRemoveLoop() {
Assert.assertEquals(cycleExists, CycleRemovalByCountingLoopNodes.detectAndRemoveCycle(head));
Assert.assertFalse(CycleDetectionByFastAndSlowIterators.detectCycle(head).cycleExists);
}
}

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package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleRemovalByCountingLoopNodesUnitTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleRemovalByCountingLoopNodesUnitTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_ifLoopExists_thenDetectAndRemoveLoop() {
Assert.assertEquals(cycleExists, CycleRemovalByCountingLoopNodes.detectAndRemoveCycle(head));
Assert.assertFalse(CycleDetectionByFastAndSlowIterators.detectCycle(head).cycleExists);
}
}

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package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleRemovalWithoutCountingLoopNodesTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleRemovalWithoutCountingLoopNodesTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_ifLoopExists_thenDetectAndRemoveLoop() {
Assert.assertEquals(cycleExists, CycleRemovalWithoutCountingLoopNodes.detectAndRemoveCycle(head));
Assert.assertFalse(CycleDetectionByFastAndSlowIterators.detectCycle(head).cycleExists);
}
}

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package com.baeldung.algorithms.linkedlist;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
@RunWith(value = Parameterized.class)
public class CycleRemovalWithoutCountingLoopNodesUnitTest extends CycleDetectionTestBase {
boolean cycleExists;
Node<Integer> head;
public CycleRemovalWithoutCountingLoopNodesUnitTest(Node<Integer> head, boolean cycleExists) {
super();
this.cycleExists = cycleExists;
this.head = head;
}
@Test
public void givenList_ifLoopExists_thenDetectAndRemoveLoop() {
Assert.assertEquals(cycleExists, CycleRemovalWithoutCountingLoopNodes.detectAndRemoveCycle(head));
Assert.assertFalse(CycleDetectionByFastAndSlowIterators.detectCycle(head).cycleExists);
}
}

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package com.baeldung.algorithms.mcts;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import com.baeldung.algorithms.mcts.montecarlo.MonteCarloTreeSearch;
import com.baeldung.algorithms.mcts.montecarlo.State;
import com.baeldung.algorithms.mcts.montecarlo.UCT;
import com.baeldung.algorithms.mcts.tictactoe.Board;
import com.baeldung.algorithms.mcts.tictactoe.Position;
import com.baeldung.algorithms.mcts.tree.Tree;
public class MCTSUnitTest {
private Tree gameTree;
private MonteCarloTreeSearch mcts;
@Before
public void initGameTree() {
gameTree = new Tree();
mcts = new MonteCarloTreeSearch();
}
@Test
public void givenStats_whenGetUCTForNode_thenUCTMatchesWithManualData() {
double uctValue = 15.79;
assertEquals(UCT.uctValue(600, 300, 20), uctValue, 0.01);
}
@Test
public void giveninitBoardState_whenGetAllPossibleStates_thenNonEmptyList() {
State initState = gameTree.getRoot().getState();
List<State> possibleStates = initState.getAllPossibleStates();
assertTrue(possibleStates.size() > 0);
}
@Test
public void givenEmptyBoard_whenPerformMove_thenLessAvailablePossitions() {
Board board = new Board();
int initAvailablePositions = board.getEmptyPositions().size();
board.performMove(Board.P1, new Position(1, 1));
int availablePositions = board.getEmptyPositions().size();
assertTrue(initAvailablePositions > availablePositions);
}
@Test
public void givenEmptyBoard_whenSimulateInterAIPlay_thenGameDraw() {
Board board = new Board();
int player = Board.P1;
int totalMoves = Board.DEFAULT_BOARD_SIZE * Board.DEFAULT_BOARD_SIZE;
for (int i = 0; i < totalMoves; i++) {
board = mcts.findNextMove(board, player);
if (board.checkStatus() != -1) {
break;
}
player = 3 - player;
}
int winStatus = board.checkStatus();
assertEquals(winStatus, Board.DRAW);
}
@Test
public void givenEmptyBoard_whenLevel1VsLevel3_thenLevel3WinsOrDraw() {
Board board = new Board();
MonteCarloTreeSearch mcts1 = new MonteCarloTreeSearch();
mcts1.setLevel(1);
MonteCarloTreeSearch mcts3 = new MonteCarloTreeSearch();
mcts3.setLevel(3);
int player = Board.P1;
int totalMoves = Board.DEFAULT_BOARD_SIZE * Board.DEFAULT_BOARD_SIZE;
for (int i = 0; i < totalMoves; i++) {
if (player == Board.P1)
board = mcts3.findNextMove(board, player);
else
board = mcts1.findNextMove(board, player);
if (board.checkStatus() != -1) {
break;
}
player = 3 - player;
}
int winStatus = board.checkStatus();
assertTrue(winStatus == Board.DRAW || winStatus == Board.P1);
}
}

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package com.baeldung.algorithms.minimax;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.*;
import com.baeldung.algorithms.minimax.MiniMax;
import com.baeldung.algorithms.minimax.Tree;
public class MinimaxUnitTest {
private Tree gameTree;
private MiniMax miniMax;
@Before
public void initMiniMaxUtility() {
miniMax = new MiniMax();
}
@Test
public void givenMiniMax_whenConstructTree_thenNotNullTree() {
assertNull(gameTree);
miniMax.constructTree(6);
gameTree = miniMax.getTree();
assertNotNull(gameTree);
}
@Test
public void givenMiniMax_whenCheckWin_thenComputeOptimal() {
miniMax.constructTree(6);
boolean result = miniMax.checkWin();
assertTrue(result);
miniMax.constructTree(8);
result = miniMax.checkWin();
assertFalse(result);
}
}

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@ -1,84 +0,0 @@
package com.baeldung.algorithms.moneywords;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import com.baeldung.algorithms.numberwordconverter.NumberWordConverter;
public class NumberWordConverterTest {
@Test
public void whenMoneyNegative_thenReturnInvalidInput() {
assertEquals(NumberWordConverter.INVALID_INPUT_GIVEN, NumberWordConverter.getMoneyIntoWords(-13));
}
@Test
public void whenZeroDollarsGiven_thenReturnEmptyString() {
assertEquals("", NumberWordConverter.getMoneyIntoWords(0));
}
@Test
public void whenOnlyDollarsGiven_thenReturnWords() {
assertEquals("one dollar", NumberWordConverter.getMoneyIntoWords(1));
}
@Test
public void whenOnlyCentsGiven_thenReturnWords() {
assertEquals("sixty cents", NumberWordConverter.getMoneyIntoWords(0.6));
}
@Test
public void whenAlmostAMillioDollarsGiven_thenReturnWords() {
String expectedResult = "nine hundred ninety nine thousand nine hundred ninety nine dollars";
assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(999_999));
}
@Test
public void whenThirtyMillionDollarsGiven_thenReturnWords() {
String expectedResult = "thirty three million three hundred forty eight thousand nine hundred seventy eight dollars";
assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(33_348_978));
}
@Test
public void whenTwoBillionDollarsGiven_thenReturnWords() {
String expectedResult = "two billion one hundred thirty three million two hundred forty seven thousand eight hundred ten dollars";
assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(2_133_247_810));
}
@Test
public void whenGivenDollarsAndCents_thenReturnWords() {
String expectedResult = "nine hundred twenty four dollars and sixty cents";
assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(924.6));
}
@Test
public void whenOneDollarAndNoCents_thenReturnDollarSingular() {
assertEquals("one dollar", NumberWordConverter.getMoneyIntoWords(1));
}
@Test
public void whenNoDollarsAndOneCent_thenReturnCentSingular() {
assertEquals("one cent", NumberWordConverter.getMoneyIntoWords(0.01));
}
@Test
public void whenNoDollarsAndTwoCents_thenReturnCentsPlural() {
assertEquals("two cents", NumberWordConverter.getMoneyIntoWords(0.02));
}
@Test
public void whenNoDollarsAndNinetyNineCents_thenReturnWords() {
assertEquals("ninety nine cents", NumberWordConverter.getMoneyIntoWords(0.99));
}
@Test
public void whenNoDollarsAndNineFiveNineCents_thenCorrectRounding() {
assertEquals("ninety six cents", NumberWordConverter.getMoneyIntoWords(0.959));
}
@Test
public void whenGivenDollarsAndCents_thenReturnWordsVersionTwo() {
assertEquals("three hundred ten £ 00/100", NumberWordConverter.getMoneyIntoWords("310"));
}
}

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package com.baeldung.algorithms.moneywords;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
import com.baeldung.algorithms.numberwordconverter.NumberWordConverter;
public class NumberWordConverterUnitTest {
@Test
public void whenMoneyNegative_thenReturnInvalidInput() {
assertEquals(NumberWordConverter.INVALID_INPUT_GIVEN, NumberWordConverter.getMoneyIntoWords(-13));
}
@Test
public void whenZeroDollarsGiven_thenReturnEmptyString() {
assertEquals("", NumberWordConverter.getMoneyIntoWords(0));
}
@Test
public void whenOnlyDollarsGiven_thenReturnWords() {
assertEquals("one dollar", NumberWordConverter.getMoneyIntoWords(1));
}
@Test
public void whenOnlyCentsGiven_thenReturnWords() {
assertEquals("sixty cents", NumberWordConverter.getMoneyIntoWords(0.6));
}
@Test
public void whenAlmostAMillioDollarsGiven_thenReturnWords() {
String expectedResult = "nine hundred ninety nine thousand nine hundred ninety nine dollars";
assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(999_999));
}
@Test
public void whenThirtyMillionDollarsGiven_thenReturnWords() {
String expectedResult = "thirty three million three hundred forty eight thousand nine hundred seventy eight dollars";
assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(33_348_978));
}
@Test
public void whenTwoBillionDollarsGiven_thenReturnWords() {
String expectedResult = "two billion one hundred thirty three million two hundred forty seven thousand eight hundred ten dollars";
assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(2_133_247_810));
}
@Test
public void whenGivenDollarsAndCents_thenReturnWords() {
String expectedResult = "nine hundred twenty four dollars and sixty cents";
assertEquals(expectedResult, NumberWordConverter.getMoneyIntoWords(924.6));
}
@Test
public void whenOneDollarAndNoCents_thenReturnDollarSingular() {
assertEquals("one dollar", NumberWordConverter.getMoneyIntoWords(1));
}
@Test
public void whenNoDollarsAndOneCent_thenReturnCentSingular() {
assertEquals("one cent", NumberWordConverter.getMoneyIntoWords(0.01));
}
@Test
public void whenNoDollarsAndTwoCents_thenReturnCentsPlural() {
assertEquals("two cents", NumberWordConverter.getMoneyIntoWords(0.02));
}
@Test
public void whenNoDollarsAndNinetyNineCents_thenReturnWords() {
assertEquals("ninety nine cents", NumberWordConverter.getMoneyIntoWords(0.99));
}
@Test
public void whenNoDollarsAndNineFiveNineCents_thenCorrectRounding() {
assertEquals("ninety six cents", NumberWordConverter.getMoneyIntoWords(0.959));
}
@Test
public void whenGivenDollarsAndCents_thenReturnWordsVersionTwo() {
assertEquals("three hundred ten £ 00/100", NumberWordConverter.getMoneyIntoWords("310"));
}
}

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@ -1,28 +0,0 @@
package com.baeldung.algorithms.prime;
import static com.baeldung.algorithms.prime.PrimeGenerator.*;
import java.util.Arrays;
import java.util.List;
import org.junit.Test;
import static org.junit.Assert.*;
public class PrimeGeneratorTest {
@Test
public void whenBruteForced_returnsSuccessfully() {
final List<Integer> primeNumbers = primeNumbersBruteForce(20);
assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
}
@Test
public void whenOptimized_returnsSuccessfully() {
final List<Integer> primeNumbers = primeNumbersTill(20);
assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
}
@Test
public void whenSieveOfEratosthenes_returnsSuccessfully() {
final List<Integer> primeNumbers = sieveOfEratosthenes(20);
assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
}
}

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

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package com.baeldung.algorithms.romannumerals;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class RomanArabicConverterUnitTest {
@Test
public void given2018Roman_WhenConvertingToArabic_ThenReturn2018() {
String roman2018 = "MMXVIII";
int result = RomanArabicConverter.romanToArabic(roman2018);
assertThat(result).isEqualTo(2018);
}
@Test
public void given1999Arabic_WhenConvertingToRoman_ThenReturnMCMXCIX() {
int arabic1999 = 1999;
String result = RomanArabicConverter.arabicToRoman(arabic1999);
assertThat(result).isEqualTo("MCMXCIX");
}
}

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package com.baeldung.algorithms.string;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
public class EnglishAlphabetLettersUnitTest {
@Test
void givenString_whenContainsAllCharacter_thenTrue() {
String input = "Farmer jack realized that big yellow quilts were expensive";
Assertions.assertTrue(EnglishAlphabetLetters.checkStringForAllTheLetters(input));
}
@Test
void givenString_whenContainsAllCharacter_thenUsingStreamExpectTrue() {
String input = "Farmer jack realized that big yellow quilts were expensive";
Assertions.assertTrue(EnglishAlphabetLetters.checkStringForAllLetterUsingStream(input));
}
}

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@ -1,38 +0,0 @@
package com.baeldung.jgrapht;
import static org.junit.Assert.assertEquals;
import java.util.List;
import org.jgrapht.VertexFactory;
import org.jgrapht.alg.HamiltonianCycle;
import org.jgrapht.generate.CompleteGraphGenerator;
import org.jgrapht.graph.DefaultEdge;
import org.jgrapht.graph.SimpleWeightedGraph;
import org.junit.Before;
import org.junit.Test;
public class CompleteGraphTest {
static SimpleWeightedGraph<String, DefaultEdge> completeGraph;
static int size = 10;
@Before
public void createCompleteGraph() {
completeGraph = new SimpleWeightedGraph<>(DefaultEdge.class);
CompleteGraphGenerator<String, DefaultEdge> completeGenerator = new CompleteGraphGenerator<String, DefaultEdge>(size);
VertexFactory<String> vFactory = new VertexFactory<String>() {
private int id = 0;
public String createVertex() {
return "v" + id++;
}
};
completeGenerator.generateGraph(completeGraph, vFactory, null);
}
@Test
public void givenCompleteGraph_whenGetHamiltonianCyclePath_thenGetVerticeListInSequence() {
List<String> verticeList = HamiltonianCycle.getApproximateOptimalForCompleteGraph(completeGraph);
assertEquals(verticeList.size(), completeGraph.vertexSet().size());
}
}

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package com.baeldung.jgrapht;
import static org.junit.Assert.assertEquals;
import java.util.List;
import org.jgrapht.VertexFactory;
import org.jgrapht.alg.HamiltonianCycle;
import org.jgrapht.generate.CompleteGraphGenerator;
import org.jgrapht.graph.DefaultEdge;
import org.jgrapht.graph.SimpleWeightedGraph;
import org.junit.Before;
import org.junit.Test;
public class CompleteGraphUnitTest {
static SimpleWeightedGraph<String, DefaultEdge> completeGraph;
static int size = 10;
@Before
public void createCompleteGraph() {
completeGraph = new SimpleWeightedGraph<>(DefaultEdge.class);
CompleteGraphGenerator<String, DefaultEdge> completeGenerator = new CompleteGraphGenerator<String, DefaultEdge>(size);
VertexFactory<String> vFactory = new VertexFactory<String>() {
private int id = 0;
public String createVertex() {
return "v" + id++;
}
};
completeGenerator.generateGraph(completeGraph, vFactory, null);
}
@Test
public void givenCompleteGraph_whenGetHamiltonianCyclePath_thenGetVerticeListInSequence() {
List<String> verticeList = HamiltonianCycle.getApproximateOptimalForCompleteGraph(completeGraph);
assertEquals(verticeList.size(), completeGraph.vertexSet().size());
}
}

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@ -1,95 +0,0 @@
package com.baeldung.jgrapht;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.stream.IntStream;
import org.jgrapht.DirectedGraph;
import org.jgrapht.GraphPath;
import org.jgrapht.alg.CycleDetector;
import org.jgrapht.alg.KosarajuStrongConnectivityInspector;
import org.jgrapht.alg.interfaces.StrongConnectivityAlgorithm;
import org.jgrapht.alg.shortestpath.AllDirectedPaths;
import org.jgrapht.alg.shortestpath.BellmanFordShortestPath;
import org.jgrapht.alg.shortestpath.DijkstraShortestPath;
import org.jgrapht.graph.DefaultDirectedGraph;
import org.jgrapht.graph.DefaultEdge;
import org.jgrapht.graph.DirectedSubgraph;
import org.jgrapht.traverse.BreadthFirstIterator;
import org.jgrapht.traverse.DepthFirstIterator;
import org.junit.Before;
import org.junit.Test;
public class DirectedGraphTests {
DirectedGraph<String, DefaultEdge> directedGraph;
@Before
public void createDirectedGraph() {
directedGraph = new DefaultDirectedGraph<String, DefaultEdge>(DefaultEdge.class);
IntStream.range(1, 10).forEach(i -> {
directedGraph.addVertex("v" + i);
});
directedGraph.addEdge("v1", "v2");
directedGraph.addEdge("v2", "v4");
directedGraph.addEdge("v4", "v3");
directedGraph.addEdge("v3", "v1");
directedGraph.addEdge("v5", "v4");
directedGraph.addEdge("v5", "v6");
directedGraph.addEdge("v6", "v7");
directedGraph.addEdge("v7", "v5");
directedGraph.addEdge("v8", "v5");
directedGraph.addEdge("v9", "v8");
}
@Test
public void givenDirectedGraph_whenGetStronglyConnectedSubgraphs_thenPathExistsBetweenStronglyconnectedVertices() {
StrongConnectivityAlgorithm<String, DefaultEdge> scAlg = new KosarajuStrongConnectivityInspector<>(directedGraph);
List<DirectedSubgraph<String, DefaultEdge>> stronglyConnectedSubgraphs = scAlg.stronglyConnectedSubgraphs();
List<String> stronglyConnectedVertices = new ArrayList<>(stronglyConnectedSubgraphs.get(3).vertexSet());
String randomVertex1 = stronglyConnectedVertices.get(0);
String randomVertex2 = stronglyConnectedVertices.get(3);
AllDirectedPaths<String, DefaultEdge> allDirectedPaths = new AllDirectedPaths<>(directedGraph);
List<GraphPath<String, DefaultEdge>> possiblePathList = allDirectedPaths.getAllPaths(randomVertex1, randomVertex2, false, stronglyConnectedVertices.size());
assertTrue(possiblePathList.size() > 0);
}
@Test
public void givenDirectedGraphWithCycle_whenCheckCycles_thenDetectCycles() {
CycleDetector<String, DefaultEdge> cycleDetector = new CycleDetector<String, DefaultEdge>(directedGraph);
assertTrue(cycleDetector.detectCycles());
Set<String> cycleVertices = cycleDetector.findCycles();
assertTrue(cycleVertices.size() > 0);
}
@Test
public void givenDirectedGraph_whenCreateInstanceDepthFirstIterator_thenGetIterator() {
DepthFirstIterator depthFirstIterator = new DepthFirstIterator<>(directedGraph);
assertNotNull(depthFirstIterator);
}
@Test
public void givenDirectedGraph_whenCreateInstanceBreadthFirstIterator_thenGetIterator() {
BreadthFirstIterator breadthFirstIterator = new BreadthFirstIterator<>(directedGraph);
assertNotNull(breadthFirstIterator);
}
@Test
public void givenDirectedGraph_whenGetDijkstraShortestPath_thenGetNotNullPath() {
DijkstraShortestPath dijkstraShortestPath = new DijkstraShortestPath(directedGraph);
List<String> shortestPath = dijkstraShortestPath.getPath("v1", "v4").getVertexList();
assertNotNull(shortestPath);
}
@Test
public void givenDirectedGraph_whenGetBellmanFordShortestPath_thenGetNotNullPath() {
BellmanFordShortestPath bellmanFordShortestPath = new BellmanFordShortestPath(directedGraph);
List<String> shortestPath = bellmanFordShortestPath.getPath("v1", "v4").getVertexList();
assertNotNull(shortestPath);
}
}

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@ -0,0 +1,95 @@
package com.baeldung.jgrapht;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.stream.IntStream;
import org.jgrapht.DirectedGraph;
import org.jgrapht.GraphPath;
import org.jgrapht.alg.CycleDetector;
import org.jgrapht.alg.KosarajuStrongConnectivityInspector;
import org.jgrapht.alg.interfaces.StrongConnectivityAlgorithm;
import org.jgrapht.alg.shortestpath.AllDirectedPaths;
import org.jgrapht.alg.shortestpath.BellmanFordShortestPath;
import org.jgrapht.alg.shortestpath.DijkstraShortestPath;
import org.jgrapht.graph.DefaultDirectedGraph;
import org.jgrapht.graph.DefaultEdge;
import org.jgrapht.graph.DirectedSubgraph;
import org.jgrapht.traverse.BreadthFirstIterator;
import org.jgrapht.traverse.DepthFirstIterator;
import org.junit.Before;
import org.junit.Test;
public class DirectedGraphUnitTest {
DirectedGraph<String, DefaultEdge> directedGraph;
@Before
public void createDirectedGraph() {
directedGraph = new DefaultDirectedGraph<String, DefaultEdge>(DefaultEdge.class);
IntStream.range(1, 10).forEach(i -> {
directedGraph.addVertex("v" + i);
});
directedGraph.addEdge("v1", "v2");
directedGraph.addEdge("v2", "v4");
directedGraph.addEdge("v4", "v3");
directedGraph.addEdge("v3", "v1");
directedGraph.addEdge("v5", "v4");
directedGraph.addEdge("v5", "v6");
directedGraph.addEdge("v6", "v7");
directedGraph.addEdge("v7", "v5");
directedGraph.addEdge("v8", "v5");
directedGraph.addEdge("v9", "v8");
}
@Test
public void givenDirectedGraph_whenGetStronglyConnectedSubgraphs_thenPathExistsBetweenStronglyconnectedVertices() {
StrongConnectivityAlgorithm<String, DefaultEdge> scAlg = new KosarajuStrongConnectivityInspector<>(directedGraph);
List<DirectedSubgraph<String, DefaultEdge>> stronglyConnectedSubgraphs = scAlg.stronglyConnectedSubgraphs();
List<String> stronglyConnectedVertices = new ArrayList<>(stronglyConnectedSubgraphs.get(3).vertexSet());
String randomVertex1 = stronglyConnectedVertices.get(0);
String randomVertex2 = stronglyConnectedVertices.get(3);
AllDirectedPaths<String, DefaultEdge> allDirectedPaths = new AllDirectedPaths<>(directedGraph);
List<GraphPath<String, DefaultEdge>> possiblePathList = allDirectedPaths.getAllPaths(randomVertex1, randomVertex2, false, stronglyConnectedVertices.size());
assertTrue(possiblePathList.size() > 0);
}
@Test
public void givenDirectedGraphWithCycle_whenCheckCycles_thenDetectCycles() {
CycleDetector<String, DefaultEdge> cycleDetector = new CycleDetector<String, DefaultEdge>(directedGraph);
assertTrue(cycleDetector.detectCycles());
Set<String> cycleVertices = cycleDetector.findCycles();
assertTrue(cycleVertices.size() > 0);
}
@Test
public void givenDirectedGraph_whenCreateInstanceDepthFirstIterator_thenGetIterator() {
DepthFirstIterator depthFirstIterator = new DepthFirstIterator<>(directedGraph);
assertNotNull(depthFirstIterator);
}
@Test
public void givenDirectedGraph_whenCreateInstanceBreadthFirstIterator_thenGetIterator() {
BreadthFirstIterator breadthFirstIterator = new BreadthFirstIterator<>(directedGraph);
assertNotNull(breadthFirstIterator);
}
@Test
public void givenDirectedGraph_whenGetDijkstraShortestPath_thenGetNotNullPath() {
DijkstraShortestPath dijkstraShortestPath = new DijkstraShortestPath(directedGraph);
List<String> shortestPath = dijkstraShortestPath.getPath("v1", "v4").getVertexList();
assertNotNull(shortestPath);
}
@Test
public void givenDirectedGraph_whenGetBellmanFordShortestPath_thenGetNotNullPath() {
BellmanFordShortestPath bellmanFordShortestPath = new BellmanFordShortestPath(directedGraph);
List<String> shortestPath = bellmanFordShortestPath.getPath("v1", "v4").getVertexList();
assertNotNull(shortestPath);
}
}

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@ -1,42 +0,0 @@
package com.baeldung.jgrapht;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.util.stream.IntStream;
import org.jgrapht.GraphPath;
import org.jgrapht.alg.cycle.HierholzerEulerianCycle;
import org.jgrapht.graph.DefaultEdge;
import org.jgrapht.graph.SimpleWeightedGraph;
import org.junit.Before;
import org.junit.Test;
public class EulerianCircuitTest {
SimpleWeightedGraph<String, DefaultEdge> simpleGraph;
@Before
public void createGraphWithEulerianCircuit() {
simpleGraph = new SimpleWeightedGraph<>(DefaultEdge.class);
IntStream.range(1, 6).forEach(i -> {
simpleGraph.addVertex("v" + i);
});
IntStream.range(1, 6).forEach(i -> {
int endVertexNo = (i + 1) > 5 ? 1 : i + 1;
simpleGraph.addEdge("v" + i, "v" + endVertexNo);
});
}
@Test
public void givenGraph_whenCheckEluerianCycle_thenGetResult() {
HierholzerEulerianCycle eulerianCycle = new HierholzerEulerianCycle<>();
assertTrue(eulerianCycle.isEulerian(simpleGraph));
}
@Test
public void givenGraphWithEulerianCircuit_whenGetEulerianCycle_thenGetGraphPath() {
HierholzerEulerianCycle eulerianCycle = new HierholzerEulerianCycle<>();
GraphPath path = eulerianCycle.getEulerianCycle(simpleGraph);
assertTrue(path.getEdgeList().containsAll(simpleGraph.edgeSet()));
}
}

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@ -0,0 +1,42 @@
package com.baeldung.jgrapht;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.util.stream.IntStream;
import org.jgrapht.GraphPath;
import org.jgrapht.alg.cycle.HierholzerEulerianCycle;
import org.jgrapht.graph.DefaultEdge;
import org.jgrapht.graph.SimpleWeightedGraph;
import org.junit.Before;
import org.junit.Test;
public class EulerianCircuitUnitTest {
SimpleWeightedGraph<String, DefaultEdge> simpleGraph;
@Before
public void createGraphWithEulerianCircuit() {
simpleGraph = new SimpleWeightedGraph<>(DefaultEdge.class);
IntStream.range(1, 6).forEach(i -> {
simpleGraph.addVertex("v" + i);
});
IntStream.range(1, 6).forEach(i -> {
int endVertexNo = (i + 1) > 5 ? 1 : i + 1;
simpleGraph.addEdge("v" + i, "v" + endVertexNo);
});
}
@Test
public void givenGraph_whenCheckEluerianCycle_thenGetResult() {
HierholzerEulerianCycle eulerianCycle = new HierholzerEulerianCycle<>();
assertTrue(eulerianCycle.isEulerian(simpleGraph));
}
@Test
public void givenGraphWithEulerianCircuit_whenGetEulerianCycle_thenGetGraphPath() {
HierholzerEulerianCycle eulerianCycle = new HierholzerEulerianCycle<>();
GraphPath path = eulerianCycle.getEulerianCycle(simpleGraph);
assertTrue(path.getEdgeList().containsAll(simpleGraph.edgeSet()));
}
}

View File

@ -1,11 +1,11 @@
<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">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>animal-sniffer-mvn-plugin</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>example-animal-sniffer-mvn-plugin</name>
<name>animal-sniffer-mvn-plugin</name>
<url>http://maven.apache.org</url>
<parent>
@ -14,15 +14,6 @@
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>

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@ -0,0 +1,13 @@
<?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>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

View File

@ -1,7 +1,6 @@
<?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>

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@ -0,0 +1,13 @@
<?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>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

View File

@ -1,6 +1,6 @@
<?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">
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>

View File

@ -0,0 +1,13 @@
<?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>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

View File

@ -1,6 +1,6 @@
<?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">
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>
<packaging>pom</packaging>

3
antlr/README.md Normal file
View File

@ -0,0 +1,3 @@
### Relevant Articles:
- [Java with ANTLR](http://www.baeldung.com/java-antlr)

58
antlr/pom.xml Normal file
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@ -0,0 +1,58 @@
<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>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<build>
<plugins>
<plugin>
<groupId>org.antlr</groupId>
<artifactId>antlr4-maven-plugin</artifactId>
<version>${antlr.version}</version>
<executions>
<execution>
<goals>
<goal>antlr4</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>${mojo.version}</version>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>${basedir}/target/generated-sources/antlr4</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.antlr</groupId>
<artifactId>antlr4-runtime</artifactId>
<version>${antlr.version}</version>
</dependency>
</dependencies>
<properties>
<antlr.version>4.7.1</antlr.version>
<mojo.version>3.0.0</mojo.version>
</properties>
</project>

File diff suppressed because it is too large Load Diff

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@ -0,0 +1,16 @@
grammar Log;
log : entry+;
entry : timestamp ' ' level ' ' message CRLF;
timestamp : DATE ' ' TIME;
level : 'ERROR' | 'INFO' | 'DEBUG';
message : (TEXT | ' ')+;
fragment DIGIT : [0-9];
fragment TWODIGIT : DIGIT DIGIT;
fragment LETTER : [A-Za-z];
DATE : TWODIGIT TWODIGIT '-' LETTER LETTER LETTER '-' TWODIGIT;
TIME : TWODIGIT ':' TWODIGIT ':' TWODIGIT;
TEXT : LETTER+;
CRLF : '\r'? '\n' | '\r';

View File

@ -0,0 +1,28 @@
package com.baeldung.antlr.java;
import com.baeldung.antlr.Java8BaseListener;
import com.baeldung.antlr.Java8Parser;
import org.antlr.v4.runtime.tree.TerminalNode;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class UppercaseMethodListener extends Java8BaseListener {
private List<String> errors = new ArrayList<String>();
@Override
public void enterMethodDeclarator(Java8Parser.MethodDeclaratorContext ctx) {
TerminalNode node = ctx.Identifier();
String methodName = node.getText();
if (Character.isUpperCase(methodName.charAt(0))){
errors.add(String.format("Method %s is uppercased!", methodName));
}
}
public List<String> getErrors(){
return Collections.unmodifiableList(errors);
}
}

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@ -0,0 +1,51 @@
package com.baeldung.antlr.log;
import com.baeldung.antlr.LogBaseListener;
import com.baeldung.antlr.LogParser;
import com.baeldung.antlr.log.model.LogLevel;
import com.baeldung.antlr.log.model.LogEntry;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
public class LogListener extends LogBaseListener {
private static final DateTimeFormatter DEFAULT_DATETIME_FORMATTER
= DateTimeFormatter.ofPattern("yyyy-MMM-dd HH:mm:ss", Locale.ENGLISH);
private List<LogEntry> entries = new ArrayList<>();
private LogEntry currentLogEntry;
@Override
public void enterEntry(LogParser.EntryContext ctx) {
this.currentLogEntry = new LogEntry();
}
@Override
public void exitEntry(LogParser.EntryContext ctx) {
entries.add(currentLogEntry);
}
@Override
public void enterTimestamp(LogParser.TimestampContext ctx) {
currentLogEntry.setTimestamp(LocalDateTime.parse(ctx.getText(), DEFAULT_DATETIME_FORMATTER));
}
@Override
public void enterMessage(LogParser.MessageContext ctx) {
currentLogEntry.setMessage(ctx.getText());
}
@Override
public void enterLevel(LogParser.LevelContext ctx) {
currentLogEntry.setLevel(LogLevel.valueOf(ctx.getText()));
}
public List<LogEntry> getEntries() {
return Collections.unmodifiableList(entries);
}
}

View File

@ -0,0 +1,35 @@
package com.baeldung.antlr.log.model;
import java.time.LocalDateTime;
public class LogEntry {
private LogLevel level;
private String message;
private LocalDateTime timestamp;
public LogLevel getLevel() {
return level;
}
public void setLevel(LogLevel level) {
this.level = level;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public LocalDateTime getTimestamp() {
return timestamp;
}
public void setTimestamp(LocalDateTime timestamp) {
this.timestamp = timestamp;
}
}

View File

@ -0,0 +1,5 @@
package com.baeldung.antlr.log.model;
public enum LogLevel {
DEBUG, INFO, ERROR
}

View File

@ -0,0 +1,13 @@
<?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>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

View File

@ -0,0 +1,30 @@
package com.baeldung.antlr;
import com.baeldung.antlr.java.UppercaseMethodListener;
import org.antlr.v4.runtime.CharStreams;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.tree.ParseTree;
import org.antlr.v4.runtime.tree.ParseTreeWalker;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;
public class JavaParserUnitTest {
@Test
public void whenOneMethodStartsWithUpperCase_thenOneErrorReturned() throws Exception{
String javaClassContent = "public class SampleClass { void DoSomething(){} }";
Java8Lexer java8Lexer = new Java8Lexer(CharStreams.fromString(javaClassContent));
CommonTokenStream tokens = new CommonTokenStream(java8Lexer);
Java8Parser java8Parser = new Java8Parser(tokens);
ParseTree tree = java8Parser.compilationUnit();
ParseTreeWalker walker = new ParseTreeWalker();
UppercaseMethodListener uppercaseMethodListener = new UppercaseMethodListener();
walker.walk(uppercaseMethodListener, tree);
assertThat(uppercaseMethodListener.getErrors().size(), is(1));
assertThat(uppercaseMethodListener.getErrors().get(0),
is("Method DoSomething is uppercased!"));
}
}

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@ -0,0 +1,36 @@
package com.baeldung.antlr;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;
import com.baeldung.antlr.log.LogListener;
import com.baeldung.antlr.log.model.LogLevel;
import com.baeldung.antlr.log.model.LogEntry;
import org.antlr.v4.runtime.CharStreams;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.tree.ParseTreeWalker;
import org.junit.Test;
import java.time.LocalDateTime;
public class LogParserUnitTest {
@Test
public void whenLogContainsOneErrorLogEntry_thenOneErrorIsReturned() throws Exception {
String logLines = "2018-May-05 14:20:21 DEBUG entering awesome method\r\n" +
"2018-May-05 14:20:24 ERROR Bad thing happened\r\n";
LogLexer serverLogLexer = new LogLexer(CharStreams.fromString(logLines));
CommonTokenStream tokens = new CommonTokenStream( serverLogLexer );
LogParser logParser = new LogParser(tokens);
ParseTreeWalker walker = new ParseTreeWalker();
LogListener logWalker = new LogListener();
walker.walk(logWalker, logParser.log());
assertThat(logWalker.getEntries().size(), is(2));
LogEntry error = logWalker.getEntries().get(1);
assertThat(error.getLevel(), is(LogLevel.ERROR));
assertThat(error.getMessage(), is("Bad thing happened"));
assertThat(error.getTimestamp(), is(LocalDateTime.of(2018,5,5,14,20,24)));
}
}

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apache-avro/README.md Normal file
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@ -0,0 +1,2 @@
### Relevant Articles:
- [Guide to Apache Avro](http://www.baeldung.com/java-apache-avro)

89
apache-avro/pom.xml Normal file
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@ -0,0 +1,89 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>apache-avro</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Apache Avro</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<compiler-plugin.version>3.5</compiler-plugin.version>
<avro.version>1.8.2</avro.version>
<java.version>1.8</java.version>
<slf4j.version>1.7.25</slf4j.version>
</properties>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>${slf4j.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro</artifactId>
<version>${avro.version}</version>
</dependency>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro-compiler</artifactId>
<version>${avro.version}</version>
</dependency>
<dependency>
<groupId>org.apache.avro</groupId>
<artifactId>avro-maven-plugin</artifactId>
<version>${avro.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${compiler-plugin.version}</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.avro</groupId>
<artifactId>avro-maven-plugin</artifactId>
<version>${avro.version}</version>
<executions>
<execution>
<id>schemas</id>
<phase>generate-sources</phase>
<goals>
<goal>schema</goal>
<goal>protocol</goal>
<goal>idl-protocol</goal>
</goals>
<configuration>
<sourceDirectory>${project.basedir}/src/main/resources/</sourceDirectory>
<outputDirectory>${project.basedir}/src/main/java/</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

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package com.baeldung.avro.util;
import org.apache.avro.Schema;
import org.apache.avro.compiler.specific.SpecificCompiler;
import java.io.File;
import java.io.IOException;
public class AvroClassGenerator {
public void generateAvroClasses() throws IOException {
SpecificCompiler compiler = new SpecificCompiler(new Schema.Parser().parse(new File("src/main/resources/avroHttpRequest-schema.avsc")));
compiler.compileToDestination(new File("src/main/resources"), new File("src/main/java"));
}
}

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package com.baeldung.avro.util;
import org.apache.avro.Schema;
import org.apache.avro.SchemaBuilder;
public class AvroSchemaBuilder {
public Schema createAvroHttpRequestSchema(){
Schema clientIdentifier = SchemaBuilder.record("ClientIdentifier").namespace("com.baeldung.avro.model")
.fields().requiredString("hostName").requiredString("ipAddress").endRecord();
Schema avroHttpRequest = SchemaBuilder.record("AvroHttpRequest").namespace("com.baeldung.avro.model").fields()
.requiredLong("requestTime")
.name("clientIdentifier").type(clientIdentifier).noDefault()
.name("employeeNames").type().array().items().stringType().arrayDefault(null)
.name("active").type().enumeration("Active").symbols("YES", "NO").noDefault()
.endRecord();
return avroHttpRequest;
}
}

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/**
* Autogenerated by Avro
*
* DO NOT EDIT DIRECTLY
*/
package com.baeldung.avro.util.model;
@SuppressWarnings("all")
@org.apache.avro.specific.AvroGenerated
public enum Active {
YES, NO ;
public static final org.apache.avro.Schema SCHEMA$ = new org.apache.avro.Schema.Parser().parse("{\"type\":\"enum\",\"name\":\"Active\",\"namespace\":\"com.baeldung.avro.model\",\"symbols\":[\"YES\",\"NO\"]}");
public static org.apache.avro.Schema getClassSchema() { return SCHEMA$; }
}

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