Merge branch 'eugenp:master' into master

core-java-modules/core-java-12/README.md

@@ -2,3 +2,4 @@
 
 - [String API Updates in Java 12](https://www.baeldung.com/java12-string-api)
 - [New Features in Java 12](https://www.baeldung.com/java-12-new-features)
+- [Compare the Content of Two Files in Java](https://www.baeldung.com/java-compare-files)

core-java-modules/core-java-16/src/main/java/com/baeldung/java_16_features/mapmulti/Album.java

@@ -0,0 +1,49 @@
+package com.baeldung.java_16_features.mapmulti;
+
+import java.util.List;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+
+import org.apache.commons.lang3.tuple.ImmutablePair;
+import org.apache.commons.lang3.tuple.Pair;
+
+public class Album {
+
+    private String albumName;
+    private int albumCost;
+    private List<Artist> artists;
+
+    Album(String name, int albumCost, List<Artist> artists) {
+        this.albumName = name;
+        this.artists = artists;
+        this.albumCost = albumCost;
+    }
+
+    public void artistAlbumPairsToMajorLabels(Consumer<Pair<String, String>> consumer) {
+
+        for (Artist artist : artists) {
+            if (artist.isAssociatedMajorLabels()) {
+                String concatLabels = artist.getMajorLabels()
+                    .stream()
+                    .collect(Collectors.joining(","));
+                consumer.accept(new ImmutablePair<>(artist.getName() + ":" + albumName, concatLabels));
+            }
+        }
+    }
+
+    public String getAlbumName() {
+        return albumName;
+    }
+
+    public int getAlbumCost() {
+        return albumCost;
+    }
+
+    List<Artist> getArtists() {
+        return artists;
+    }
+
+    public String toString() {
+        return albumName;
+    }
+}

core-java-modules/core-java-16/src/main/java/com/baeldung/java_16_features/mapmulti/Artist.java

@@ -0,0 +1,50 @@
+package com.baeldung.java_16_features.mapmulti;
+
+import java.util.List;
+import java.util.Objects;
+
+public class Artist {
+
+    private final String name;
+    private boolean associatedMajorLabels;
+    private List<String> majorLabels;
+
+    Artist(String name, boolean associatedMajorLabels, List<String> majorLabels) {
+        this.name = name;
+        this.associatedMajorLabels = associatedMajorLabels;
+        this.majorLabels = majorLabels;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public boolean isAssociatedMajorLabels() {
+        return associatedMajorLabels;
+    }
+
+    public List<String> getMajorLabels() {
+        return majorLabels;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        Artist other = (Artist) obj;
+        return Objects.equals(name, other.name);
+    }
+
+    public String toString() {
+        return name;
+    }
+}

core-java-modules/core-java-16/src/test/java/com/baeldung/java_16_features/mapmulti/JavaStreamMapMultiUnitTest.java

@@ -0,0 +1,134 @@
+package com.baeldung.java_16_features.mapmulti;
+
+import static java.util.stream.Collectors.toList;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.offset;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.commons.lang3.tuple.ImmutablePair;
+import org.apache.commons.lang3.tuple.Pair;
+import org.junit.jupiter.api.Test;
+
+public class JavaStreamMapMultiUnitTest {
+
+    private static final List<Album> albums = Arrays.asList(new Album("album1", 10, Arrays.asList(new Artist("bob", true, Arrays.asList("label1", "label3")), new Artist("tom", true, Arrays.asList("label2", "label3")))),
+        new Album("album2", 20, Arrays.asList(new Artist("bill", true, Arrays.asList("label2", "label3")), new Artist("tom", true, Arrays.asList("label2", "label4")))));
+
+    @Test
+    public void givenAListOfintegers_whenMapMulti_thenGetListOfOfEvenDoublesPlusPercentage() {
+
+        List<Integer> integers = Arrays.asList(1, 2, 3, 4, 5);
+        double percentage = .01;
+        List<Double> evenDoubles = integers.stream()
+            .<Double> mapMulti((integer, consumer) -> {
+                if (integer % 2 == 0) {
+                    consumer.accept((double) integer * (1 + percentage));
+                }
+            })
+            .collect(toList());
+
+        assertThat(evenDoubles).containsAll(Arrays.asList(2.02D, 4.04D));
+    }
+
+    @Test
+    public void givenAListOfintegers_whenFilterMap_thenGetListOfOfEvenDoublesPlusPercentage() {
+
+        List<Integer> integers = Arrays.asList(1, 2, 3, 4, 5);
+        double percentage = .01;
+        List<Double> evenDoubles = integers.stream()
+            .filter(integer -> integer % 2 == 0)
+            .<Double> map(integer -> ((double) integer * (1 + percentage)))
+            .collect(toList());
+
+        assertThat(evenDoubles).containsAll(Arrays.asList(2.02D, 4.04D));
+    }
+
+    @Test
+    public void givenAListOfintegers_whenMapMultiToDouble_thenGetSumOfEvenNumbersAfterApplyPercentage() {
+
+        List<Integer> integers = Arrays.asList(1, 2, 3, 4, 5, 6, 7);
+        double percentage = .01;
+        double sum = integers.stream()
+            .mapMultiToDouble((integer, consumer) -> {
+                if (integer % 2 == 0) {
+                    consumer.accept(integer * (1 + percentage));
+                }
+            })
+            .sum();
+
+        assertThat(sum).isEqualTo(12.12, offset(0.001d));
+    }
+
+    @Test
+    public void givenAListOfAlbums_whenFlatMap_thenGetListOfArtistAlbumPairs() {
+
+        List<Pair<String, String>> artistAlbum = albums.stream()
+            .flatMap(album -> album.getArtists()
+                .stream()
+                .map(artist -> new ImmutablePair<String, String>(artist.getName(), album.getAlbumName())))
+            .collect(toList());
+
+        assertThat(artistAlbum).contains(new ImmutablePair<String, String>("bob", "album1"), new ImmutablePair<String, 
+            String>("tom", "album1"), new ImmutablePair<String, String>("bill", "album2"), new ImmutablePair<String, String>("tom", "album2"));
+    }
+
+    @Test
+    public void givenAListOfAlbums_whenMapMulti_thenGetListOfPairsOfArtistAlbum() {
+
+        List<Pair<String, String>> artistAlbum = albums.stream()
+            .<Pair<String, String>> mapMulti((album, consumer) -> {
+                for (Artist artist : album.getArtists()) {
+                    consumer.accept(new ImmutablePair<String, String>(artist.getName(), album.getAlbumName()));
+                }
+            })
+            .collect(toList());
+
+        assertThat(artistAlbum).contains(new ImmutablePair<String, String>("bob", "album1"), new ImmutablePair<String, String>("tom", "album1"), 
+            new ImmutablePair<String, String>("bill", "album2"), new ImmutablePair<String, String>("tom", "album2"));
+    }
+
+    @Test
+    public void givenAListOfAlbums_whenFlatMap_thenGetListOfArtistAlbumjPairsBelowGivenCost() {
+
+        int upperCost = 9;
+        List<Pair<String, String>> artistAlbum = albums.stream()
+            .flatMap(album -> album.getArtists()
+                .stream()
+                .filter(artist -> upperCost > album.getAlbumCost())
+                .map(artist -> new ImmutablePair<String, String>(artist.getName(), album.getAlbumName())))
+            .collect(toList());
+
+        assertTrue(artistAlbum.isEmpty());
+    }
+
+    @Test
+    public void givenAListOfAlbums_whenMapMulti_thenGetListOfArtistAlbumPairsBelowGivenCost() {
+
+        int upperCost = 9;
+        List<Pair<String, String>> artistAlbum = albums.stream()
+            .<Pair<String, String>> mapMulti((album, consumer) -> {
+                if (album.getAlbumCost() < upperCost) {
+                    for (Artist artist : album.getArtists()) {
+                        consumer.accept(new ImmutablePair<String, String>(artist.getName(), album.getAlbumName()));
+                    }
+                }
+            })
+            .collect(toList());
+
+        assertTrue(artistAlbum.isEmpty());
+    }
+
+    @Test
+    public void givenAListOfAlbums_whenMapMulti_thenGetPairsOfArtistMajorLabelsUsingMethodReference() {
+
+        List<Pair<String, String>> artistLabels = albums.stream()
+            .mapMulti(Album::artistAlbumPairsToMajorLabels)
+            .collect(toList());
+
+        assertThat(artistLabels).contains(new ImmutablePair<String, String>("bob:album1", "label1,label3"), new ImmutablePair<String, String>("tom:album1", "label2,label3"), 
+            new ImmutablePair<String, String>("bill:album2", "label2,label3"), new ImmutablePair<String, String>("tom:album2", "label2,label4"));
+    }
+}

core-java-modules/core-java-datetime-string/README.md

@@ -11,3 +11,4 @@ This module contains articles about parsing and formatting Java date and time ob
 - [Display All Time Zones With GMT And UTC in Java](http://www.baeldung.com/java-time-zones)
 - [Convert between String and Timestamp](https://www.baeldung.com/java-string-to-timestamp)
 - [Convert String to Date in Java](http://www.baeldung.com/java-string-to-date)
+- [Format a Milliseconds Duration to HH:MM:SS](https://www.baeldung.com/java-ms-to-hhmmss)

core-java-modules/core-java-datetime-string/pom.xml

@@ -75,7 +75,7 @@
 
     <properties>
         <commons-validator.version>1.6</commons-validator.version>
-        <joda-time.version>2.10</joda-time.version>
+        <joda-time.version>2.10.10</joda-time.version>
         <!-- testing -->
         <assertj.version>3.6.1</assertj.version>
         <maven.compiler.source>1.9</maven.compiler.source>

core-java-modules/core-java-datetime-string/src/test/java/com/baeldung/formatduration/FormatDurationUnitTest.java

@@ -0,0 +1,54 @@
+package com.baeldung.formatduration;
+
+import org.apache.commons.lang3.time.DurationFormatUtils;
+import org.joda.time.Period;
+import org.junit.Test;
+
+import java.time.Duration;
+import java.util.concurrent.TimeUnit;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class FormatDurationUnitTest {
+
+
+    @Test
+    public void givenInterval_WhenFormatInterval_formatDuration() {
+        long HH = TimeUnit.MILLISECONDS.toHours(38114000);
+        long MM = TimeUnit.MILLISECONDS.toMinutes(38114000) % 60;
+        long SS = TimeUnit.MILLISECONDS.toSeconds(38114000) % 60;
+        String timeInHHMMSS = String.format("%02d:%02d:%02d", HH, MM, SS);
+
+        assertThat(timeInHHMMSS).isEqualTo("10:35:14");
+    }
+
+    @Test
+    public void givenInterval_WhenFormatUsingDuration_formatDuration() {
+        Duration duration = Duration.ofMillis(38114000);
+        long seconds = duration.getSeconds();
+        long HH = seconds / 3600;
+        long MM = (seconds % 3600) / 60;
+        long SS = seconds % 60;
+        String timeInHHMMSS =  String.format("%02d:%02d:%02d", HH, MM, SS);
+        assertThat(timeInHHMMSS).isEqualTo("10:35:14");
+    }
+
+
+    @Test
+    public void givenInterval_WhenFormatDurationUsingApacheCommons_formatDuration() {
+        assertThat(DurationFormatUtils.formatDuration(38114000, "HH:mm:ss"))
+          .isEqualTo("10:35:14");
+    }
+
+    @Test
+    public void givenInterval_WhenFormatDurationUsingJodaTime_formatDuration() {
+        org.joda.time.Duration duration = new org.joda.time.Duration(38114000);
+        Period period = duration.toPeriod();
+        long HH = period.getHours();
+        long MM = period.getMinutes();
+        long SS = period.getSeconds();
+
+        String timeInHHMMSS = String.format("%02d:%02d:%02d", HH, MM, SS);
+        assertThat(timeInHHMMSS).isEqualTo("10:35:14");
+    }
+}

core-java-modules/core-java-networking-3/README.md

@@ -8,4 +8,5 @@ This module contains articles about networking in Java
 - [Downloading Email Attachments in Java](https://www.baeldung.com/java-download-email-attachments)
 - [Connection Timeout vs. Read Timeout for Java Sockets](https://www.baeldung.com/java-socket-connection-read-timeout)
 - [Find Whether an IP Address Is in the Specified Range or Not in Java](https://www.baeldung.com/java-check-ip-address-range)
+- [Find the IP Address of a Client Connected to a Server](https://www.baeldung.com/java-client-get-ip-address)
 - [[<-- Prev]](/core-java-modules/core-java-networking-2)

core-java-modules/core-java-networking-3/src/main/java/com/baeldung/clientaddress/ApplicationClient.java

@@ -0,0 +1,39 @@
+package com.baeldung.clientaddress;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.net.Socket;
+
+public class ApplicationClient {
+
+    private Socket clientSocket;
+    private PrintWriter out;
+    private BufferedReader in;
+
+    public void connect(String ip, int port) throws IOException {
+        clientSocket = new Socket(ip, port);
+        out = new PrintWriter(clientSocket.getOutputStream(), true);
+        in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
+    }
+
+    public void sendGreetings(String msg) throws IOException {
+        out.println(msg);
+        String reply = in.readLine();
+        System.out.println("Reply received from the server :: " + reply);
+    }
+
+    public void disconnect() throws IOException {
+        in.close();
+        out.close();
+        clientSocket.close();
+    }
+
+    public static void main(String[] args) throws IOException {
+        ApplicationClient client = new ApplicationClient();
+        client.connect(args[0], Integer.parseInt(args[1])); // IP address and port number of the server
+        client.sendGreetings(args[2]); // greetings message
+        client.disconnect();
+    }
+}

core-java-modules/core-java-networking-3/src/main/java/com/baeldung/clientaddress/ApplicationServer.java

@@ -0,0 +1,51 @@
+package com.baeldung.clientaddress;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.net.Socket;
+
+public class ApplicationServer {
+
+    private ServerSocket serverSocket;
+    private Socket connectedSocket;
+    private PrintWriter out;
+    private BufferedReader in;
+
+    public void startServer(int port) throws IOException {
+        serverSocket = new ServerSocket(port);
+        connectedSocket = serverSocket.accept();
+
+        InetSocketAddress socketAddress = (InetSocketAddress) connectedSocket.getRemoteSocketAddress();
+        String clientIpAddress = socketAddress.getAddress()
+            .getHostAddress();
+        System.out.println("IP address of the connected client :: " + clientIpAddress);
+
+        out = new PrintWriter(connectedSocket.getOutputStream(), true);
+        in = new BufferedReader(new InputStreamReader(connectedSocket.getInputStream()));
+        String msg = in.readLine();
+        System.out.println("Message received from the client :: " + msg);
+        out.println("Hello Client !!");
+
+        closeIO();
+        stopServer();
+    }
+
+    private void closeIO() throws IOException {
+        in.close();
+        out.close();
+    }
+
+    private void stopServer() throws IOException {
+        connectedSocket.close();
+        serverSocket.close();
+    }
+
+    public static void main(String[] args) throws IOException {
+        ApplicationServer server = new ApplicationServer();
+        server.startServer(5000);
+    }
+}

core-java-modules/core-java-os/src/main/java/com/baeldung/java9/process/ProcessAPIEnhancements.java

@@ -0,0 +1,101 @@
+package com.baeldung.java9.process;
+
+import java.io.IOException;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.stream.Stream;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ProcessAPIEnhancements {
+
+    static Logger log = LoggerFactory.getLogger(ProcessAPIEnhancements.class);
+
+    public static void main(String[] args) throws IOException, InterruptedException, ExecutionException {
+        infoOfCurrentProcess();
+        infoOfLiveProcesses();
+        infoOfSpawnProcess();
+        infoOfExitCallback();
+        infoOfChildProcess();
+    }
+
+    private static void infoOfCurrentProcess() {
+        ProcessHandle processHandle = ProcessHandle.current();
+        ProcessHandle.Info processInfo = processHandle.info();
+
+        log.info("PID: " + processHandle.pid());
+        log.info("Arguments: " + processInfo.arguments());
+        log.info("Command: " + processInfo.command());
+        log.info("Instant: " + processInfo.startInstant());
+        log.info("Total CPU duration: " + processInfo.totalCpuDuration());
+        log.info("User: " + processInfo.user());
+    }
+
+    private static void infoOfSpawnProcess() throws IOException {
+
+        String javaCmd = ProcessUtils.getJavaCmd().getAbsolutePath();
+        ProcessBuilder processBuilder = new ProcessBuilder(javaCmd, "-version");
+        Process process = processBuilder.inheritIO().start();
+        ProcessHandle processHandle = process.toHandle();
+        ProcessHandle.Info processInfo = processHandle.info();
+
+        log.info("PID: " + processHandle.pid());
+        log.info("Arguments: " + processInfo.arguments());
+        log.info("Command: " + processInfo.command());
+        log.info("Instant: " + processInfo.startInstant());
+        log.info("Total CPU duration: " + processInfo.totalCpuDuration());
+        log.info("User: " + processInfo.user());
+    }
+
+    private static void infoOfLiveProcesses() {
+        Stream<ProcessHandle> liveProcesses = ProcessHandle.allProcesses();
+        liveProcesses.filter(ProcessHandle::isAlive)
+            .forEach(ph -> {
+                log.info("PID: " + ph.pid());
+                log.info("Instance: " + ph.info().startInstant());
+                log.info("User: " + ph.info().user());
+            });
+    }
+
+    private static void infoOfChildProcess() throws IOException {
+        int childProcessCount = 5;
+        for (int i = 0; i < childProcessCount; i++) {
+            String javaCmd = ProcessUtils.getJavaCmd()
+              .getAbsolutePath();
+            ProcessBuilder processBuilder
+              = new ProcessBuilder(javaCmd, "-version");
+            processBuilder.inheritIO().start();
+        }
+
+        Stream<ProcessHandle> children = ProcessHandle.current()
+          .children();
+        children.filter(ProcessHandle::isAlive)
+          .forEach(ph -> log.info("PID: {}, Cmd: {}", ph.pid(), ph.info()
+            .command()));
+        Stream<ProcessHandle> descendants = ProcessHandle.current()
+          .descendants();
+        descendants.filter(ProcessHandle::isAlive)
+          .forEach(ph -> log.info("PID: {}, Cmd: {}", ph.pid(), ph.info()
+            .command()));
+    }
+
+    private static void infoOfExitCallback() throws IOException, InterruptedException, ExecutionException {
+        String javaCmd = ProcessUtils.getJavaCmd()
+          .getAbsolutePath();
+        ProcessBuilder processBuilder
+          = new ProcessBuilder(javaCmd, "-version");
+        Process process = processBuilder.inheritIO()
+          .start();
+        ProcessHandle processHandle = process.toHandle();
+
+        log.info("PID: {} has started", processHandle.pid());
+        CompletableFuture<ProcessHandle> onProcessExit = processHandle.onExit();
+        onProcessExit.get();
+        log.info("Alive: " + processHandle.isAlive());
+        onProcessExit.thenAccept(ph -> {
+            log.info("PID: {} has stopped", ph.pid());
+        });
+    }
+
+}

core-java-modules/core-java-os/src/test/java/com/baeldung/java9/process/ProcessAPIEnhancementsUnitTest.java

@@ -1,132 +0,0 @@
-package com.baeldung.java9.process;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
-
-import java.io.IOException;
-import java.util.concurrent.CompletableFuture;
-import java.util.stream.Stream;
-
-import org.junit.Test;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * Created by sanaulla on 2/23/2017.
- */
-
-public class ProcessAPIEnhancementsUnitTest {
-
-    Logger log = LoggerFactory.getLogger(ProcessAPIEnhancementsUnitTest.class);
-
-    // @Test
-    // OS / Java version dependent
-    public void givenCurrentProcess_whenInvokeGetInfo_thenSuccess() throws IOException {
-        ProcessHandle processHandle = ProcessHandle.current();
-        ProcessHandle.Info processInfo = processHandle.info();
-        assertNotNull(processHandle.pid());
-        assertEquals(true, processInfo.arguments()
-          .isPresent());
-        assertEquals(true, processInfo.command()
-          .isPresent());
-        assertTrue(processInfo.command()
-          .get()
-          .contains("java"));
-
-        assertEquals(true, processInfo.startInstant()
-          .isPresent());
-        assertEquals(true, processInfo.totalCpuDuration()
-          .isPresent());
-        assertEquals(true, processInfo.user()
-          .isPresent());
-    }
-
-    // @Test
-    // OS / Java version dependent
-    public void givenSpawnProcess_whenInvokeGetInfo_thenSuccess() throws IOException {
-
-        String javaCmd = ProcessUtils.getJavaCmd()
-          .getAbsolutePath();
-        ProcessBuilder processBuilder = new ProcessBuilder(javaCmd, "-version");
-        Process process = processBuilder.inheritIO()
-          .start();
-        ProcessHandle processHandle = process.toHandle();
-        ProcessHandle.Info processInfo = processHandle.info();
-        assertNotNull(processHandle.pid());
-        assertEquals(true, processInfo.arguments()
-          .isPresent());
-        assertEquals(true, processInfo.command()
-          .isPresent());
-        assertTrue(processInfo.command()
-          .get()
-          .contains("java"));
-        assertEquals(true, processInfo.startInstant()
-          .isPresent());
-        assertEquals(false, processInfo.totalCpuDuration()
-          .isPresent());
-        assertEquals(true, processInfo.user()
-          .isPresent());
-    }
-
-    // @Test
-    // OS / Java version dependent
-    public void givenLiveProcesses_whenInvokeGetInfo_thenSuccess() {
-        Stream<ProcessHandle> liveProcesses = ProcessHandle.allProcesses();
-        liveProcesses.filter(ProcessHandle::isAlive)
-            .forEach(ph -> {
-                assertNotNull(ph.pid());
-                assertEquals(true, ph.info()
-                  .startInstant()
-                  .isPresent());
-                assertEquals(true, ph.info()
-                  .user()
-                  .isPresent());
-            });
-    }
-
-    // @Test
-    // OS / Java version dependent
-    public void givenProcess_whenGetChildProcess_thenSuccess() throws IOException {
-        int childProcessCount = 5;
-        for (int i = 0; i < childProcessCount; i++) {
-            String javaCmd = ProcessUtils.getJavaCmd()
-              .getAbsolutePath();
-            ProcessBuilder processBuilder
-              = new ProcessBuilder(javaCmd, "-version");
-            processBuilder.inheritIO().start();
-        }
-
-        Stream<ProcessHandle> children = ProcessHandle.current()
-          .children();
-        children.filter(ProcessHandle::isAlive)
-          .forEach(ph -> log.info("PID: {}, Cmd: {}", ph.pid(), ph.info()
-            .command()));
-        Stream<ProcessHandle> descendants = ProcessHandle.current()
-          .descendants();
-        descendants.filter(ProcessHandle::isAlive)
-          .forEach(ph -> log.info("PID: {}, Cmd: {}", ph.pid(), ph.info()
-            .command()));
-    }
-
-    // @Test
-    // OS / Java version dependent
-    public void givenProcess_whenAddExitCallback_thenSuccess() throws Exception {
-        String javaCmd = ProcessUtils.getJavaCmd()
-          .getAbsolutePath();
-        ProcessBuilder processBuilder
-          = new ProcessBuilder(javaCmd, "-version");
-        Process process = processBuilder.inheritIO()
-          .start();
-        ProcessHandle processHandle = process.toHandle();
-
-        log.info("PID: {} has started", processHandle.pid());
-        CompletableFuture<ProcessHandle> onProcessExit = processHandle.onExit();
-        onProcessExit.get();
-        assertEquals(false, processHandle.isAlive());
-        onProcessExit.thenAccept(ph -> {
-            log.info("PID: {} has stopped", ph.pid());
-        });
-    }
-
-}

core-java-modules/core-java-security-3/src/test/java/com/baeldung/cryptography/CryptographyStrengthUnitTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.cryptography;
+
+import org.junit.Test;
+
+import java.security.NoSuchAlgorithmException;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class CryptographyStrengthUnitTest {
+    private static final int UNLIMITED_KEY_SIZE = 2147483647;
+
+    @Test
+    public void whenDefaultCheck_thenUnlimitedReturned() throws NoSuchAlgorithmException {
+        int maxKeySize = javax.crypto.Cipher.getMaxAllowedKeyLength("AES");
+        assertThat(maxKeySize).isEqualTo(UNLIMITED_KEY_SIZE);
+    }
+}