BAEL-8435 java source code and Gradle setup

gradle-modules/gradle-parallel-testing/build.gradle

@@ -0,0 +1,20 @@
+plugins {
+    id 'java-library'
+}
+
+test {
+    maxParallelForks = (int) (Runtime.runtime.availableProcessors() / 2 + 1)
+    useJUnitPlatform {
+        includeTags testForGradleTag
+    }
+	forkEvery = 0
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+    testImplementation 'org.junit.jupiter:junit-jupiter:5.10.0'
+}

gradle-modules/gradle-parallel-testing/gradle.properties

@@ -0,0 +1 @@
+testForGradleTag=serial

gradle-modules/gradle-parallel-testing/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradle-modules/gradle-parallel-testing/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'gradle-parallel-testing'

gradle-modules/gradle-parallel-testing/src/main/java/com/baeldung/paralleltesting/Application.java

@@ -0,0 +1,9 @@
+package com.baeldung.paralleltesting;
+
+public class Application {
+
+    public static void main(String[] args) {
+        System.out.println("Available processors (cores): " + Runtime.getRuntime()
+            .availableProcessors());
+    }
+}

gradle-modules/gradle-parallel-testing/src/main/java/com/baeldung/paralleltesting/ClassSingleton.java

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+package com.baeldung.paralleltesting;
+
+public final class ClassSingleton {
+
+    public String info = "Initial info class";
+    private static ClassSingleton INSTANCE;
+
+    private static int count = 0;
+
+    private ClassSingleton() {
+    }
+
+    public static ClassSingleton getINSTANCE() {
+        return INSTANCE;
+    }
+
+    public int getCount() {
+        return count;
+    }
+
+    public static ClassSingleton getInstance() {
+        if (INSTANCE == null) {
+            INSTANCE = new ClassSingleton();
+        }
+        count++;
+        return INSTANCE;
+    }
+
+    // more features below ...
+}

gradle-modules/gradle-parallel-testing/src/main/java/com/baeldung/paralleltesting/FolderCreator.java

@@ -0,0 +1,14 @@
+package com.baeldung.paralleltesting;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+
+public class FolderCreator {
+
+    Boolean createFolder(Path path, String name) throws IOException {
+        String newFolder = path.toAbsolutePath() + name;
+        File f = new File(newFolder);
+        return f.mkdir();
+    }
+}