initial commit

study-thread-programming/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17">
+		<attributes>
+			<attribute name="module" value="true"/>
+		</attributes>
+	</classpathentry>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

study-thread-programming/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>study-thread-programming</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

study-thread-programming/.settings/org.eclipse.core.resources.prefs

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+eclipse.preferences.version=1
+encoding/<project>=UTF-8

study-thread-programming/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=17
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=17
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=enabled
+org.eclipse.jdt.core.compiler.source=17

study-thread-programming/src/com/example/Exercise01.java

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+package com.example;
+
+import java.util.List;
+import java.util.concurrent.ThreadLocalRandom;
+
+// Thread:  i) Multi-tasking 
+//         ii) Multi-core -> Parallel Programming
+public class Exercise01 {
+
+	public static void main(String[] args) throws InterruptedException {
+		System.out.println("Application is just started.");
+		var task1 = new LotteryTask();
+		var task2 = new LotteryTask();
+		var t1 = new Thread(task1); // Platform (OS) manages -> Kernel-level Thread
+		var t2 = new Thread(task2);
+		t1.start();
+		t2.start();
+		t1.join();
+		System.out.println(task1.getNumbers());
+		t2.join();
+		System.out.println(task2.getNumbers());
+		System.out.println("Application is done.");
+	}
+
+}
+
+class LotteryTask implements Runnable {
+
+	private List<Integer> numbers;
+
+	@Override
+	public void run() {
+		numbers = ThreadLocalRandom.current().ints(1, 60).distinct().limit(6).sorted().boxed().toList();
+	}
+
+	public List<Integer> getNumbers() {
+		return numbers;
+	}
+
+}