MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class MainClass {
    public static void main(String[] args) {
        PrintTask task1 = new PrintTask("thread1");
        PrintTask task2 = new PrintTask("thread2");
        PrintTask task3 = new PrintTask("thread3");

        System.out.println("Starting threads");

        ExecutorService threadExecutor = Executors.newCachedThreadPool();

        // start threads and place in runnable state
        threadExecutor.execute(task1); // start task1
        threadExecutor.execute(task2); // start task2
        threadExecutor.execute(task3); // start task3

        threadExecutor.shutdown(); // shutdown worker threads

        System.out.println("Threads started, main ends\n");
    }
}

class PrintTask implements Runnable {
    private int sleepTime;

    private String threadName;

    public PrintTask(String name) {
        threadName = name;
        sleepTime = 1000;
    }

    public void run() {
        try {
            System.out.printf("%s going to sleep for %d milliseconds.\n", threadName, sleepTime);

            Thread.sleep(sleepTime); // put thread to sleep
        } catch (InterruptedException exception) {
            exception.printStackTrace();
        }
        System.out.printf("%s done sleeping\n", threadName);
    }
}