ContohMultiThread

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

public class ContohMultiThread {
    public static void main(String args[]) {

        ExecutorService es = Executors.newFixedThreadPool(4);

        es.execute(new MyThread("A"));
        es.execute(new MyThread("B"));
        es.execute(new MyThread("C"));
        es.execute(new MyThread("D"));

        es.shutdown();
    }
}

class MyThread implements Runnable {
    String name;

    MyThread(String n) {
        name = n;
        new Thread(this);
    }

    public void run() {
        if (name=="A"){
            for (int i=1;i<=10;i++){
                System.out.println(i);
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        if (name=="B"){
            for (int i=10;i<=20;i++){
                System.out.println(i);
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        if (name=="C"){
            for (int i=20;i<=30;i++){
                System.out.println(i);
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        if (name=="D"){
            for (int i=30;i<=40;i++){
                System.out.println(i);
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
    }
}