Java - Multi Thread

// Init.java
package thread;

public class Init {

    public static void main(String[] args) {

        new ThreadDemo("thread1").start();
        new ThreadDemo("thread2").start();
    }
}

// ThreadDemo.java
package thread;

import java.util.logging.Level;
import java.util.logging.Logger;

public class ThreadDemo extends Thread {

    String threadName;

    ThreadDemo(String threadName) {
        this.threadName = threadName;
    }

    public void run() {

        try {
            for (int x = 0; x < 5; x++) {
                System.out.println(threadName + " " + x);
                Thread.sleep(5000);  // 5 sec
            }
        } catch (Exception ex) {
        }
    }
}