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DisplayThread.java

public class DisplayThread extends Thread
{

    public DisplayThread(String threadName)
    {
        super(threadName);
    }

    public static void main(String[] args)
    {
        DisplayThread displayThread1 = new DisplayThread("DisplayThread-1");
        displayThread1.start();

        DisplayThread displayThread2 = new DisplayThread("DisplayThread-2");
        displayThread2.start();

    }

    public void run()
    {
        /*
         * Returns a reference to the currently executing
         * thread object.
         */
        Thread thread = Thread.currentThread();
        String threadName = thread.getName();
        System.out.println("Run by = " + threadName);
    }
}

Run by = DisplayThread-1
Run by = DisplayThread-2

/*
 * public Thread(Runnable target, String name)
 * 
 * Parameters:
 * -----------
 * 
 * target - the object whose run method is invoked when
 * this thread is started. If null, this thread's run
 * method is invoked.
 * 
 * name - the name of the new thread
 */

public class HelloRunnable implements Runnable
{

    public static void main(String args[])
    {
        HelloRunnable helloRunnable1 = new HelloRunnable();
        Thread thread1 = new Thread(helloRunnable1, "HelloRunnableThread-1");
        thread1.start();        
        
        HelloRunnable helloRunnable2 = new HelloRunnable();
        Thread thread2 = new Thread(helloRunnable2, "HelloRunnableThread-2");
        thread2.start();    
    }

    @Override
    public void run()
    {
        /*
         * Returns a reference to the currently executing
         * thread object.
         */
        Thread thread = Thread.currentThread();
        String threadName = thread.getName();
        System.out.println("Run by = " + threadName);
    }
}