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Java Tutorial: Java Threads (How to set the thread as Daemon thread | Daemon thread in java)

Java Tutorial: Java Threads (How to set the thread as Daemon thread | Daemon thread in java)

DisplayThread.java

/*
 * public final void setDaemon(boolean on)
 * 
 * Parameters:
 * ----------- 
 * 
 * on - if true, marks this thread as a
 * daemon thread
 */

public class DisplayThread extends Thread
{

    public void run()
    {
        /*
         * Tests if this thread is a daemon thread.
         */
        if (Thread.currentThread().isDaemon())
        {
            System.out.println("Daemon thread = "
                    + Thread.currentThread().getName());
        }
        else
        {
            System.out.println("user thread = "
                    + Thread.currentThread().getName());
        }
    }

    public static void main(String[] args)
    {
        DisplayThread t1 = new DisplayThread();
        t1.setName("Thread 1");
        DisplayThread t2 = new DisplayThread();
        t2.setName("Thread 2");
        DisplayThread t3 = new DisplayThread();
        t3.setName("Thread 3");

        /*
         * Marks this thread as either a daemon thread or a
         * user thread. The Java Virtual Machine exits when
         * the only threads running are all daemon threads.
         * This method must be invoked before the thread is
         * started.
         * 
         * Now t1 is daemon thread
         */
        t1.setDaemon(true);

        t1.start();
        t2.start();
        t3.start();
    }
}