/*
   Try This 12-1

   Extend Thread.
*/
class MyThread extends Thread {

  // Construct a new thread.
  MyThread(String name) {
    super(name); // name thread
    start(); // start the thread
  }

  // Begin execution of new thread.
  public void run() {
    System.out.println(getName() + " starting.");
    try {
      for(int count=0; count < 10; count++) {
        Thread.sleep(400);
        System.out.println("In " + getName() +
                           ", count is " + count);
      }
    }
    catch(InterruptedException exc) {
      System.out.println(getName() + " interrupted.");
    }

    System.out.println(getName() + " terminating.");
  }
}

class ExtendThread {
  public static void main(String[] args) {
    System.out.println("Main thread starting.");

    MyThread mt = new MyThread("Child #1");

    for(int i=0; i < 50; i++) {
      System.out.print(".");
      try {
        Thread.sleep(100);
      }
      catch(InterruptedException exc) {
        System.out.println("Main thread interrupted.");
      }
    }

    System.out.println("Main thread ending.");
  }
}

Results

C:\ece538\java_thread>java ExtendThread
Main thread starting.
.Child #1 starting.
...In Child #1, count is 0
....In Child #1, count is 1
....In Child #1, count is 2
....In Child #1, count is 3
....In Child #1, count is 4
....In Child #1, count is 5
....In Child #1, count is 6
....In Child #1, count is 7
....In Child #1, count is 8
....In Child #1, count is 9
Child #1 terminating.
..........Main thread ending.