gistfile1.txt

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

    Thread[] threads = new Thread[100];
    for (int i = 0; i < 100; i++) {
      threads[i] = new Thread(new MyRunnable(i));
    }

    for (int i = 0; i < 100; i++) {
      threads[i].start();
    }


  }
}

class MyRunnable implements Runnable {
  private int index;

  MyRunnable(int index) {
    this.index = index;
  }

  @Override
  public void run() {
    System.out.println("running" + index);
  }
}

JavaThreadTester

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

    Thread z1 = new Thread(new ZombieThread("WINDOWS"));
    Thread z2 = new Thread(new ZombieThread("LINUX"));
    Thread z3 = new Thread(new ZombieThread("UNIX"));
    Thread z4 = new Thread(new ZombieThread("UNIX"));

    System.out.println("Active Count"+Thread.activeCount());

    z1.run();
    z2.run();
    z3.run();
    z4.run();

    System.out.println("Active Count"+Thread.activeCount());
  }
}