Java示例显示所有正在运行的线程

public class Main extends Thread {

   public static void main(String[] args) {

      Main t1 = new Main();

      t1.setName("thread1");

      t1.start();

      ThreadGroup currentGroup = Thread.currentThread().getThreadGroup();

      int noThreads = currentGroup.activeCount();

      Thread[] lstThreads = new Thread[noThreads];

      currentGroup.enumerate(lstThreads);



      for (int i = 0; i < noThreads; i++) System.out.println("Thread No:" + i + " = " + lstThreads[i].getName());

   }

}