java-09

通过继承Thread来创建线程

class ThreadDemo extends Thread {   private Thread t;   private String threadName;      ThreadDemo( String name) {      threadName = name;      System.out.println("Creating " +  threadName );   }      public void run() {      System.out.println("Running " +  threadName );      try {         for(int i = 4; i > 0; i--) {            System.out.println("Thread: " + threadName + ", " + i);            // 让线程睡醒一会            Thread.sleep(50);         }      }catch (InterruptedException e) {         System.out.println("Thread " +  threadName + " interrupted.");      }      System.out.println("Thread " +  threadName + " exiting.");   }      public void start () {      System.out.println("Starting " +  threadName );      if (t == null) {         t = new Thread (this, threadName);         t.start ();      }   }} public class TestThread {    public static void main(String args[]) {      ThreadDemo T1 = new ThreadDemo( "Thread-1");      T1.start();            ThreadDemo T2 = new ThreadDemo( "Thread-2");      T2.start();   }   }