1 public class ThreadA extends Thread {
 2     private static int threadID = 0;
 3 
 4     public ThreadA() {
 5         super("ThreadID:" + (++threadID));
 6     }
 7 
 8     public void run() {
 9         try {
10             System.out.println(getName() + " 线程运行开始!");
11             for (int i = 0; i < 10; i++) {
12                 System.out.println(this.getName() + " is " + i);
13 
14                 Thread.sleep(1);//这里要sleep，不然看不出多线程的效果
15             }
16         } catch (Exception e) {
17             e.printStackTrace();
18         }
19     }
20 
21 }

public class MyTest {

    public static void main(String[] args){
        ThreadA t1=new ThreadA();
        ThreadA t2=new ThreadA();
        t1.start();
        t2.start();
    }
}