java 多线程学习（一）

 public class ThreadA extends Thread {
     private static int threadID = ;

     public ThreadA() {
         super("ThreadID:" + (++threadID));
     }

     public void run() {
         try {
             System.out.println(getName() + " 线程运行开始!");
             for (int i = ; i < ; i++) {
                 System.out.println(this.getName() + " is " + i);

                 Thread.sleep();//这里要sleep，不然看不出多线程的效果
             }
         } catch (Exception e) {
             e.printStackTrace();
         }
     }

 }

public class MyTest {

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

输入结果：

ThreadID:1 线程运行开始!
ThreadID:1 is 0
ThreadID:2 线程运行开始!
ThreadID:2 is 0
ThreadID:1 is 1
ThreadID:2 is 1
ThreadID:1 is 2
ThreadID:2 is 2
ThreadID:1 is 3
ThreadID:2 is 3
ThreadID:1 is 4
ThreadID:2 is 4
ThreadID:1 is 5
ThreadID:2 is 5
ThreadID:1 is 6
ThreadID:2 is 6
ThreadID:1 is 7
ThreadID:2 is 7
ThreadID:1 is 8
ThreadID:2 is 8
ThreadID:1 is 9
ThreadID:2 is 9