多线程 线程组

 1 package org.zln.thread;
 2 
 3 import java.util.Date;
 4 
 5 /**
 6  * Created by sherry on 000024/6/24 22:30.
 7  */
 8 public class TestThreadGroup {
 9     public static void main(String[] args) throws InterruptedException {
10         ThreadGroup group1 = new ThreadGroup("group1");
11         /*group2从属于group1  group1是父 group2是子*/
12         ThreadGroup group2 = new ThreadGroup(group1,"group2");
13         /*关联线程与线程组*/
14         Thread t1 = new Thread(group1,new TestThread(1000,"AAA"));
15         Thread t2 = new Thread(group2,new TestThread(1000,"BBB"));
16         Thread t3 = new Thread(group2,new TestThread(1000,"CCC"));
17         t1.start();
18         t2.start();
19         t3.start();
20         System.out.println("线程组1线程数量："+group1.activeCount());
21         System.out.println("线程组2线程数量："+group2.activeCount());
22         System.out.println("线程组1线程组数量："+group1.activeGroupCount());
23 
24         /*10秒后停止所有任务*/
25         for (int i = 0; i < 10; i++) {
26             Thread.sleep(1000);
27             System.out.println(new Date());
28         }
29         group1.stop();//这里只是为了演示 stop是不安全的。实际开发中不要用
30     }
31 }

 1 package org.zln.thread;
 2 
 3 import java.util.Date;
 4 
 5 /**
 6  * Created by coolkid on 2015/6/21 0021.
 7  */
 8 public class TestThread extends Thread{
 9     private int time;//休眠时间
10     private String user;//调用用户
11 
12     public TestThread(int time, String user) {
13         this.time = time;
14         this.user = user;
15     }
16 
17     @Override
18     public void run() {
19         while (true){
20             try {
21                 System.out.println(Thread.currentThread().getName()+"\t"+user+" 休息 "+time+"ms-"+new Date());
22                 Thread.sleep(time);
23             } catch (InterruptedException e) {
24                 e.printStackTrace();
25             }
26         }
27     }
28 
29     public static void main(String[] args) {
30         Thread thread1 = new TestThread(1000,"Jack");
31         Thread thread2 = new TestThread(3000,"Mike");
32         thread2.setPriority(Thread.MAX_PRIORITY);
33         thread1.start();
34         thread2.start();
35     }
36 }