java group方法,Java ThreadGroup destroy()方法

Java ThreadGroup destroy()方法

java.lang.ThreadGroup.destroy() 方法破坏该线程组及其所有子组。此线程组必须为空，表明已被该线程组中的所有线程都停止。

1 语法

public final void destroy()

2 参数

filename ： 这是加载文件。

3 返回值

此方法不返回任何值。

4 示例

package com.yiidian;

/**

* 一点教程网： http://www.yiidian.com

*/

/**

* Java ThreadGroup destroy()方法

*/

import java.lang.*;

public class ThreadGroupDemo implements Runnable

{

public static void main(String[] args) {

ThreadGroupDemo tg = new ThreadGroupDemo();

tg.func();

}

public void func() {

try {

// create a parent ThreadGroup

ThreadGroup pGroup = new ThreadGroup("Parent ThreadGroup");

// create a child ThreadGroup for parent ThreadGroup

ThreadGroup cGroup = new ThreadGroup(pGroup, "Child ThreadGroup");

// create a thread

Thread t1 = new Thread(pGroup, this);

System.out.println("Starting " + t1.getName() + "...");

t1.start();

// create another thread

Thread t2 = new Thread(cGroup, this);

System.out.println("Starting " + t2.getName() + "...");

t2.start();

// block until the other threads finish

t1.join();

t2.join();

// child group destroyed

cGroup.destroy();

System.out.println(cGroup.getName() + " destroyed");

// parent group destroyed

pGroup.destroy();

System.out.println(pGroup.getName() + " destroyed");

}

catch (InterruptedException ex) {

System.out.println(ex.toString());

}

}

// implements run()

public void run() {

for(int i=0;i<1000;i++) {

i++;

}

System.out.println(Thread.currentThread().getName() +

" finished executing.");

}

}

输出结果为：

Starting Thread-0...

Starting Thread-1...

Thread-0 finished executing.

Thread-1 finished executing.

Child ThreadGroup destroyed

Parent ThreadGroup destroyed