Java ThreadGroup destroy() 方法

2024 年 11 月 11 日 | 阅读 1 分钟

ThreadGroup 类的 **destroy()** 方法用于销毁线程组及其所有子线程组。该线程组必须是空的，这意味着该线程组中的所有线程都已经停止。

语法

它不返回任何值。

Exception

IllegalThreadStateException：如果线程组不为空或线程组已被销毁，则抛出此异常。

SecurityException：如果当前线程无法修改此线程组。

示例

class NewThread extends Thread 
{
    NewThread(String threadname, ThreadGroup tg)
    {
        super(tg, threadname);
    }
    public void run()
    {
        for (int i = 0; i < 10; i++) 
        {
            try
            {
                Thread.sleep(10);
            }
            catch (InterruptedException ex) 
            {
              System.out.println(Thread.currentThread().getName() + " interrupted");
            }
        }
        System.out.println(Thread.currentThread().getName() +  " completed executing");
    }
} 
public class ThreadGroupDestroyExp
{
    public static void main(String arg[]) throws InterruptedException, SecurityException
    {
        // creating a ThreadGroup
        ThreadGroup g1 = new ThreadGroup("Parent thread");
        // creating a child ThreadGroup for parent ThreadGroup
        ThreadGroup g2 = new ThreadGroup(g1, "Child thread");
        
        // creating a thread 
        NewThread t1 = new NewThread("Thread-1", g1);
        t1.start();
        // creating another thread 
        NewThread t2 = new NewThread("Thread-2", g1);
        t2.start();
        
        // block until other thread is finished
        t1.join();
        t2.join();
 
        // destroying child threadGroup
        g2.destroy();
        System.out.println(g2.getName() + " destroyed");
        
        // destroying parent threadGroup
        g1.destroy();
        System.out.println(g1.getName() + " destroyed");
    }
}

输出

Thread-1 finished executing
Thread-2 finished executing
Child thread destroyed
Parent thread destroyed

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Java ThreadGroup destroy() 方法

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Java ThreadGroup destroy() 方法

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