Java教程

Java线程组suspend()方法

ThreadGroup类的 suspend()方法用于挂起线程组中的所有线程。

语法

public final void suspend()

返回

此方法不返回任何值。

异常

安全性异常: 如果不允许当前线程访问该线程组或该线程组中的任何线程,则会引发此异常。

示例1

class NewThread extends Thread
{
    NewThread(String threadname, ThreadGroup tg)
    {
        super(tg, threadname);
    }
    public void run()
    {
        for(int i = 0;i < 10;i++)
        {
            i++;
        }
        System.out.println(Thread.currentThread().getName() + " completed executing");
    }
}
public class ThreadGroupSuspendExp
{
    public static void main(String arg[]) throws InterruptedException,
        SecurityException, Exception
    {
        // creating the threadGroup
        ThreadGroup tg1 = new ThreadGroup("Parent thread");
        ThreadGroup tg2 = new ThreadGroup(tg1, "Child thread");
        // creating a thread
        NewThread t1 = new NewThread("Thread-1", tg1);
        System.out.println("Starting of Thread-1");
        t1.start();
        // creating another thread
        NewThread t2 = new NewThread("Thread-2", tg2);
        System.out.println("Starting of Thread-2");
        t2.start();
        // this will suspend all the threads
        tg1.suspend();
    }
}
输出:
Starting of Thread-1
Starting of Thread-2

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