Java ThreadGroup resume()方法

ThreadGroup類的resume()方法用於恢復使用suspend()方法掛起的線程組中的所有線程。

語法

public final void resume()

返回
沒有返回值。

異常

• SecurityException：如果不允許當前線程訪問線程組或線程組中的任何線程，則拋出此異常。

示例

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 ThreadGroupResumeExp
{
    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();
        // this will suspend all the threads
        tg1.suspend();

        // creating another thread
        NewThread t2 = new NewThread("Thread-2", tg2);
        System.out.println("Starting of Thread-2");
        t2.start();

        // this will resume all the threads suspended by tg1
        tg1.resume();
    }
}

執行上面示例代碼，得到以下結果：

Starting of Thread-1
Starting of Thread-2
Thread-2 completed executing
Thread-1 completed executing