Java ThreadGroup isDaemon() 方法

2024 年 11 月 11 日 | 阅读 1 分钟

ThreadGroup 类的 isDaemon() 方法用于测试此线程组是否为守护线程组。

语法

此方法返回 true，如果此线程组是守护线程组。否则，它将返回 false。

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() + " finished executing");
    }
}
public class ThreadGroupIsDaemonExp 
{
    public static void main(String arg[]) throws InterruptedException,
        SecurityException, Exception
    {
        // creating a threadGroup
        ThreadGroup tg = new ThreadGroup("Parent thread");
        // creating a thread 
        NewThread t1 = new NewThread("Thread-1", tg);
        t1.start();
        
        // returns false if this thread group is not a daemon thread group
        System.out.println("Is " + tg.getName() + " a daemon threadGroup? " + tg.isDaemon());
    }
}

输出

Is Parent thread a daemon threadGroup? false
Thread-1 finished executing

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Java ThreadGroup isDaemon() 方法

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Java ThreadGroup isDaemon() 方法

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