问题描述
看看下面的代码:
public class ThreadTest {
public static void main(String[] args) {
new Thread(new Runnable() {
@Override
public void run() {
while(true) {
//some code here
}
}
}).start();
System.out.println("End of main");
}
}
通常，当到达main的结尾时，程序终止.但是在此示例中，程序将打印"main of End"，然后继续运行，因为线程仍在运行.有没有一种方法可以使线程在结束时自动 停止，而无需使用while(isRunning)之类的东西?
Normally, when the end of main is reached, the program terminates. But in this example, the program will prints "End of main" and then keeps running because the thread is still running. Is there a way that the thread can stop automatically when the end is reached, without using something like while(isRunning)?
推荐答案
您创建的线程是独立的，并且不依赖于主线程终止.您可以使用Daemon线程. 守护进程线程将在没有其他线程在运行时被JVM终止，它也包括一个执行主线程.
The thread you are creating is independent and does not depends on the Main Thread termination. You can use Daemon thread for same. Daemon threads will be terminated by the JVM when there are none of the other threads running, it includes a main thread of execution as well.
public static void main(String[] args) {
Thread t = new Thread(new Runnable() {
@Override
public void run() {
while (true) {
System.out.println("Daemon thread");
}
}
});
t.setDaemon(true);
t.start();
System.out.println("End of main");
}
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