<span style="font-size:18px;">我们通常在主线程中创建子线程来执行特定任务,那么问题来了,子线程如果未执行完毕,主线程会退出吗?</span></span></span>
<span style="font-size:18px;">带着这个疑问,我们看下面的小demo</span>
public class Main {
public Main() {
// TODO Auto-generated constructor stub
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new Thread(new Runnable() {
public void run() {
while (true) {
System.out.println("child thread running!");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
}
}
}).start();
System.out.println("main thread running!");
}
}
执行结果:
main thread running!
child thread running!
child thread running!
child thread running!
child thread running!
child thread running!
child thread running!
child thread running!
child thread running!
可以看出,子线程还在执行(死循环),主线程已经执行完毕了,但此时进程仍未退出(可以从任务管理器中查看到javaw.exe的进程)。