Java当前线程

Question

在执行多线程程序时，我对当前线程是什么感到困惑。

public class CurrentThread {

public static void main(String[] args) {
            // FROM HERE: will always be "main-thread" the current thread ?
    CurrentThread currentThread = new CurrentThread();
    currentThread.testCurrentThread();
            // TO HERE         
}

private void testCurrentThread() {
    // some other threads starts...
    AThread athread = new AThread();
    athread.start();
    // some other threads starts...
}

class AThread extends Thread {

    public AThread() {
        setName("thread-a");
    }

    public void run() {
        // FROM HERE: will always be thread-a the current thread during finish the run method ?
                    // some process
                    // TO HERE...
    }
}

假设在启动线程AThread前后启动多个线程:

1. 当您在 main 方法中时，无论何时调用 Thread.currentThread() 都会成为“主线程”？
2. 当您在 AThread 的 run 方法中时，无论何时调用 Thread.currentThread() 都会是“a-thread”？

提前致谢。

Answer 1

currentThread: Returns a reference to the currently executing thread object.

因此，当您在 main 方法中时，那是您的主线程，而当您在 AThread 的 run 方法中时，那是您的 a-thread。