相关疑难解决方法(0)

假设我们有这两个Runnables:

class R1 implements Runnable {
    public void run() { … }
    …
}

class R2 implements Runnable {
    public void run() { … }
    …
}

那么这有什么区别:

public static void main() {
    R1 r1 = new R1();
    R2 r2 = new R2();

    r1.run();
    r2.run();
}

还有这个:

public static void main() {
    R1 r1 = new R1();
    R2 r2 = new R2();
    Thread t1 = new Thread(r1);
    Thread t2 = new Thread(r2);

    t1.start();
    t2.start();
}

你什么时候打电话给Java thread.run()而不是thread.start()？