Thread类的常见问题

void waitForSignal()
{
    Object obj = new Object();
    synchronized(Thread.currentThread())
    {
        obj.wait();
        obj.notify();
    }
}

        void waitForSignal () {

            Object obj = new Object();

            synchronized (obj) {

                try {

                    obj.wait();

                } catch (InterruptedException e) {

                    e.printStackTrace();

                }

                obj.notify();

            }

        }