>它将告诉当前正在执行的线程进入休眠状态(不使用任何cpu).
>它将释放锁定,以便其他线程可以唤醒并锁定.@H_404_2@

每当方法在同步块内部执行某些操作时,块中的任何内容都必须等待释放锁定的对象.@H_404_2@

@H_404_2@

synchronized (lockObject) {
    // someone called notify() after taking the lock on
    // lockObject or entered wait() so now it's my turn

    while ( whatineedisnotready) {
        wait(); // release the lock so others can enter their check
        // now,if there are others waiting to run,they 
        // will have a chance at doing so.
    }
}

必读：@H_404_2@

java synchronized