acquire嘗試獲取資源，成功則直接返回，不成功則進(jìn)入等待隊(duì)列，這個(gè)過程不會(huì)被線程中斷，被外部中斷也不響應(yīng)，獲取資源后才再進(jìn)行自我中斷selfInterrupt()；

/**
     * Convenience method to interrupt current thread.
     */
    static void selfInterrupt() {
        Thread.currentThread().interrupt();
    }

acquireInterruptibly支持響應(yīng)中斷

public final void acquireInterruptibly(int arg)
            throws InterruptedException {
        if (Thread.interrupted())
            throw new InterruptedException();
        if (!tryAcquire(arg))
            doAcquireInterruptibly(arg);
    }