这是一段反编译出的代码，实际代码如何写呢？有个循环？

Question

public Object pop()
    {
        Object x;
        if(Thread.interrupted())
            return null;
        x = extract();
        if(x != null)
        {
            size--;
            return x;
        }
        Object obj = putLock;
        JVM INSTR monitorenter ;
        waitingForTake++;
_L1:
        x = extract();
        if(x == null)
            break MISSING_BLOCK_LABEL_79;
        waitingForTake--;
        size--;
        return x;
        putLock.wait();
          goto _L1
        InterruptedException ex;
        ex;
        waitingForTake--;
        putLock.notify();
        null;
        obj;
        JVM INSTR monitorexit ;
        return;
        Exception exception;
        exception;
        throw exception;
    }源代码应该怎么写呢？麻烦各位帮帮忙，谢谢。

Answer 1

反编译后的缺少了一些需要的信息。尤其是那个break MISSING_BLOCK_LABEL_79 到底跳转到什么位置不知道。只能大至给你翻译一下了。要想得到100%准确地翻译，用javap-c 把jvm指令打印出来，或者把class文件给我。[email protected]    public Object pop()
        {
            if(Thread.interrupted())
                return null;
            Object x = extract();
            if(x != null)
            {
                size--;
                return x;
            }
            synchronized(putLock)
            {
                waitingForTake++;
                for(;;)
                {
                    x = extract();
                    if (x !=null)
                    {
                        waitingForTake--;
                        size--;
                        return x;
                    }
                    try
                    {
                        putLock.wait();
                    }
                    catch(InterrupedException ex)
                    {
                        waitingForTak--;
                        putLock.notify();
                        return null;
                    }
                }
            }
        }