Conditions in Read/Write Locks

Question

In Java, since ReadLocks cannot have conditions, what is the proper way to use conditions between Read/Write locks?

Here is my concurrent queue class:

private class ConcurrentQ{
        ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
        Lock readLock = readWriteLock.readLock();
        Lock writeLock = readWriteLock.writeLock();
        Condition emptyList = writeLock.newCondition();
        Queue<Integer> list = new LinkedList<>();

        /* */
        public void push(int x, int thread){
            try{
                writeLock.lock();
                list.offer(x);
                emptyList.signalAll();
            } catch (Exception ex){
            } finally {
                writeLock.unlock();
            }
        }

        //Must look at empty case
        public void pop(int thread){
            int val = -1;
            try{
                writeLock.lock();
                val = list.poll();
            } catch (Exception e){
            } finally {
                writeLock.unlock();
            }
        }

        public void peek(int thread){
            int val = -2;
            try{
                readLock.lock();
                while(list.isEmpty())
                    emptyList.await(); //////PROBLEM HERE!
                val = list.peek();
            }  catch (Exception e) {
            } finally {
                readLock.unlock();
            }
        }
    }

There is a problem here. Since ReadLock cannot have conditions, I added a condition in the WriteLock BUT I cannot call it inside a block where I am using readLock.lock() ... readLock.unlock() so what can I do? In my peek() method I want to wait if the list is empty.

Thanks