public boolean hasNext() {
            while (nextEntry != null) {
                if (nextEntry.keyRef.get() != null)
                    return true;
                advance();
            }

            return false;
        }
Returns an enumeration of the values in this table.

@return an enumeration of the values in this table
@see #values()
commons-profiler/src/main/java/com/navercorp/pinpoint/common/profiler/concurrent/jsr166/ConcurrentWeakHashMap.java