src/share/classes/java/util/concurrent/ConcurrentSkipListSet.java

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*** 360,375 **** return m.higherKey(e); } public E pollFirst() { Map.Entry<E,Object> e = m.pollFirstEntry(); ! return e == null? null : e.getKey(); } public E pollLast() { Map.Entry<E,Object> e = m.pollLastEntry(); ! return e == null? null : e.getKey(); } /* ---------------- SortedSet operations -------------- */ --- 360,375 ---- return m.higherKey(e); } public E pollFirst() { Map.Entry<E,Object> e = m.pollFirstEntry(); ! return (e == null) ? null : e.getKey(); } public E pollLast() { Map.Entry<E,Object> e = m.pollLastEntry(); ! return (e == null) ? null : e.getKey(); } /* ---------------- SortedSet operations -------------- */