集合框架 Map篇(5)----ConcurrentSkipListMap - 每天进步一点点...... - ITeye技术网站


         在非多线程的情况下,应当尽量使用TreeMap。此外对于并发性相对较低的并行程序可以使用Collections.synchronizedSortedMap将TreeMap进行包装,也可以提供较好的效率。对于高并发程序,应当使用ConcurrentSkipListMap,能够提供更高的并发度。 3.每一个级别都是其更低级别的子集,并且是有序的; ------------------------ ConcurrentSkipListMap主要用到了Node和Index两种节点的存储方式,通过volatile关键字实现了并发的操作 ------------------------ ------------------------------------------------ ------------------------------------- -------- ----------- //put操作,通过doPut实现 public V put(K key, V value) { if (value == null) throw new NullPointerException(); return doPut(key, value, false); } private V doPut(K kkey, V value,

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