class="java" name="code">//java单例模式-懒加载(保证线程安全性) public static class SingletonOptimizeLazy { static SingletonOptimizeLazy instance = null; public static SingletonOptimizeLazy getInstance() { if (instance == null) { createInstance(); } return instance; } private synchronized static SingletonOptimizeLazy createInstance() { if (instance == null) { instance = new SingletonOptimizeLazy(); } return instance; } }
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