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java单例的几种实现方法

java单例的几种实现方法：方式1： public class Something { private Something() {} private static class LazyHolder { private static final Something INSTANCE = new Som...

java单例的几种实现方法：

方式1： public class Something { private Something() {} private static class LazyHolder { private static final Something INSTANCE = new Something(); } pu...

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