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Description: 这是一个成为更好的Java程序员的系列教程. Contribute to Vicky509/bestJavaer development by creating an account on GitHub.

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https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#effective-java---构造器私有枚举和单例
https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#饿汉式单例
https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#静态常量
https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#静态代码块
https://blog.csdn.net/ns_code/article/details/17881581https://blog.csdn.net/ns_code/article/details/17881581
https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#懒汉式单例
https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#尝试加锁
https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#同步代码块
https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#双重检查
https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#静态内部类单例
https://github.com/Vicky509/bestJavaer/blob/master/java-basic/effectivejava-privateconstructor.md#枚举单例
https://blog.csdn.net/u013256816/article/details/50525335https://blog.csdn.net/u013256816/article/details/50525335
单例模式的八种写法比较https://www.cnblogs.com/zhaoyan001/p/6365064.html
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