单例模式在JDK应用的源码分析

单例模式在jdk中的源码分析

1. 在我们JDK中,java.lang.Runtime就是经典的单例模式(恶汉式)

2. 代码分析+Debug源码+代码说明

public class Runtime {private static Runtime currentRuntime = new Runtime();/*** Returns the runtime object associated with the current Java application.* Most of the methods of class <code>Runtime</code> are instance* methods and must be invoked with respect to the current runtime object.** @return  the <code>Runtime</code> object associated with the current*          Java application.*/public static Runtime getRuntime() {return currentRuntime;}/** Don't let anyone else instantiate this class */private Runtime() {}

跟多:http://victorfengming.gitee.io/design_pattern/