关于单例模式
package com.ahuiby.demo1; class Dog{ //字段 private static Dog dog=new Dog(); //构造方法 private Dog(){} //方法 public static Dog getDog(){ return dog; } } public class Singleton { public static void main(String[] args) { // TODO Auto-generated method stub Dog d1=Dog.getDog(); Dog d2=Dog.getDog(); System.out.println(d1); System.out.println(d2); } }