解读设计模式（Java）

1、代理设计模式；

//引自《Java 编程思想》第四版（中文版）第131页。class SpaceShipControls {void up(int velocity){}// ...}public class SpaceShipDelegation {private SpaceShipControls controls = new SpaceShipControls();public void up(int velocity) {controls.up(velocity);}// ...public static void main(String[] args) {// ...}}

 

2、单例设计模式；

public class Singleton {private static Singleton instance;private Singleton() { };public static Singleton getInstance() {if(instance == null)instance = new Singleton();return instance;}}