适配器（二）

接口A：

packagecom.jerry.design.adapter2.imp;

 

publicinterfaceInterfaceA {

 

publicvoidtestA();

 

}

接口B：

packagecom.jerry.design.adapter2.imp;

 

publicinterfaceInterfaceB {

 

publicvoidtestB();

 

}

实现类A：

packagecom.jerry.design.adapter2.impl;

 

importcom.jerry.design.adapter2.imp.InterfaceA;

 

 

publicclassImplAimplementsInterfaceA{

 

@Override

publicvoidtestA() {

 

System.out.println(" i am do something as InterfaceA!");

 

}

 

}

 

实现类B：

 

packagecom.jerry.design.adapter2.impl;

 

importcom.jerry.design.adapter2.imp.InterfaceB;

 

publicclassImplBimplementsInterfaceB{

 

@Override

publicvoidtestB() {

 

System.out.println(" i am do something as InterfaceB!");

 

}

 

}

实现类C：

package com.jerry.design.adapter2.impl;

import com.jerry.design.adapter2.imp.InterfaceA;

import com.jerry.design.adapter2.imp.InterfaceB;

public class ImplC implements InterfaceB,InterfaceA{

private InterfaceA implA;

private InterfaceB implB;

public ImplC(InterfaceA implA,InterfaceB implB){

this.implA = implA;

this.implB = implB;

}

@Override

public void testB() {

implA.testA();

}

@Override

public void testA() {

implB.testB();

}

}

测试类：

package com.jerry.design.adapter2.client;

import com.jerry.design.adapter2.imp.InterfaceA;

import com.jerry.design.adapter2.imp.InterfaceB;

import com.jerry.design.adapter2.impl.ImplA;

import com.jerry.design.adapter2.impl.ImplB;

import com.jerry.design.adapter2.impl.ImplC;

public class Test {

public static void main(String[] args) {

InterfaceA implA = (InterfaceA) new ImplA();

InterfaceB implB = (InterfaceB) new ImplB();

InterfaceA implC = (InterfaceA) new ImplC(implA,implB);

InterfaceB implD = (InterfaceB) new ImplC(implA,implB);

implC.testA();// i am do something as InterfaceB!

implD.testB();// i am do something as InterfaceA!

}

}

总结：正向反向均可适配。