package com.jerry.design.adapter1.imp;

public interface InterfaceA {

public void testA();

}

接口实现类：

package com.jerry.design.adapter1.impl;

import com.jerry.design.adapter1.imp.InterfaceA;

public class ImplA implements InterfaceA{

@Override

public void testA() {

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

}

}

目标接口：

package com.jerry.design.adapter1.imp;

public interface InterfaceB {

public void testB();

}

目标接口实现类：

package com.jerry.design.adapter1.impl;

import com.jerry.design.adapter1.imp.InterfaceA;

import com.jerry.design.adapter1.imp.InterfaceB;

public class ImplB implements InterfaceB{

private InterfaceA implA;

public ImplB(InterfaceA implA){

this.implA = implA;

}

@Override

public void testB() {

implA.testA();

}

}

测试方法：

package com.jerry.design.adapter1.client;

import com.jerry.design.adapter1.imp.InterfaceA;

import com.jerry.design.adapter1.imp.InterfaceB;

import com.jerry.design.adapter1.impl.ImplA;

import com.jerry.design.adapter1.impl.ImplB;

public class Test {

public static void main(String[] args) {

InterfaceA implA = (InterfaceA) new ImplA();

InterfaceB implB = (InterfaceB) new ImplB(implA);

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

}

}

总结：原接口转换为目标接口