Design Mode 8 -- adapter Mode

Design Mode directory:

Design Pattern 1 -- Observer Pattern

Design Pattern 2 -- decorator pattern

Design Pattern 3 -- iterator and combination pattern (iterator)

Design Pattern 4 -- iterator and combination pattern (combination)

Design Mode 5-work mode

Design Mode 6-single-piece Mode

Design Mode 7 -- command mode

Design Mode 8 -- adapter Mode

 

Overview

Part 1 Introduction

Part 1 Implementation

Part 1 Definition

 

Part 1 Introduction

What is the OO adapter? In reality, it is everywhere. For example, if you want to use a laptop made in the United States in European countries, you may need an AC adapter. In fact, the OO adapter and the real-world adapter play the same role; convert one interface to another to meet the customer's expectations.

 

Part 1 Implementation

See the adapter implementation in use:

The first is the Duck interface:

 1 /** 2  * 鸭子接口 3  * @ClassName: Duck 4  * TODO 5  * @author Xingle 6  * @date 2014-10-9 下午3:33:04 7  */ 8 public interface Duck { 9     10     public void quack();11     public void fly();12 13 }

 

A child of a duck

 1 /** 2  * 绿头鸭  3  * @ClassName: MallardDuck 4  * TODO 5  * @author Xingle 6  * @date 2014-10-9 下午3:38:54 7  */ 8 public class MallardDuck implements Duck{ 9 10     @Override11     public void quack() {12         System.out.println("Quack");13     }14 15     @Override16     public void fly() {17         System.out.println("I‘m flying.");18     }19 20 }

 

Turkey:

 1 /** 2  * 火鸡 3  * @ClassName: Turkey 4  * TODO 5  * @author Xingle 6  * @date 2014-10-9 下午3:54:37 7  */ 8 public interface Turkey { 9     10     public void gobble();11     public void fly();12 13 }

 

 

 1 /** 2  * 火鸡的具体实现类 3  * @ClassName: WildTurkey 4  * TODO 5  * @author Xingle 6  * @date 2014-10-9 下午3:55:23 7  */ 8 public class WildTurkey implements Turkey{ 9 10     @Override11     public void gobble() {12         System.out.println("Gobble gobble.");13     }14 15     @Override16     public void fly() {17         System.out.println("I‘m flying a short distance.");18     }19 20 }

 

Duck adapter:

 1 /** 2  * 鸭子适配器 3  * @ClassName: TurkeyAdapter 4  * TODO 5  * @author Xingle 6  * @date 2014-10-9 下午3:58:12 7  */ 8 public class TurkeyAdapter implements Duck{ 9     10     Turkey turkey;11     12     public TurkeyAdapter(Turkey turkey){13         this.turkey = turkey;14     }15 16     @Override17     public void quack() {18         turkey.gobble();19     }20 21     @Override22     public void fly() {23         for(int i=0;i<5;i++){24             turkey.fly();25         }26         27     }28 29 }

 

Test procedure:

 1 /** 2  *  3  * @ClassName: TurkeyTestDrive 4  * TODO 5  * @author Xingle 6  * @date 2014-10-9 下午4:03:21 7  */ 8 public class TurkeyTestDrive { 9     public static void main(String[] args){10         MallardDuck duck = new MallardDuck();11         WildTurkey turkey = new WildTurkey();12         13         Duck turkeyAdapter = new TurkeyAdapter(turkey);14         System.out.println("The Turkey says...");15         turkey.gobble();16         turkey.fly();17         18         System.out.println("\nThe Duck says...");19         testDuck(duck);20         21         System.out.println("\nThe TurkeyAdapter says...");22         testDuck(turkeyAdapter);23     }24 25      static void testDuck(Duck duck) {26          duck.quack();27          duck.fly();28     }29 30 }

 

Execution result:

 

Part 1 Definition

The adapter is

Design Mode 8 -- adapter Mode