软件设计与体系结构复习整理题目及答案(6)

f2.validate(); } }

class MyFrame extends JFrame{ String str;

MyFrame(String title){ setTitle(title);

Moon moon=Moon.getMoon(); str=moon.show();

setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); setVisible(true); repaint(); }

public void paint(Graphics g){ super.paint(g);

g.setFont(new Font(\宋体\ g.drawString(str,5,100); } }

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工厂方法模式（别名：虚拟构造）

定义一个用于创建对象的接口，让子类决定实例化哪一个类。Factory Method使一个类的实例化延迟到其子类。

模式的结构中包括四种角色： 抽象产品（Product）

具体产品（ConcreteProduct） 构造者（Creator）

具体构造者（ConcreteCreator）

1．抽象产品（Product） : PenCore.java public abstract class PenCore{ String color;

public abstract void writeWord(String s); }

2．具体产品（ConcreteProduct）_1 : RedPenCore.java public class RedPenCore extends PenCore{ RedPenCore(){ color=\红色\ }

public void writeWord(String s){

System.out.println(\写出\的字:\ } }

3．构造者（Creator）:BallPen.java public abstract class BallPen{ BallPen(){

System.out.println(\生产了一只装有\笔芯的圆珠笔\ }

public abstract PenCore getPenCore(); //工厂方法 }

4．具体构造者（ConcreteCreator）: RedBallPen.java

public class RedBallPen extends BallPen{

public PenCore getPenCore(){ return new RedPenCore(); } }

BlueBallPen.java

public class BlueBallPen extends BallPen{ public PenCore getPenCore(){ return new BluePenCore(); } }

BlackBallPen.java

public class BlackBallPen extends BallPen{ public PenCore getPenCore(){ return new BlackPenCore(); } }

5．应用 Application.java public class Application{

public static void main(String args[]){ PenCore penCore;

BallPen ballPen=new BlueBallPen(); penCore=ballPen.getPenCore();

penCore.writeWord(\你好,很高兴认识你\ ballPen=new RedBallPen(); penCore=ballPen.getPenCore();

penCore.writeWord(\ ballPen=new BlackBallPen(); penCore=ballPen.getPenCore();

penCore.writeWord(\ } }

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抽象工厂模式：

模式的结构中包括四种角色： 抽象产品（Prodcut）

具体产品（ConcreteProduct） 抽象工厂（AbstractFactory） 具体工厂（ConcreteFactory）

1．抽象产品（Product） : UpperClothes.java

public abstract class UpperClothes{

public abstract int getChestSize(); public abstract int getHeight(); public abstract String getName(); }

Trousers.java

public abstract class Trousers{

public abstract int getWaistSize(); public abstract int getHeight(); public abstract String getName(); }

2．具体产品（ConcreteProduct)_1: WesternUpperClothes.java public class WesternUpperClothes extends UpperClothes{ private int chestSize; private int height; private String name;

WesternUpperClothes(String name,int chestSize,int height){ this.name=name;

this.chestSize=chestSize; this.height=height; }

public int getChestSize(){ return chestSize; }

public int getHeight(){ return height; }

public String getName(){ return name; } }

2．具体产品（ConcreteProduct)_2: CowboyUpperClothes.java public class CowboyUpperClothes extends UpperClothes{ private int chestSize; private int height; private String name;

CowboyUpperClothes(String name,int chestSize,int height){ this.name=name;

this.chestSize=chestSize; this.height=height; }

public int getChestSize(){ return chestSize; }

public int getHeight(){

return height; }

public String getName(){ return name; } }

2．具体产品（ConcreteProduct)_3: WesternTrousers.java public class WesternTrousers extends Trousers{ private int waistSize; private int height; private String name;

WesternTrousers(String name,int waistSize,int height){ this.name=name;

this.waistSize=waistSize; this.height=height; }

public int getWaistSize(){ return waistSize; }

public int getHeight(){ return height; }

public String getName(){ return name; } }

2．具体产品（ConcreteProduct)_4: CowboyTrousers.java public class CowboyTrousers extends Trousers{ private int waistSize; private int height; private String name;

CowboyTrousers(String name,int waistSize,int height){ this.name=name;

this.waistSize=waistSize; this.height=height; }

public int getWaistSize(){ return waistSize; }

public int getHeight(){ return height; }

public String getName(){ return name;