java实验策略模式、观察者模式和组合模式

1、实验二 策略模式、观察者模式和组合模式一、实验目的： （1）学习和掌握策略模式；（2）学习和掌握观察者模式；（3）学习和掌握组合模式；（4）学习和掌握使用这些模式解决实际问题；二、实验内容1. 请使用策略模式实现下列编程要求：已知几何形状家族有圆形、矩形、椭圆 形、三角形等形状。 请用 Java 语言定义一个抽象类 MyShape 表示形状这样概念，MyShape 抽象类中提供了计算面积、 周长、显示形状信息的抽象方法， 然后分别 定义它的子类 MyCircle （圆形）、 MyRectangle（矩形）、 MyEllipse （椭圆形）、 MyTriangle（三角形） 等特定几何形状。 并

2、绘制这些定义的几何家族的所有形状。2请用观察者模式实现功能：学校发布信息，学生可以订阅，老师可以订阅， 行政人员也可以订阅。提示：定义主题接口，观察者接口，定义 Notice 、学生、 老师和行政人员类，定义测试类。其中 Notice 类实现主题接口，老师、学生和 行政人员实现观察者接口。 思考，如果要求实现学生和老师均可以订阅多个信息， 即除了订阅学校发布信息，也可以订阅所属系发送的信息，请编程实现。3定义一个游戏地图。地图是由每个方块拼合起来。地图上有墙等障碍物，也 有可以通行的基本图元构成。 请使用组合模式， 绘制一个游戏地图， 地图的内容 自行定义，也可以类似图 3 形式：图 3 游戏

3、地图4已知有一个二维数组数据如图 1 所示，请结合策略模式、观察者模式和组合 模式实现一个 MVC 结构的应用程序。要求：如果用户移动滑块，可以修改二维 数组的值， 并在运行的用户界面中显示出来。 其中，饼状图和柱状图中的区域分 布为二位数组每一维的总和。运行结果如图 4和图 5所示。605090904030102070图4 数据模型图 5 运行结果三、实验环境1、PC微机；2、DOS操作系统或 Windows 操作系统；3、jdk 程序集成环境 Eclipse四、源代码、测试结果及 UML 图一： 1.UML 图DrawShape -shapes:List +DrawShape() +add

4、Shape(shape:MyShap e):void +paintComponent(g:Gr aphics):voidMyShape+area():float +perimeter():float +draw(g:Graphics): voidMyCircle -PI:float=3.14f -radius:int -x:int -y:int +MyCircle(x:int,y: int,radius:int) +area():float +perimeter():float +draw(g:Graphics) :void +toString():StringMyRectangleMyEll

5、ipse-width:int-PI:float=3.14f-height:int-aLong:int-x:int-bShort:int-y:int-x:int-y:int+MyRectangle(widt+MyEllipse(aLong:inh:int,height:int,x:int,t,bShort:int,x:int,y:inty:int)+area():float+area():float+perimeter():float+perimeter():float+draw(g:Graphics):+draw(g:Graphics):vvoidoid+toString():String+t

6、oString():StringMyTriangle -xPoints:int -yPoints:int -a:int -b:int -c:int -n:int +MyTriangle(xPoin ts:int,yPoints:int, a:int,b:int,c:int,n:int ) +area():float +perimeter():float +draw(g:Graphics): void +toString():String2. 源程序代码：package course.strategy.shape;import java.awt.Graphics;import java.util

7、.ArrayList;import java.util.List;import javax.swing.JPanel;/绘制所有图形SuppressWarnings(serial) public class DrawShape extends JPanel private List shapes;public DrawShape() shapes=new ArrayList();public void addShape(MyShape shape)/添加图形if(shape!=null) shapes.add(shape);public void paintComponent(Graphics

8、 g)/依次绘制图形for(MyShape ms:shapes)ms.draw(g);System.out.println(ms);package course.strategy.shape;import java.awt.Graphics;/形状家族public abstract class MyShape public abstract float area();public abstract float perimeter();public abstract void draw(Graphics g); package course.strategy.shape;import java.

9、awt.Color;import java.awt.Graphics;/圆形public class MyCircle extends MyShape private static final float PI=3.14f; private int radius;/定义圆形半径private int x,y;/定义起点( x,y )坐标public MyCircle(int x,int y,int radius)/构造函数super(); this.x=x; this.y=y;this.radius = radius;Overridepublic String toString() retur

10、n MyCircle radius= + radius + , x 坐标 = + x + , y 坐标 = + y + + 面积 =+area()+, 周长 =+perimeter();Overridepublic void draw(Graphics g) / 绘制图形/ TODO 自动生成的方法存根 g.setColor(Color.blue); g.fillOval(x, y, 2*radius, 2*radius);、package course.strategy.shape;import java.awt.Color;import java.awt.Graphics;/矩形publi

11、c class MyRectangle extends MyShape private int x,y;/定义起点( x,y )坐标private int width,height;/ 定义矩形的宽和高public MyRectangle(int x,int y,int width, int height) super();this.x=x;this.y=y;this.width = width;this.height = height;Overridepublic float perimeter() / TODO 自动生成的方法存根return 2*(width+height);Overri

12、depublic String toString() return MyRectangle x 坐标 = + x + , y 坐标 = + y + , 矩形宽 = + width+ , 矩形高 = + height + + 面积 =+area()+, 周长 =+perimeter();Overridepublic void draw(Graphics g) / TODO 自动生成的方法存根 g.setColor(Color.green); g.fillRect(x, y, width, height);、package course.strategy.shape;import java.awt

13、.Color;import java.awt.Graphics;/椭圆形public class MyEllipse extends MyShape private static final float PI=3.14f;private int x,y;/定义起点( x,y )坐标private int aLong,bShort; / 定义椭圆的长轴和短轴public MyEllipse(int x, int y,int aLong, int bShort) super();this.x = x;this.y = y;this.aLong = aLong;this.bShort = bShor

14、t;Override public String toString() return MyEllipse x 坐标 = + x + , y 坐标 = + y + , 长轴 = + aLong+ , 短轴 = + bShort + +面积 =+area()+, 周长 =+perimeter();Overridepublic void draw(Graphics g) / TODO 自动生成的方法存根 g.setColor(Color.red); g.fillOval(x, y, aLong, bShort);、package course.strategy.shape;import java.a

15、wt.Color;import java.awt.Graphics;/三角形public class MyTriangle extends MyShape private int a,b,c,n;private int xPoints;private int yPoints;public MyTriangle( int xPoints, int yPoints,int n,int a,int b,int c) super();this.xPoints = xPoints;this.yPoints = yPoints;this.n = n; this.a=a; this.b=b; this.c=

16、c;Overridepublic String toString() return MyTriangle a= + a + , b= + b + , c= + c + + 面积 =+area()+, 周长 =+perimeter(); Override public void draw(Graphics g) / TODO 自动生成的方法存根 g.setColor(Color.yellow); g.fillPolygon(xPoints, yPoints, n);package course.strategy.shape;import javax.swing.JFrame;/测试绘制所有形状/

17、测试程序public class Test * param args*/public static void main(String args) / TODO 自动生成的方法存根 JFrame frame=new JFrame();DrawShape ds=new DrawShape();ds.addShape(new MyCircle(20,20,60);ds.addShape(new MyRectangle(200,20,120,100);ds.addShape(new MyEllipse(40,200,150,100);int xPoints=300,240,370;int yPoint

18、s=200,280,300;ds.addShape(new MyTriangle(xPoints,yPoints,3,9,12,15);frame.getContentPane().add(ds);frame.setTitle( 绘制图形演示 );frame.setSize(500,400);frame.setVisible( true ); frame.setDefaultCloseOperation(JFrame. EXIT_ON_CLOSE ); 3. 测试结果图： 1.UML 图：SubjectObserver+registerObserver(ob server:Observer):

19、void +removeObserver(ob server:Observer):void +notifyAllObservers( ):void+getNotice(message:String):voidDepartmentNoticeNotice-observers:List-message:String-observers:List-message:String+DepartmentNotice() +registerObserver(obser ver:Observer):void +removeObserver(obser ver:Observer):void +notifyAll

20、Observers():v oid+setMessage (str:String):void +getMessage():String+Notice() +registerObserver(obser ver:Observer):void +removeObserver(obser ver:Observer):void +notifyAllObservers():v oid+setMessage (str:String):void +getMessage():StringTeacherStudent+getNotice(mess age:String):void+getNotice(mess

21、age:String):void+getNotice(mess age:String):voidAdministrator2.源代码：package course.observer.notice;/主题public interface Subject public void registerObserver(Observer observer); public void removeObserver(Observer observer); public void notifyAllObservers();package course.observer.notice;import java.ut

22、il.ArrayList;import java.util.Iterator;import java.util.List;/学校通知public class Notice implements Subject private List observers;private String message;public Notice()observers=new ArrayList();Overridepublic void removeObserver(Observer observer) / TODO 自动生成的方法存根if(observers.contains(observer) observ

23、ers.remove(observer);Overridepublic void notifyAllObservers() / TODO 自动生成的方法存根for(Iterator it=observers.iterator();it.hasNext();)Observer o=it.next();o.getNotice(getMessage();public void setMessage(String str)this.message=str;public String getMessage()return message;、package course.observer.notice;i

24、mport java.util.ArrayList;import java.util.Iterator;import java.util.List;/学院通知public class DepartmentNotice implements Subject private List observers;private String message;public DepartmentNotice()observers=new ArrayList();Overridepublic void registerObserver(Observer observer) / TODO 自动生成的方法存根obs

25、ervers.add(observer);Overridepublic void removeObserver(Observer observer) / TODO 自动生成的方法存根 observers.remove(observer);Overridepublic void notifyAllObservers() / TODO 自动生成的方法存根for(Iterator it=observers.iterator();it.hasNext();) Observer o=it.next();o.getNotice(getMessage();public void setMessage(Str

26、ing str)this.message=str;public String getMessage()return message;package course.observer.notice;/观察者public interface Observer public void getNotice(String message); package course.observer.notice; /具体观察者，教师 public class Teacher implements Observer Overridepublic void getNotice(String message) / TOD

27、O 自动生成的方法存根 System.out.println( 教师收到通知： +message);package course.observer.notice; /具体观察者，学生 public class Student implements Observer Overridepublic void getNotice(String message) / TODO 自动生成的方法存根System.out.println( 学生收到通知： +message);package course.observer.notice; /具体观察者，行政人员 public class Administra

28、tor implements Observer Overridepublic void getNotice(String message) / TODO 自动生成的方法存根System.out.println( 行政人员收到通知： +message); package course.observer.notice;/测试程序public class Test * param args*/public static void main(String args) / TODO 自动生成的方法存根Notice notice= new Notice();DepartmentNotice depart=

29、 new DepartmentNotice();Observer tea,stu,admin;tea=new Teacher();stu=new Student(); admin=new Administrator();notice.registerObserver(tea); notice.registerObserver(stu);notice.registerObserver(admin);depart.registerObserver(tea); depart.registerObserver(stu);notice.setMessage(学校通知：五一全体放假七天。 。 ); dep

30、art.setMessage(学院通知： 这个礼拜周末补课， 请各位做好心里准备。 。); notice.notifyAllObservers();System.out.println();depart.notifyAllObservers();System.out.println();notice.removeObserver(tea);notice.notifyAllObservers();3.测试结果图： 1.UML 图2.源代码package posite.gameMap;import java.awt.Dimension;import java.awt.Graphics;import

31、 javax.swing.JPanel;SuppressWarnings(serial)public abstract class GameComponent extends JPanel public abstract void paintComponent(Graphics g); public Dimension getPreferredSize() return new Dimension(50,50);package posite.gameMap;import java.awt.Graphics;import java.awt.Image;import javax.swing.Bor

32、derFactory;import javax.swing.ImageIcon;SuppressWarnings(serial)public class Grass extends GameComponent private ImageIcon icon;private Image image;public Grass() setBorder(BorderFactory.createEmptyBorder(); icon=new ImageIcon(src/images/grass.jpg); image=icon.getImage();Overridepublic void paintCom

33、ponent(Graphics g) / TODO 自动生成的方法存根g.drawImage(image,0,0,getWidth(),getHeight(),this); package posite.gameMap;import java.awt.Graphics;import java.awt.Image;import javax.swing.ImageIcon;SuppressWarnings(serial)public class House extends GameComponent private ImageIcon icon;private Image image; publi

34、c House()icon=new ImageIcon(src/images/house.jpg); image=icon.getImage(); Override public void paintComponent(Graphics g) / TODO 自动生成的方法存根g.drawImage(image,0,0,getWidth(),getHeight(),this); package posite.gameMap;import java.awt.Graphics;import java.awt.Image;import javax.swing.ImageIcon;SuppressWar

35、nings(serial )public class Tree extends GameComponent private ImageIcon icon;private Image image;public Tree()icon=new ImageIcon( src/images/tree.jpg ); image=icon.getImage();Overridepublic void paintComponent(Graphics g) / TODO 自动生成的方法存根g.drawImage(image,0,0,getWidth(),getHeight(), this ); package

36、posite.gameMap;import java.awt.Graphics;import java.awt.Image;import java.io.File;import javax.imageio.ImageIO;import javax.swing.ImageIcon;SuppressWarnings(serial)public class Wall extends GameComponentprivate ImageIcon icon;private Image image;public Wall()icon=new ImageIcon(src/images/wall.jpg);i

37、mage=icon.getImage();Override public void paintComponent(Graphics g) / TODO 自动生成的方法存根 tryimage=ImageIO.read(new File(src/images/wall.jpg); g.drawImage(image,0,0,getWidth(),getHeight(),this);catch(Exception e) e.printStackTrace();package posite.gameMap;import java.awt.Graphics;import java.awt.Image;i

38、mport javax.swing.ImageIcon;SuppressWarnings(serial) public class Road extends GameComponent private ImageIcon icon;private Image image;public Road()icon=new ImageIcon(src/images/road.jpg); image=icon.getImage();Overridepublic void paintComponent(Graphics g) / TODO 自动生成的方法存根 g.drawImage(image,0,0,ge

39、tWidth(),getHeight(),this);package posite.gameMap;import java.awt.Color;import java.awt.Container;import java.awt.GridLayout;import javax.swing.JFrame;/测试程序SuppressWarnings(serial)public class Test extends JFrame private GridLayout layout;private int map=1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,3,0,0,2,0,0,0

40、,0,0,2,0,0,3,1,1,3,0,0,0,1,1,3,1,1,0,0,0,3,1,1,0,0,4,0,0,0,0,0,0,0,4,0,0,1,1,0,1,0,1,1,1,0,1,1,1,0,1,0,1,1,0,1,0,0,3,0,0,0,3,0,0,1,0,1,1,0,1,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,0,0,0,0,0,0,0,0,1,0,1,1,0,0,4,0,0,1,3,1,0,0,4,0,0,1,1,0,0,0,1,1,1,3,1,1,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,3,3

41、,3,0,0,1,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,1,0,1,1,2,0,0,0,4,3,4,3,4,0,0,0,2,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1;public Test()super( 游戏地图演示 );Container container=getContentPane();layout=new GridLayout(15,15);container.setLayout(layout);/设置 15 行 *15 列的网格布局Color c=new Color(60,90,0); container.setBackground(

42、c);/ 设置窗口背景颜色for(int i=0;ilayout.getRows();i+)for(int j=0;jlayout.getColumns();j+) switch(mapij) case 0:container.add(new Road();break; case 1:container.add(new Wall();break; case 2:container.add(new House();break; case 3:container.add(new Grass();break; case 4:container.add(new Tree();break;setSize

43、(600,600); setVisible(true);/* param args*/public static void main(String args) / TODO 自动生成的方法存根Test t=new Test(); t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);3.测试结果图SuMi-函脚們冊刪I訓刚|嘲卅删制側曲刪l;F刚渤即0 一IB II! !S!：Model+setData(index:int,value:int):void+getData():int+addObserver(o:View):voi d+removeOb

44、server(o:View) :void+notifyObservers():voidView+addView(v:View)void+removeView(v:View) void +update(data:int):voidDataModel -data:int -observers: List +DataModel() +setData(index:int,value:i nt):void +getData():int +addObserver(o:View):v oid +removeObserver(o:Vie w):void +notifyObservers():voidTable

45、ViewPieViewHistogramView-data:int-startX:int=20-startY:int=20-data:int-data:int-WIDTH:int=30+addView(v:View) void+removeView(v:Vi ew)void +update(data:int): void +paintComponent( g:Graphics):void+addView(v:View) void+removeView(v:Vi ew)void +update(data:int): void +paintComponent( g:Graphics):void+a

46、ddView(v:View )void +removeView(v:V iew)void +update(data:int) :void +paintComponent( g:Graphics):voidFrameView -data:int -views: List +FrameView() +addView(v:View) void +removeView(v:Vi ew)void +update(data:int): voidFrameController -FPS_MIN:int=0 -FPS_MAX:int=100 -FPS_INIT:int=50 -sliders:JSlider

47、-model:Model +FrameController(m: Model)2.源代码 package course.MVC; public interface Model public void setData(int index, int value); public int getData();public void addObserver(View o);public void removeObserver(View o); public void notifyObservers();for(int i=0;idata.length;i+) datai=5;Overridepubli

48、c void setData(int index, int value) / TODO 自动生成的方法存根 this.dataindex=value; notifyObservers();Overridepublic void addObserver(View o) / TODO 自动生成的方法存根if (o = null)throw new NullPointerException();if (!observers.contains(o)observers.add(o);Overridepublic void removeObserver(View o) / TODO 自动生成的方法存根 i

49、f(observers.contains(o) observers.remove(o);Overridepublic void notifyObservers() / TODO 自动生成的方法存根for(Iterator it=observers.iterator();it.hasNext();) View observer=it.next(); observer.update(this.data);Overridepublic int getData() / TODO 自动生成的方法存根 return data;package course.MVC; public interface Vie

50、w public abstract void addView(View v);/添加视图public abstract void removeView(View v);/删除视图public abstract void update(int data); / 更新视图、package course.MVC;import java.awt.Color;import java.awt.Graphics;import javax.swing.JPanel;/表格图SuppressWarnings(serial)public class TableView extends JPanel impleme

51、nts View private int data=60,50,90,90,40,30,10,20,70;private static final int startX=20;private static final int startY=20;public void paintComponent(Graphics g) super.paintComponent(g); for(int i=0;i3;i+) for(int j=0;j3;j+) g.setColor(Color.black); g.drawRect(startX+50*j,startY+50*i,50,50); g.drawString( +datai*3+j, 45+50*j, 45+50*i);Overridepublic void addView(View v) / TODO 自动生成的方法存根System.out.println( 不允许添加视图！ );Overridepublic void removeView(Vi