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以下编程要求：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， MyShapett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

2、：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 有可以通行的根本图元构成。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游戏地图4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

3、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、DO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-shapesList<MyShape>+DrawShape() +addShape(shape:MyShap e):void+paintComponent(g:Gr

4、aphics):voidMyShape+area():float +perimeter():float +draw(g:Graphics): voidMyCircle-PI:float=3.14f -radius:i nt-x:i nt-y:i nt +MyCircle(x:i nt,y: in t,radius:i nt) +area():float +perimeter():float +draw(g:Graphics) :void+toStri ng():Stri ngMyRecta ngleMyEllipse-width:i nt-Pl:float=3.14f-height:i nt-

5、aL on g:i nt-x:i nt-bShort:i nt-y:i nt-x:i nt-y:i nt+MyRecta ngle(widt+MyEllipse(aL on g:i nh:i nt,height:i nt,x:i nt,t,bShort:i nt,x:i nt,y:i nty:i nt)+area():float+area():float+perimeter():float+perimeter():float+draw(g:Graphics):+draw(g:Graphics):vvoidoid+toStri ng():Stri ng+toStri ng():Stri ngMy

6、Tria ngle-xPoi nts:i nt -yPoi nts:i nt -a:i nt -b:i nt -c:i nt -n:i nt +MyTria ngle(xPoin ts:i nt,yPoi nts:i nt, a:i nt,b:i nt,c:i nt, n:i nt )+area():float +perimeter():float +draw(g:Graphics): void+toStri ng():Stri ng2. 源程序代码：package course.strategy.shape; import java.awt.Graphics;import java.util

7、.ArrayList;import java.util.List;import javax.swi ng.JPa nel;/绘制所有图形SuppressWar nin gs("serial") public class DrawShape exte nds JPa nel private List<MyShape> shapes;public DrawShape() shapes=new ArrayList<MyShape>();public void addShape(MyShape shape) / if(shape!=n ull) shapes

8、.add(shape);添加图形public void pain tComp onen graphics g)/for(MyShape ms:shapes)ms.draw(g);System.out.pri ntl n( ms);、 package course.strategy.shape;import java.awt.Graphics;/形状家族依次绘制图形public abstractclassMyShape publicabstractfloatarea();publicabstractfloatperimeter();publicabstractvoiddraw(Graphics

9、g)package course.strategy.shape;import java.awt.Color;import java.awt.Graphics;/圆形public class MyCircle exte nds MyShape private static final float Pl=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(i nt x,i nt y,i nt radius) / super();this.x=x;this.y=y;this.radius = r

10、adius;Overridepublic float area() II/ TODO自动生成的方法存根 return Pl*radius*radius;构造函数求面积Overridepublic float perimeter() II求周长/ TODO自动生成的方法存根return 2*PI*radius;Overridepublic Stri ng toStri ng() 坐标="+ yreturn "MyCircle radius=" + radius + ", x坐标="+ x + ", y+ ""+&qu

11、ot;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public class MyRecta ngle exte nds MyShape priva

12、te int x,y;/定义起点(x,y )坐标private int width,height; /定义矩形的宽和高public MyRecta ngle(i nt x,i nt y,i nt width, int height) super();this.x=x;this.y=y;this.width = width;this.height = height;Overridepublic float area() / TODO自动生成的方法存根retur n width*height;Overridepublic float perimeter() / TODO自动生成的方法存根retur

13、n 2*(width+height);Override+ width周长public Stri ng toStri ng() return "MyRecta ngle x 坐标="+ x + ", y 坐标="+ y + ", 矩形宽=" + ", 矩形高="+ height + ""+" 面积="+area()+" ="+perimeter();Overridepublic void draw(Graphics g) / TODO自动生成的方法存根g.s

14、etColor(Color.gree n);g.fillRect(x, y, width, height);、package course.strategy.shape;import java.awt.Color;import java.awt.Graphics;/椭圆形public class MyEllipse exte nds MyShape private static final float Pl=3.14f;private int x,y;/定义起点(x,y )坐标private int aLo ng,bShort;/定义椭圆的长轴和短轴public MyEllipse( int

15、x, i nt y,i nt aLo ng, i nt bShort) super();this.x = x;this.y = y;this.aL ong = aLong; this.bShort = bShort;Overridepublic float area() / TODO自动生成的方法存根return 1.0f/4*PI*aL on g*bShort;Overridepublic float perimeter() / TODO自动生成的方法存根return PI*bShort+2*(aLo ng-bShort);Overridepublic Stri ng toStri ng()

16、 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, aLo ng, bShort);、packag

17、e course.strategy.shape;import java.awt.Color;import java.awt.Graphics;/三角形public class MyTria ngle exte nds MyShape private int a,b,c, n;private in t xPo in ts;private in t yPo in ts;public MyTria ngle( in t xPo in ts, in t yPo in ts,i nt n ,i nt a,i nt b,i nt c) super();this.xPoi nts = xPoi nts;th

18、is.yPoi nts = yPoi nts;this. n = n;this.a=a; this.b=b; this.c=c;Overridepublic float area() / TODO自动生成的方法存根float p=(a+b+c)/2;return (float)Math.sqrt(p*(p_a)*(p_b)*(p_c);Overridepublic float perimeter() / TODO自动生成的方法存根retur n a+b+c;Overridepublic Stri ng toStri ng() return "MyTria ngle a="

19、+ a + ", b=" + b + ", c=" + c + ""+"面积="+area()+",周长="+perimeter();Overridepublic void draw(Graphics g) / TODO自动生成的方法存根 g.setColor(Color.yellow);g.fillPolygo n(xPoi nts, yPo in ts, n); package course.strategy.shape; import javax.swing.JFrame;/测试绘制所有形

20、状/测试程序public class Test * paramargs*/public static void main(String args) / TOD O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 MyRecta ngle(200,20,120,100);ds.addShape(new MyEllipse(40,200,150,100);int xPoints=300,240,370;int yPo

21、ints=200,280,300;ds.addShape(new MyTria ngle(xPoi nts,yPoi nts,3,9,12,15);frame.getC onten tPa ne().add(ds);frame.setTitle("绘制图形演示);frame.setSize(500,400);EXIT_ON_CLOS Eframe.setVisible( true ); frame.setDefaultCloseOperatio n(J Frame.3. 测试结果图:=已握匸亠：2) "*a 庖年即罚 C:Program Al«和 aw 珂 re7

22、N 册 vaweio? ( 2Oj3-5-13 下牛7:19:4$ )Myfircle rsriiusOj x生标二7叭 y=?0|面积=11304珈H周怅訂7丘用00Myftectangle 趙标立刚 y坐标二込 距邮宜12P, 酬离=100 面积=12060,0,周匸-44(5.0 MyEllipse »(坐标_阳y里畅-2(3叭feft-iaojE1M-11775.001 jK-414.t)Myrriangl a=y, b二 1 打 clS 血帜二S4.0周也"SO:1.UML 图:2.源代码：package course.observer. no tice;/主题i

23、n terfaceSubject publicvoidregisterObserver(Observer observer);publicvoidremoveObserver(Observer observer);publicvoidn otifyAIIObservers();publicpackage course.observer. no tice;import java.util.ArrayList;import java.util.Iterator;import java.util.List;/学校通知public class Notice impleme nts Subject pr

24、ivate List<Observer> observers;private String message;public Notice()observers=new ArrayList<Observer>();Overridepublic void registerObserver(Observer observer) / TODO自动生成的方法存根 if(!observers.c ontain s(observer)observers.add(observer);Overridepublic void removeObserver(Observer observer)

25、 / TODO自动生成的方法存根if(observers.c ontain s(observer) observers.remove(observer);Overridepublic void no tifyAllObservers() / TODO自动生成的方法存根for(Iterator<Observer> it=observers.iterator();it.hasNext();)Observer o=it. next(); o.getNotice(getMessage();public void setMessage(Stri ng str)this.message=str

26、;public String getMessage()retur n message;、package course.observer. no tice;import java.util.ArrayList;import java.util.Iterator;import java.util.List;/学院通知public class Departme ntNotice impleme nts Subject private List<Observer> observers;private String message;public Departme ntNotice()obse

27、rvers=new ArrayList<Observer>();Overridepublic void registerObserver(Observer observer) / TODO自动生成的方法存根observers.add(observer);Overridepublic void removeObserver(Observer observer) / TODO自动生成的方法存根observers.remove(observer);Overridepublic void no tifyAllObservers() / TODO自动生成的方法存根for(Iterator&l

28、t;Observer> it=observers.iterator();it.hasNext();) Observer o=it .n ext();o.getNotice(getMessage();public void setMessage(Stri ng str)this.message=str;public String getMessage()retur n message;package course.observer. no tice;/观察者public in terfaceObserver public void getNotice(String message);、 、

29、 、 、package course.observer. no tice;/具体观察者，教师public class Teacher implements Observer Overridepublic void getNotice(String message) / TOD O自动生成的方法存根System. out.println(教师收到通知："+message); package course.observer. no tice;/具体观察者，学生public class Studentimplements Observer Overridepublic void getNo

30、tice(String message) / TOD O自动生成的方法存根System. out.println(学生收到通知："+message); package course.observer. no tice;/具体观察者，行政人员public class Administratorimplements Observer Overridepublic void getNotice(String message) / TOD O自动生成的方法存根System. out.println(行政人员收到通知： "+message);、 、 、 、package course

31、.observer. no tice;/测试程序public class Test /*paramargs*/public static void main(String args) II TOD O自动生成的方法存根Notice no tice=new Notice。；Departme ntNotice depart=new Departme ntNotice();Observer tea,stu,adm in;tea= new Teacher();stu= new Stude nt();adm in=new Admi nistrator();no tice.registerObserver

32、(tea);no tice.registerObserver(stu);no tice.registerObserver(adm in);depart.registerObserver(tea);depart.registerObserver(stu);notice.setMessage("学校通知：五一全体放假七天。");depart.setMessage("学院通知：这个礼拜周末补课，请各位做好心里准备。");no tice .no tifyAllObservers();System.out .pri ntln();depart. no tifyAI

33、IObservers();System.out .pri ntln();no tice.removeObserver(tea);no tice .no tifyAllObservers();3.测试结果图：Test C 3 应用程痔匚Aprograrn FilesJavareAbinava( 2021-5-1：教师呱到通知:融通臥 五一全体放腹七可。T。学生收到通知：学梭通炖：五一全体放假七天行政人员收到通知匚学檢通知；五一全体放假七天教师收到通知：学院通知：这个礼拜周末补课请各位俶好心里准备 学生收到通知：学院通知：这个礼拜周末补裸F请各位做好心里淮瞥学生收到通知；学校通村：五一全怵放傩七天

34、行政人员收到通知匕学校通知：五一全体敖假七夭1. UML 图2. 源代码package course posite.gameMap;import java.awt.Dime nsion;import java.awt.Graphics;import javax.swi ng.JPa nel;SuppressWar nin gs("serial")public abstract class GameComp onent exte nds JPa nel public abstract void pain tComp onen t(Graphics g); public Dim

35、e nsi on getPreferredSize() retur n new Dime nsion(50,50);、package course posite.gameMap;import java.awt.Graphics;import java.awt.Image;import javax.swi ng.BorderFactory;import javax.sw ing.lm ageIc on;SuppressWar nin gs("serial")public class Grass exte nds GameComp onent private ImageIc o

36、n icon;private Image image;public Grass()setBorder(BorderFactory.createEmptyBorder(); icon=new ImageIc on ("src/images/grass.jpg"); image=ic on. getlmage();Overridepublic void pain tComp onen t(Graphics g) / TODO自动生成的方法存根 g.drawlmage(image,O,O,getWidth(),getHeight(),this); package course p

37、osite.gameMap; import java.awt.Graphics;import java.awt.Image;import javax.sw ing.lm ageIc on;SuppressWar nin gs("serial") public class House exte nds GameComp onent private ImageIc on icon; private Image image;public House()icon=new ImageIc on ("src/images/house.jpg"); image=ic

38、on. getImage();Overridepublic void pain tComp onen t(Graphics g) / TODO自动生成的方法存根g.drawlmage(image,O,O,getWidth(),getHeight(),this); 、package course posite.gameMap;import java.awt.Graphics;import java.awt.Image;import javax.swing.lmageIcon;SuppressWar nin gs( "serial" )public class Tree ext

39、ends GameComponent private ImageIcon icon ;private Image image;public Tree()icon =new Imagelcon( "src/images/tree.jpg" ); image=icon .getlmage();Overridepublic void paintComponent(Graphics g) / TOD O自动生成的方法存根g.drawImage( image,O,O,getWidth(),getHeight(),this ); package course posite.gameMa

40、p;import java.awt.Graphics;import java.awt.Image;import java.io.File;import javax.imagei o.Im ageIO;import javax.sw ing.lm ageIc on;SuppressWar nin gs("serial")public class Wall exte nds GameComp onentprivate ImageIc on icon;private Image image;public Wall()icon=new ImageIco n( "src/i

41、mages/wall.jpg"); image=ic on. getImage();Overridepublic void pain tComp onen t(Graphics g) / TODO自动生成的方法存根tryimage=ImageIO.read( new File("src/images/wall.jpg"); g.drawlmage(image,O,O,getWidth(),getHeight(),this);catch(Excepti on e)e.pri ntStackTrace(); package course posite.gameMap;

42、import java.awt.Graphics;import java.awt.Image;import javax.sw ing.lm ageIc on;SuppressWar nin gs("serial") public class Road exte nds GameComp onent private Imagelc on icon;private Image image;public Road()icon=new ImageIc on ("src/images/road.jpg"); image=ic on. getImage();Over

43、ridepublic void pain tComp onen t(Graphics g) / TODO自动生成的方法存根g.drawlmage(image,O,O,getWidth(),getHeight(),this); 、package course posite.gameMap;import java.awt.Color;import java.awt.C ontainer;import java.awt.GridLayout;import javax.swi ng.JFrame;/测试程序SuppressWar nin gs("serial")public cla

44、ss Test exte nds JFrame private GridLayout layout;private in t map=1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,130,0,2,0,0,0,0,0,2,0,0,3,1,130,0,0,1,1,3,1,1,0,0,0,3,1,1,0,0,4,0,0,0,0,0,0,0,4,0,0,1,1,0,1,0,1,1,1,0,1,1,1,0,1,0,1,1,0,1,0,030,0,0,3,0,0,1,0,1,1,0,1,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,0,0,0,0,0,0,0,0,1,0,1

45、,1,0,0,4,0,0,1,3,1,0,0,4,0,0,1,1,0,0,0,1,1,1,3,1,1,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,1,0,0,3,3,3,0,0,1,0,0,1,1,0,1,0,0,0,0,0,0,0,0,0,1,0,1,1,2,0,0,0,4,3,4,3,4,0,0,0,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1;public Test()super("游戏地图演示");Container contain er=getC onten tPa ne();layout =n

46、ew GridLayout(15,15);/设置15行*15列的网格布局设置窗口背景颜色contain er.setLayout(layout); Color c=new Color(60,90,0);contain er.setBackgro un d(c);/for(i nt i=0;i<layout.getRows();i+)for(i nt j=0;j<layout.getColu mn s();j+) switch(mapij)case 0:c ontain er.add( new Road();break; case 1:c ontain er.add( new Wal

47、l();break;case 2:c ontain er.add( new House();break; case 3:c ontain er.add( new Grass();break; case 4:c ontain er.add( new Tree();break;setSize(600,600); setVisible(true);/* param args*/public static void main( Stri ng args) / TODO自动生成的方法存根Test t=new Test();t.setDefaultCloseOperati on (JFrame.EXIT_

48、ON_CLOSE); 3. 测试结果图s- lcML 函View+addView(v:View)void +removeView(v:View) void+update(data:int):void7TiIModel+setData(index:int,value:in t):void+getData():int +addObserver(o:View):voi d+removeObserver(o:View):void+notifyObservers():void2.源代码package course.MVC;public in terfaceModel public void setDat

49、a( int index, int value);public int getData();public void addObserver(View o);public void removeObserver(View o);public void notifyObservers(); package course.MVC;import java.util.ArrayList;import java.util.Iterator;import java.util.List;/数据模型public class DataModel impleme nts Model private int data

50、; /一维数组private List<View> observers; /观察者public DataModel()observers=new ArrayList<View>();data=new in t9;for(i nt i=0;i<dataen gth;i+)datai=5;Overridepublic void setData(i nt in dex, int value) / TODO自动生成的方法存根this.datai ndex=value;no tifyObservers();Overridepublic void addObserver(Vi

51、ew o) / TODO自动生成的方法存根if (o = n ull)throw new NullPoi nterExceptio n(); if (!observers.c ontain s(o)observers.add(o);Overridepublic void removeObserver(View o) / TODO自动生成的方法存根if(observers.c ontain s(o) observers.remove(o);Overridepublic void no tifyObservers() / TODO自动生成的方法存根for(lterator<View>

52、it=observers.iterator();it.hasNext();) View observer=it .n ext();observer.update(this.data);Overridepublic in t getData() / TODO自动生成的方法存根return data;、package course.MVC;/添加视图/删除视图public in terfaceView public abstractvoid addView(View v);public abstractvoid removeView(View v);/更新视图public abstract voi

53、d update( int data);package course.MVC;import java.awt.Color;import java.awt.Graphics;import javax.swi ng.JPa nel;/表格图SuppressWar nin gs("serial")public class TableView exte nds JPa nel impleme nts View private in t data=60,50,90,90,40,30,10,20,70;private static final int startX=20;private static final int startY=20;public void pain tComp onen t(Graphics g)super.pa in tComp onen t(g);for(i nt i=0;i