java矩形类的实现.doc

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1、附页：（1）源代码及结果：importjava.io.*;classRectangle{intwidth;intheight;Rectangle(){}Rectangle(intw,inth){width=w;height=h;}publicintgetArea(){returnwidth*height;}publicintgetPerimeter(){returnwidth*2+height*2;}}classsquareextendsRectangle{intwidth;intheight;square(intw,inth){width=w;height=

2、h;}publicintgetPerimeter(){returnwidth*4;}publicintgetArea(){returnwidth*width;}}publicclassUseValue{publicstaticvoidmain(Stringargs[]){intm,n;try{System.out.print("请输入长:");BufferedReaderbr=newBufferedReader(newInputStreamReader(System.in));Stringp=br.readLine();m=Integer.parseInt(p

3、);System.out.print("请输入宽:");BufferedReaderbr1=newBufferedReader(newInputStreamReader(System.in));Stringq=br1.readLine();n=Integer.parseInt(q);if(m==n){squaresquare1=newsquare(m,n);System.out.println("该图形为正方形");System.out.print("其面积为:"+square1.getArea()+";");System.out.print("其周长为:"+

4、square1.getPerimeter()+";");}else{Rectanglerect1=newRectangle(m,n);System.out.print("该图形为矩形");System.out.print("其面积为:"+rect1.getArea()+";");System.out.print("其周长为:"+rect1.getPerimeter()+";");}}catch(IOExceptione){}}}（2）源代码及结果：importjava.io.*;interfacePrintable{publicvoidprintItMyWay

5、();publicvoidprintItMyWay(chara);}classRectangleimplementsPrintable{intwidth;intheight;Rectangle(){}Rectangle(intw,inth){width=w;height=h;}publicintgetArea(){returnwidth*height;}publicintgetPerimeter(){returnwidth*2+height*2;}publicvoidprintItMyWay(){System.out.print("其长为:"+width+";

6、");System.out.print("其宽为:"+height+";");System.out.print("其面积为:"+(width*height)+";");System.out.println("其周长为:"+(width*2+height*2)+";");}publicvoidprintItMyWay(chara){for(inti=1;i<=height;i++){for(intj=1;j<=width;j++){System.out.print(a);}System.out.println("");}}}classsquareextendsR

7、ectangle{intwidth;intheight;square(intw,inth){width=w;height=h;}publicintgetPerimeter(){returnwidth*4;}publicintgetArea(){returnwidth*width;}publicvoidprintItMyWay(){System.out.print("其边长为:"+width+";");System.out.print("其面积为:"+(width*width)+";");System.out.println("其周长为:"+(width*4)+

8、";");}publicvoidpri