实验六 Java期中考试.doc

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1、期中考试：二、packageExextra_2;importjava.util.*;publicclassTest{publicstaticvoidmain(String[]args){int[]a=newint[10];Scannerscan=newScanner(System.in);for(inti=0;i<10;i++){a[i]=scan.nextInt();}intmax=a[0];intmin=a[0];for(inti=0;i<10;i++){if(a[i]>max)max=a[i];}for(inti=0;i<

2、10;i++){if(a[i]

3、{returny;}publicvoidsetY(inty){this.y=y;}publicStringtoString(){return"("+x+","+y+")";}publicdoubledistance(Pointp1,Pointp2){intx1=p1.getX();inty1=p1.getY();intx2=p2.getX();inty2=p2.getY();s=Math.sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));returns;}}packageExextra_3;public

4、classTest{publicstaticvoidmain(String[]args){Pointp1=newPoint(4,5);Pointp2=newPoint(2,1);doubles=p2.distance(p1,p2);System.out.println(p1.toString());System.out.println(p2.toString());System.out.println(s);}}四、packageExextra_4;publicinterfaceShape{publicabstractdoubl

5、earea();}packageExextra_4;publicclassMyCircleimplementsShape{privatedoubler;publicMyCircle(doubler){this.r=r;}publicdoublearea(){returnMath.PI*r*r;}publicStringtoString(){return"circle:r="+r+"area="+this.area();}}packageExextra_4;publicclassMyRectangleimplementsShape

6、{privatedoublew,h;publicMyRectangle(doublew,doubleh){this.w=w;this.h=h;}publicdoublearea(){returnw*h;}publicStringtoString(){return"Rectangle:width="+w+""+"height="+h+"area="+this.area();}}packageExextra_4;publicclassTest{publicstaticvoidmain(String[]args){Shapet1=ne

7、wMyRectangle(10,5);System.out.println(t1.toString());Shapet2=newMyCircle(3);System.out.println(t2.toString());}}五、packageExextra_5;importjavax.swing.*;importjava.awt.*;importjava.awt.event.*;publicclassMyFrmextendsJFrameimplementsActionListener{intm=0;JButtonbtn1=new

8、JButton("点我");JButtonbtn2=newJButton("清零");JLabellb=newJLabel("共点击了0次");publicMyFrm(){JPaneljp=(JPanel)this.getContentPane();jp.set