JAVA题矩形

 1 package com.lo;
 2 
 3 public class juxing {
 4     
 5     private double chang;
 6     
 7     private double kuan;
 8     
 9     public double getChang()
10     {
11         return chang;
12     }
13     public double getkuan()
14     {
15         return kuan;
16     }
17     public void setChang(double chang)
18     {
19         if (chang >0)
20         {
21         this.chang = chang;
22         }
23         else
24         {
25             System.out.println("长度值 " + chang + "无效");
26         }
27         }
28     public void setKuan(double kuan)
29     {
30         if(kuan<=0)
31         {
32             System.out.println("宽度值 "+ kuan + "无效");
33         }
34         else
35         {
36             this.kuan = kuan;
37         }
38     }
39     public juxing()
40     {
41         
42     }
43     public juxing(double chang,double kuan)
44     {
45         setChang(chang);
46         setKuan(kuan);
47     }
48     public double getMianji()
49     {
50         return this.chang * this.kuan;
51     }
52     public static void main(String[]args)
53     {
54         juxing myJX = new juxing(2,7);
55         
56         myJX.chang = 12;
57         
58         System.out.println("矩形的面积 = "+myJX.getMianji());
59     }
60 }

package com.lo;

public class text1 {

public static void main(String[] args) {

juxing myJX1 = new juxing(20,6);

System.out.println("长 = "+myJX1.getChang());

System.out.println("宽 = "+myJX1.getkuan());

System.out.println("矩形面积 ="+myJX1.getMianji());

myJX1.setChang(30);

myJX1.setKuan(15);

System.out.println("矩形面积 ="+myJX1.getMianji());
}
}

JAVA题 矩形

JAVA题矩形