Java第四次实践作业 

 1 package demo;
 2 
 3 public class dianfeiguanli {
 4  private  int shangyue;
 5  private int benyue;
 6 public dianfeiguanli(int shangyue , int benyue){
 7     this.shangyue = shangyue;
 8     this.benyue = benyue;
 9 }
10 
11 public int getShangyue(){
12     return shangyue;
13 }
14 public int getBenyue(){
15     return benyue ;
16 }
17 public void setShangyue(int shangyue){
18     this.shangyue = shangyue;
19 }
20 public void setBenyue(int benyue){
21     this.benyue = benyue;
22 }
23 public void print(){
24     System.out.println("shangyue"+shangyue+"benyue"+benyue);
25 }
26 }
1 package demo;
2 
3 public class Testdianfeiguanli {
4     public static void main(String[] args) {
5         dianfeiguanli l1 = new dianfeiguanli(1200, 1450);
6     l1.setBenyue(1500);
7     System.out.println("电费："+(l1.getBenyue()-l1.getShangyue())*1.2);
8 }
9 }
 1 package demo;
 2 
 3 public class yuanzhu {
 4   private double r,h;
 5   double PAI = 3.14;
 6   double s;
 7   double v;
 8   public yuanzhu(double r,double h) {
 9       this.r = r;
10       this.h = h;
11   }
12   public void s() {
13       s=r*r*PAI;
14   }
15   public void v() {
16       v=r*r*PAI*h;
17   }
18   public void print() {
19       System.out.println("圆的半径为："+r+",圆的高为："+h+",圆的底面积为："+s+",圆的体积为："+v);
20   }
21 }
 1 package demo;
 2 
 3 public class Testyuanzhu {
 4 
 5     public static void main(String[] args) {
 6         yuanzhu y1 = new yuanzhu(2.00,4.00);
 7         y1.s();
 8         y1.v();
 9         y1.print();
10         yuanzhu y2 = new yuanzhu(4.00,6.00);
11         y2.s();
12         y2.v();
13         y2.print();
14 
15     }
16 
17 }

我只会这么一点点，这两个我也不怎会，那调用不知道怎么调，要多看看书啊，多看看程序。

posted @ 2019-04-28 22:25  拒绝吃土  阅读(212)  评论(0)  编辑  收藏  举报