第四次实训作业

1 package LHB.inherit;
 2 
 3 public class Electricityfees 
 4 {
 5    private int lastmonth,thismonth;/*上月电表读数，本月电表读数*/
 6    public Electricityfees()
 7    {
 8        
 9    }
10    public Electricityfees(int lastmonth,int thismonth)
11    {
12        this.lastmonth=lastmonth;
13        this.thismonth=thismonth;
14    }
15    public int getLastmonth() 
16     {
17     return lastmonth;
18     }
19 
20    public void setLastmonth(int lastmonth) 
21     {
22     this.lastmonth = lastmonth;
23     }
24 
25   public int getThismonth() 
26    {
27     return thismonth;
28    }
29 
30   public void setThismonth(int thismonth) 
31    {
32     this.thismonth = thismonth;
33    }
34    public void print()
35    {
36        System.out.print("上月电表读数为："+lastmonth+"  ");
37        System.out.println("这个月电表读数为："+thismonth+"  ");
38    }
39 }

 1 package LHB.inherit;
 2 
 3 public class TestElectricity 
 4 {
 5 
 6     public static void main(String[] args) 
 7     {    double x;
 8          Electricityfees p=new Electricityfees();
 9          p.setLastmonth(1000);
10          p.setThismonth(1200);
11          x=p.getThismonth()*1.2;
12          System.out.println("本月电费为："+x);
13          Electricityfees q=new Electricityfees(1200,1450);
14          q.setThismonth(1500);
15          x=q.getThismonth()*1.2;
16          System.out.println("本月电费为："+x);
17     }
18     
19 }