package LHB.inherit;
public class Electricityfees
{
private int lastmonth,thismonth;/*上月电表读数,本月电表读数*/
public Electricityfees()
{
}
public Electricityfees(int lastmonth,int thismonth)
{
this.lastmonth=lastmonth;
this.thismonth=thismonth;
}
public int getLastmonth()
{
return lastmonth;
}
public void setLastmonth(int lastmonth)
{
this.lastmonth = lastmonth;
}
public int getThismonth()
{
return thismonth;
}
public void setThismonth(int thismonth)
{
this.thismonth = thismonth;
}
public void print()
{
System.out.print("上月电表读数为:"+lastmonth+" ");
System.out.println("这个月电表读数为:"+thismonth+" ");
}
}
package LHB.inherit;
public class Cylinder
{
private int r,high; /*半径,高*/
public Cylinder(int r,int high)
{
this.r=r;
this.high=high;
}
public double area()
{
double s;
s=3.14*r*r;
return s;
}
public double volume()
{
double v;
v=area()*high;
return v;
}
public void print()
{
System.out.println("圆的半径是:"+r+" "+"高是:"+high);
System.out.printf("圆的底面积是:%.2f 体积是:%.2f\n",area(),volume());
}
public int getR()
{
return r;
}
public void setR(int r)
{
this.r = r;
}
public int getHigh()
{
return high;
}
public void setHigh(int high)
{
this.high = high;
}
public static void main(String[] args)
{
}
}
package LHB.inherit;
public class Elementary
{
private int num1,num2;
private char Char;
public Elementary(int num1,int num2)
{
this.num1=num1;
this.num2=num2;
}
public Elementary(int num1,int num2,char Char)
{
this.num1=num1;
this.num2=num2;
this.Char=Char;
System.out.print("操作结果是:");
switch(Char)
{
case'+': System.out.println(add());break;
case'-': System.out.println(minus());break;
case'*': System.out.println(multiply());break;
case'/': System.out.println(divide());break;
}
}
public int add()
{
int sum;
sum=num1+num2;
return sum;
}
public int minus()
{
int minu;
minu=num1-num2;
return minu;
}
public int multiply()
{
int mult;
mult=num1*num2;
return mult;
}
public int divide()
{
int divid;
divid=num1/num2;
return divid;
}
public int getNum1()
{
return num1;
}
public void setNum1(int num1)
{
this.num1 = num1;
}
public int getNum2()
{
return num2;
}
public void setNum2(int num2)
{
this.num2 = num2;
}
public char getChar()
{
return Char;
}
public void setChar(char c)
{
Char = c;
}
}