package?com.imooc;
public?abstract?class?Shape?{
public?abstract?void?Circum();
public?abstract?void?Area();
}
public?class?Rectangle?extends?Shape?{
float?a,b,area1,circum;
public?void?init(){
a=10f;
b=9f;
}
public?void?Area(){
area1=a*b;
System.out.println("矩形的面積為"+area1);
}
public?void?Circum(){
circum=2*(a+b);
System.out.println("矩形的周長(zhǎng)為"+circum);
}
}
public?class?Circle?extends?Shape?{
public?float?r;
public?double?Arae1,Circum1;
public?void?init(){
r=5f;
}
@Override
public?void?Area()?{
//?TODO?Auto-generated?method?stub
Arae1=3.14*r*r;
System.out.println("圓的面積是"+Arae1);
}
@Override
public?void?Circum()?{
//?TODO?Auto-generated?method?stub
Circum1=3.14*2*r;
System.out.println("圓的周長(zhǎng)是"+Circum1);
}
}
public?class?Initail?{
/**
?*?@param?args
?*/
public?static?void?main(String[]?args)?{
//?TODO?Auto-generated?method?stub
Shape?R1=new?Rectangle();
Shape?C2=new?Circle();
R1.Area();
R1.Circum();
C2.Area();
C2.Circum();
}矩形的面積為0.0矩形的周長(zhǎng)為0.0圓的面積是0.0圓的周長(zhǎng)是0.0
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