package shiyan4;
public interface Shape {
public abstract void getArea();
public abstract void draw();
}
package shiyan4;
import Shape.*;
class Circle implements Shape
{
private double r;
public void Cricle(double r)//以半径r为参数构造一个圆
{
this.r = r;
}
public double getArea(double r)
{
return r*r*Math.PI;
}
public void draw()
{
System.out.println("I am a circle");
}
@Override
public void getArea() {
// TODO Auto-generated method stub
}
}
class Rectangle implements Shape
{
private double x;
private double y;
public Rectangle(double x,double y)
{
this.x = x;
this.y = y;
}
public double getArea(double x,double y)
{
return x*y;
}
public void draw()
{
System.out.println("I am a rectangle");
}
@Override
public void getArea() {
// TODO Auto-generated method stub
}
}
public class fangfa {
public static void main(String[] args) {
Circle c1 = new Circle();
Rectangle r1 = new Rectangle(2.0,3.0);
System.out.println("圆形的面积是"+c1.getArea(1.0));
c1.draw();
System.out.println("矩形的面积是"+r1.getArea(2.0,3.0));
r1.draw();
}
}
