rectangle.java

矩形类的说明,包含所有的属性

package lab3.problem2;

public class Rectangle extends Shape {
    double a,b;
	public Rectangle(double width, double height) {
		a= width;
		b= height;
	}

	public double getArea() {
		double s= a*b;
		return s;
	}

	public double getPerimeter() {
		double c= 2*(a+b);
		return c;
	}
	
}