JAVA类和对象练习

设计一个矩形类Rectangle，包含私有的数据成员宽度(Width)和高度(Height)；公有的方法double getArea()返回矩形的面积，公有的方法double getPerimeter()返回矩形的周长。

例如:

测试	Result
Rectangle rect=new Rectangle(8,5); System.out.printf("The Area is %.2f,Perimeter is %.2f\n", rect.getArea(),rect.getPerimeter());	The Area is 40.00,Perimeter is 26.00

class Rectangle{
    private double Width;
    private double Height;

    public Rectangle(double width, double height) {
        Width = width;
        Height = height;
    }
    public double getArea() {
        return Width * Height;
    }
    public double getPerimeter(){
        return (Width + Height) * 2;
    }
}
public class Test{
    public static void main(String[] args) {
        Rectangle rect=new Rectangle(8,5);
        System.out.printf("The Area is %.2f,Perimeter is %.2f\n", rect.getArea(),rect.getPerimeter());
    }
}