JAVA，面向对象的类的问题

public class Test {
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        Rectangle haha = new Rectangle();
        haha.setWeight(in.nextDouble());
        haha.setHeight(in.nextDouble());
        haha.getArea();
        haha.getPperimeter();
    }
}

public class Rectangle {
    double weight=1;
    double height=1;
    public double getWeight() {
        return weight;
    }
    public void setWeight(double weight) {
        this.weight = weight;
    }
    public double getHeight() {
        return height;
    }
     public void setHeight(double height) {
        this.height = height;
    }
    public void getArea(){
        System.out.println(getHeight()*getWeight());
    }
    public void getPperimeter(){
        System.out.println((getHeight()+getWeight())*2);
    }
}