public class Room {
    //length of room object
    private double length;
    //width of room object
    private double width;

    public Room (double length, double width) {
        //this objects length data member gets
        //the value in the length param
        setLength(length);
        //this objects width data member gets
        //the value in the width param
        setWidth(width);
    }
    public Room (){}

    public void setLength (double length) {
        if (length > 0) {
            this.length = length;
        }
    }
    public double getLength() { return length; }
    public void setWidth(double width) {
        if (width > 0) {
            this.width = width;
        }
    }
    public double getWidth() { return width; }
    public double calcArea() {
        //return area as length * width
        return length * width;
    }
    public void displayRoom() {
        System.out.printf("%.1f x %.1f%n", length, width);
    }
}