/** Box.java provides box-related methods.
 */
public class Box {
    // instance variables to "remember" dimensions
    private double myLength, myWidth, myHeight;
    
    // Box constructor
    public Box(double length, double width, double height) {
        myLength = length;
        myWidth = width;
        myHeight = height;
    }

    // volume of a Box (instance method)
    public double volume() { 
        return myLength * myWidth * myHeight; 
    }

    // surface area of a Box (instance method)
    public double surfaceArea() {
        return 0;  // replace this line for lab exercise
    }
    // accessor methods for instance variables
    public double getLength() { return myLength; }
    public double getWidth() { return myWidth; }
    public double getHeight() { return myHeight; }
    // ... other methods omitted ...
}