Box Class

Here is a class Box that represents a cardboard box.

public class Box implements Comparable<Box> 
{
  private double length, height, depth;
  
  public Box( double length, double height, double depth )
  {
    this.length = length;
    this.height = height;
    this.depth  = depth;
  }
  
  public double volume()
  {
    return length*height*depth;
  }

  // compare this Box to another Box  
  public int compareTo( Box other )
  {
  
  
  }
  
  public String toString()
  {
    return( "length: " + length + ",  height: " + height + ",  depth: " + depth + ",  volume: " + volume() );
  }
  
}

The compareTo() method needs to be finished. To implement the Comparable interface it should look like this:

public int compareTo( Object other )                        

Compare the Box that is running the method with other. Return a negative integer, zero, or a positive integer, when the Box is less than, equal, or greater than other.

The Comparable interface requires that the parameter be of type Object, that is, reference to an object.