package InterfaceDemo;

/**
 * Scale.java
 *
 *
 * Created: Tue Feb 13 19:44:08 2001
 *
 * @author Stuart C. Shapiro
 * The class of scales,
 * objects that can hold weighable objects.
 */

public class Scale {
    /** The number of objects held on this scale. */
    private int numberHeld = 0;
    /** The total weight of ojbects held on this scale. */
    private double totalWeight = 0.0;

    /** Constructs a scale. */
    public Scale (){
	
    }

    /**
     * Adds the object to this scale.
     * @param object The object being added to this scale.
     */
    public void addObject(Weighable object) {
	numberHeld = numberHeld + 1;
	totalWeight = totalWeight + object.getWeight();
    }

    /**
     * Prints the number of objects on the scale,
     * and their total weight.
     */
    public void report(){
	System.out.println("I'm holding " + numberHeld
			   + " object(s), weighing a total of "
			   + totalWeight + " pounds.");
    }
	
}// Scale