1  public class Dimension extends Object {
  2  	
  3  	// Instance variables:
  4  	protected double width, height;
  5  	
  6  	// Constructors:
  7  	public Dimension(double width, double height) {
  8  		setWidth(width); setHeight(height);
  9  	}
 10  	public Dimension(Dimension d) {
 11  		setWidth(d.width); setHeight(d.height);
 12  	}	
 13  	public Dimension() { }	
 14  	
 15  	// Encapsulate the instance variables:
 16  	public void setWidth(double width) {
 17  		this.width = width;
 18  	}
 19  	public void setHeight(double height) {
 20  		this.height = height;
 21  	}
 22  	public void setDimension(double width, double height) {
 23  		setWidth(width); setHeight(height);
 24  	}
 25  	public void setDimension(Dimension d) {
 26  		setWidth(d.width); setHeight(d.height);
 27  	}
 28  	public double getWidth() {
 29  		return width;
 30  	}
 31  	public double getHeight() {
 32  		return height;
 33  	}
 34  	public Dimension getDimension() {
 35  		return new Dimension(width, height);
 36  	}
 37  	
 38  	// Instance methods:
 39  	public String toString() {
 40  		return super.toString();  // to be overridden
 41  	}
 42  	
 43  }