1  public class Square extends Rectangle {
  2  
  3  	// Constructors:
  4  	public Square(double width) {
  5  		super.setWidth(width);
  6  		super.setHeight(width);
  7  	}
  8  	public Square() { }	
  9  	
 10  	// Encapsulate the instance variable:
 11  	public void setWidth(double width) {
 12  		super.setWidth(width);
 13  		super.setHeight(width);
 14  	}
 15  	
 16  }