Triangle.java.html

  1  /**
  2     A triangular shape composed of stacked unit squares like this:
  3     []
  4     [][]
  5     [][][]
  6     . . .
  7  */
  8  public class Triangle
  9  {
 10     private int width;
 11  
 12     /**
 13        Constructs a triangular shape.
 14        @param aWidth the width (and height) of the triangle
 15     */
 16     public Triangle(int aWidth)
 17     {
 18        width = aWidth;
 19     }
 20  
 21     /**
 22        Computes the area of the triangle.
 23        @return the area
 24     */
 25     public int getArea()
 26     {
 27        if (width <= 0) { return 0; }
 28        else if (width == 1) { return 1; }
 29        else 
 30        {
 31           Triangle smallerTriangle = new Triangle(width - 1);
 32           int smallerArea = smallerTriangle.getArea();
 33           return smallerArea + width;
 34        }
 35     }
 36  }