1: /** 2: An interface for methods that return 3: the perimeter and area of an object. 5: @author Frank M. Carrano, Timothy M. Henry 6: @version 5.0 7: */ 8: public interface Measurable 9: { 10: /** Gets the perimeter. 11: @return The perimeter. */ 12: public double getPerimeter(); 13: 14: /** Gets the area. 15: @return The area. */ 16: public double getArea(); 17: } // end Measurable