1: /** 2: Class with static methods to perform calculations on circles. 3: */ 4: public class CircleCalculator 5: { 6: public static double getArea(double radius) 7: { 8: return Math.PI * radius * radius; 9: } 10: 11: public static double getCircumference(double radius) 12: { 13: return Math.PI * (radius + radius); 14: } 15: }