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