package Chapter7;

public class TotalArea {
 /** Main method */
 public static void main(String[] args) {
 // Declare circleArray
 Circle3[] circleArray;

 // Create circleArray
 circleArray = createCircleArray();

 // Print circleArray and total areas of the circles
 printCircleArray(circleArray);
 }

 /** Create an array of Circle objects */
 public static Circle3[] createCircleArray() {
 Circle3[] circleArray = new Circle3[10];

 for (int i = 0; i < circleArray.length; i++) {
 circleArray[i] = new Circle3(Math.random() * 100);
 }

 // Return Circle array
 return circleArray;
 }

 /** Print an array of circles and their total area */
 public static void printCircleArray
 (Circle3[] circleArray) {
 System.out.println("Radius\t\t\t\t" + "Area");
 for (int i = 0; i < circleArray.length; i++) {
 System.out.print(circleArray[i].getRadius() + "\t\t" +
 circleArray[i].getArea() + '\n');
 }

 System.out.println("-----------------------------------------");

 // Compute and display the result
 System.out.println("The total areas of circles is \t" +
 sum(circleArray));
 }

 /** Add circle areas */
 public static double sum(Circle3[] circleArray) {
 // Initialize sum
 double sum = 0;

 // Add areas to sum
 for (int i = 0; i < circleArray.length; i++)
 sum += circleArray[i].getArea();

 return sum;
 }
}