import java.util.Arrays;
import java.util.Scanner;
import javax.swing.JOptionPane;

/**
 *
 * @author Bill Kraynek
 *
 * COP3337 Example
 */
public class ArrayExampleWithIncreasedCapUsingMethods {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        int[] nums = new int[5];
        while (true) {
            nums = getInputFromUser(nums);
            if ( nums == null ) break;
            int sum = 0;
            String out = "";
            for (int i = 0; i < nums.length; i++) {
                out += nums[i] + " ";
                sum += nums[i];
            }// end for
            JOptionPane.showMessageDialog(null, "The " + nums.length + " numbers entered are: " + out);
            JOptionPane.showMessageDialog(null, "Their sum is " + sum);
            JOptionPane.showMessageDialog(null, "Their average is " + (float) sum / (float) nums.length);
            // Insert the number 37 at the beginning of the array
            nums = increaseCapacityByOne(nums);
            for (int i = nums.length - 2; i > -1; i--) {
                nums[i + 1] = nums[i];
            }// end for
            nums[0] = 37;
            // Arrays is a class with methods that work on arrays
            // Arrays has a toString method so a loop is not necessary
            out = Arrays.toString(nums);
            JOptionPane.showMessageDialog(null, "The numbers after 37 was added " + out);
            // Arrays also has a sort method
            Arrays.sort(nums);
            out = Arrays.toString(nums);
            JOptionPane.showMessageDialog(null, "The " + nums.length + " numbers sorted are: " + out);
        } // end while
    }// end main

    static int[] getInputFromUser(int[] array) {
        String input = JOptionPane.showInputDialog("Enter numbers separated by spaces\nClick Cancel to quit", "34 77 22 6 8 56 7 33 9 10");
        if (input == null) {
            return null;
        } // end if
        Scanner scanner = new Scanner(input);
        int total = 0;
        while (scanner.hasNext()) {
            int aNumber = scanner.nextInt();
            if (total == array.length) {
                array = increaseCapacity(array);
            } // end if
            array[total] = aNumber;
            total++;
        } // end while
        int[] save = array;
        array = new int[total];
        for (int i = 0; i < total; i++) {
            array[i] = save[i];
        }// end for
        return array;
    }

    static int[] increaseCapacity(int[] array) {
        int[] save = array;
        array = new int[2 * array.length + 1];
        for (int i = 0; i < save.length; i++) {
            array[i] = save[i];
        }
        return array;
    }

    static int[] increaseCapacityByOne(int[] array) {
        int[] save = array;
        array = new int[array.length + 1];
        for (int i = 0; i < save.length; i++) {
            array[i] = save[i];
        }
        return array;
    }
}