/*
*Cameron Houck
*clhouck/a444t872
*A program for array math
*2 Hour
*? Hours
 */

package Program4;
import java.util.Scanner;
import java.lang.Integer;
import java.lang.Character;

/**
 *
 * @author Chibi
 */
public class Program4 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args)
    {
        /**
     * Intializing Everything.
     */
       char[] array1;
       array1 = new char[20];
       int arraylength1 = 20;
       char[] array2;
       array2 = new char[20];
       int arraylength2 = 20;
       String string1 = "123456789";
       array1 = string1.toCharArray();
       String string2 = "123456789";
       array2 = string2.toCharArray();
       int[] arraysum;
       arraysum = new int[20];
       int counter = 0;
       array1 = reverse(array1, arraylength1);

      System.out.println(array1);

    }
       public static char[] reverse(char[] array,int arraylength)
    {
        int left = 0;
        int right = arraylength - 1;

        while(left < right)
        {
            char temp = array[left];

           /* array[left] = array[right];
            array[right] = temp;*/
            left++;
            right--;
        }

        return array;
    }
}



run:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 9
        at Program4.Program4.reverse(Program4.java:53)
        at Program4.Program4.main(Program4.java:41)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)