View difference between Paste ID: VNrUX5Bz and u4BZx3PU

     public class Ex15 {
 
     public static void main(String[] args) {
         int[] arr1 = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
         int[] arr2 = new int[arr1.length];
 
         printWithSeperatorUsingForLoop(',', arr1);
         printWithSeperatorUsingWhileLoop('-', arr2);
 
         reverseArrayCopyWithForLoop(arr1, arr2);
         reverseArrayCopyWithWhileLoop(arr1, arr2);
 
         printWithSeperatorUsingDoWhileLoop(',', arr1);
         printWithSeperatorUsingForLoop('-', arr2);
     }
 
     private static void printWithSeperatorUsingForLoop(char seperator, int[] array) {
         for(int i = 0; i < array.length; i++) {
             System.out.print(array[i]);
 
             if(i < array.length - 1) {
                 System.out.print(seperator);
             } else {
                 System.out.println();
             }
         }
     }
 
     private static void printWithSeperatorUsingWhileLoop(char seperator, int[] array) {
         int i = 0;
 
         while(i < array.length) {
             System.out.print(array[i]);
 
             if(i < array.length - 1) {
                 System.out.print(seperator);
             } else {
                 System.out.println();
             }
 
             i++;
         }
     }
 
     private static void printWithSeperatorUsingDoWhileLoop(char seperator, int[] array) {
         int i = 0;
 
         do {
             System.out.print(array[i]);
 
             if(i < array.length - 1) {
                 System.out.print(seperator);
             } else {
                 System.out.println();
             }
 
             i++;
         } while(i < array.length);
     }
 
-        for(int i = source.length - 1; i >= 0; i--) {
+
-            destination[i] = source[i];
+        for(int i = source.length - 1, j = 0; i >= 0; i--, j++) {
             destination[j] = source[i];
         }
     }
 
-        int i = source.length - 1;
+
         int i = source.length - 1, j = 0;
-            destination[i] = source[i];
+
             destination[j] = source[i];
             i--;
-    }
+            j++;
         }
     }
 }