Reverse An Array - 3 Methods

Method 1 - Revere with For Loop and print

public class ReverseArray { public static void main(String[] args) { // Array with some element int[] myArray = {10,22,33,11,88,9,2}; // reverse loop and printing for(int i = myArray.length-1;i>=0;i--) { System.out.print(myArray[i]+ " "); } } }

Method 2 - Using Array List

// Method 2 Reverse an array using array list public class ReverseArray { public static void main(String[] args) { // Array List ArrayList<Integer> myArray = new ArrayList<Integer>(); myArray.add(10); myArray.add(21); myArray.add(13); myArray.add(14); myArray.add(51); // reverse array and method Collections.reverse(myArray); System.out.println(myArray); } }

Method 3 - Two Pointers and Swap

// Method 3 Reverse with swap public class ReverseArray { public static void main(String[] args) { // Array with some element int[] myArray = {10,22,33,11,88,9,2}; int start = 0; int end = myArray.length-1; int temp = 0; // looping and swapping while(end>start) { temp = myArray[start]; myArray[start] = myArray[end]; myArray[end] = temp; end--; start++; } for(int i:myArray) { System.out.print(i+" "); } } }