Use a two-pointer approach with one pointer at the start and one at the end
Swap the elements at the two pointers
Move the start pointer forward and the end pointer backward
Repeat until the pointers meet or cross
Example:
`int[] arr = {1, 2, 3, 4, 5};`
`for (int i = 0, j = arr.length – 1; i < j; i++, j--) {`
` int temp = arr[i];`
` arr[i] = arr[j];`
` arr[j] = temp;`
`}`
Use `Collections.reverse()` for a `List`
Example:
`List
`Collections.reverse(list);`
Use `Arrays.sort()` only if reversing a sorted order is not required
Use a temporary array if you want to create a reversed copy instead of modifying the original
Example:
`int[] reversed = new int[arr.length];`
`for (int i = 0; i < arr.length; i++) {`
` reversed[i] = arr[arr.length – 1 – i];`
`}`