(' Lets reverse the list using swap elements ') Public static void main(String args) throws Exception Let us see one example to access an index in the list which is greater than the total number of elements in the list.

As we can see, the string before and after swap operation is the same thus, it is a palindrome.

Here for loop is run upto the middle of the list and swapping ith element with the n-i-1th element in the list.

In the above program, we used the swap method to reverse the list to see if the current and reversed list is the same or not, thus called a palindrome string.

Let us see the example to check if a string is a palindrome or not using the swap() method. Here, since we cannot find an element with index =7, the IndexOutOfBound exception is thrown. Scenario 2: Swap elements at index 2 and 7. Scenario 1: Swap elements at index 3 and 5. Let us consider below list of elements and different scenarios in that:

The list is traversed, and list1, list1 element is taken and swapped.

The size of the list is checked and compared with the indexes given if they lie in the bounds of list size or not in case no, then IndexOutOfBounds run time exception is thrown and exit.

First, the arguments’ indexes are checked if they are not null otherwise, a compile-time error is thrown.

Let us see the working of the swap method using pseudocode:

The swap method is functionality provided to us to swap the elements of a list at 2 different indexes provided in the arguments to while calling the functions. pos2: This variable represents the index of the second element.pos1: This variable represents the index of the first element.list1: Represents the reference variable of type having a number of elements.Public static void swap(List list1, int pos1, int pos2)

Java array swap method