Given a string , you have to predict whether it can be changed into a palindrome or not by changing the positions of the characters Eg. Tests Yes Explanation:tests can be changed to tsest or stets
Why you want to do that, a String or Number is called a Palindrome which meaning remains same in either forward or reverse direction. So you don't need to change the positions of all strings and check them for Palindrome.
For detail tutorial on Palindrome in Java, you may go through the following link