Given a string str, the task is to find whether the string is a palindrome or not in Java without using library methods.
Input: str = “abba”
Input: str = “geeks”
Approach: Take two pointers i pointing to the start of the string and j pointing to the end of the string. Keep incrementing i and decrementing j while i < j and at every step check whether the characters at these pointers are same or not. If not then the string is not a palindrome else it is.
Below is the implementation of the above approach:
- C Program to Check if a Given String is Palindrome
- Python program to check if a string is palindrome or not
- TCP Client-Server Program to Check if a Given String is Palindrome
- Python program to check if given string is vowel Palindrome
- Java program to check palindrome (using library methods)
- Check if a string is palindrome in C using pointers
- Check if it is possible to create a palindrome string from given N
- Check if a given string is a rotation of a palindrome
- Check if any anagram of a string is palindrome or not
- Check if there exists any sub-sequence in a string which is not palindrome
- Recursive function to check if a string is palindrome
- Given two strings check which string makes a palindrome first
- Program to check if an Array is Palindrome or not
- Program to check if an Array is Palindrome or not using STL in C++
- Program to check the number is Palindrome or not
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to email@example.com. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.