Do you know how to check if a string is palindrome or not? If not, then this blog will surely help you with a solution you are looking for.
Palindromes are strings that are spelt the same way in the reverse order. They're usually difficult to read, but they have a lot of fun and interesting applications. For example, palindromes represent many words in the English language.
In this article, we'll show you how to check if a string palindrome program in java or not using Java code!
Section: Syntax
When a string is reversed, it remains the same, making it a palindrome. For instance, "dad" is a palindrome because its reverse is "dad," however, "programme" is not a palindrome because its reverse is "margorp," which is distinct from "programme."
When a string is reversed, it remains the same, making it a palindrome. For instance, "dad" is a palindrome because its reverse is "dad," however "the programme" is not a palindrome because its reverse is "margorp," which is distinct from "programme."
How to check if it is a palindrome or not?
The Naive Approach:
To check if a string, ‘s’ is a palindrome or not, we can use the following code:
public booleancheckPal(String s) { int length = s.length(); for (int i=0; ilength; ++i) { if (!Character.isLetterOrDigit(s[i++])) return false; } return true; }
Algorithm
The naive approach is to loop through the string and compare each character. If it's not a palindrome, then we're done.
The recursive approach is to keep track of the previous character in each position (1-index) and then check if that position has been passed or not. If so, go back up one more level and repeat this process until you reach the end of your string; otherwise, stop there! This can be done using either an integer array or StringBuffer object with a capacity set high enough so that no characters are left out during iteration; see below:
```Java
int index = 0;for(char chr=''' ;ilen();++i){if(chr == chr[index])return true;}```
IsPalindrome(str):
The method is Palindrome(String str) returns true if the string is a palindrome and false otherwise.
To check whether a given string is a palindrome or not, you can use the following code:
Start traversing from the leftmost character.
To check if a string is palindrome or not, we can use the following algorithm:
Start traversing from the leftmost character.
Traverse through all characters in the string.
Use a loop to traverse through all elements of the string and check if two elements are equal (e.g., 'a' == 'b').
When you find a non-matching element, return false; otherwise, return true when all elements match (i.e., they are equal).
learn more...
Comments