Java program to check whether string is palindrome or not
In earlier post we have discussed how to check whether a number is palindrome or not.In today’s post we shall check whether a string is palindrome or not.For this we shall use built in functions to reverse a string and then compare the reversal of string to given string.
Procedure:1. Take input from the user and store it in a variable.
2.Here we are going to call a function “reveresing” to find the reverse of the string.
3.At last we shall call the display function to show whether it is a palindrome or not.
2.Here we are going to call a function “reveresing” to find the reverse of the string.
3.At last we shall call the display function to show whether it is a palindrome or not.
Now we shall write a program and get a detailed explanation after this.
Explanation:1. In the “reversing method” we are calculating the length of the given string.Then we are adding each letter of the given string to “reverse_str” variable.Each letter of the given string is obtained using “variable.charAt()” method.
For Ex: If the given string is “hello” then by using str.charAt(2) we get l as the output.Because of indexing of the string begins from 0.
3.Therefore a reverse of the given string is obtained.
4. Now we shall compare this reverse string with given string and display accurate message.
For Ex: If the given string is “hello” then by using str.charAt(2) we get l as the output.Because of indexing of the string begins from 0.
3.Therefore a reverse of the given string is obtained.
4. Now we shall compare this reverse string with given string and display accurate message.
Java program to check palindrome
Java palindrome program: Java program to check if a string is a palindrome or not. Remember a string is a palindrome if it remains unchanged when reversed, for example “dad” is a palindrome as reverse of “dad” is “dad” whereas “program” is not a palindrome. Some other palindrome strings are “mom”, “madam”, “abcba”.