Hackerrank Java String Reverse Solution

A palindrome is a word, phrase, number, or other sequence of characters which reads the same backward or forward.(Wikipedia)

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Given a string , print Yes if it is a palindrome, print No otherwise.

Constraints

• will consist at most  lower case english letters.

Sample Input

madam

Sample Output

Yes

Solution in java8

Approach 1.

import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        
        Scanner sc=new Scanner(System.in);
        String A=sc.next();
        
        
        if(A.equalsIgnoreCase(new StringBuffer(A).reverse().toString()))
            System.out.println("Yes");
        else
            System.out.println("No");
        
    }
}

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Approach 2.

import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        
        Scanner sc=new Scanner(System.in);
        String A=sc.next();
        /* Enter your code here. Print output to STDOUT. */
        String rev = "";
        for(int i=A.length()-1;i>=0;i--)
            rev+=A.charAt(i);
        if(rev.equals(A))
            System.out.println("Yes");
        else
                    System.out.println("No");

    }
}

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