Language: Java 15

public class Solution {

    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        String A=sc.next();
        sc.close();
        
        String[] str = A.split("");
        int i=0;
        int j=(str.length)-1;
        boolean flag= true;
        while(i<j){
            if (str[i].compareTo(str[j]) !=0){
                flag=false;
                break;
            }
            
                i++;
                j--;  
        }
        if(flag==true){
            System.out.println("Yes");
        }
        else if(flag==false){System.out.println("No");}
    }
}

Using CharAt Method:

public class Solution {

public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    String A=sc.next();
    sc.close();


    int i=0;
    int j=(A.length())-1;
    boolean flag= true;
    while(i<j){
        if (A.charAt(i) != A.charAt(j)){
            flag=false;
            break;
        }

            i++;
            j--;  
    }
    if(flag==true){
        System.out.println("Yes");
    }
    else if(flag==false){System.out.println("No");}
}

}

`

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 reveresed = new StringBuilder(A).reverse().toString();
    if (A.equals(reveresed)) {
        System.out.println("Yes");
    }
    else{
        System.out.println("No");
    }
}

}

** using the two pointer approach

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

public class Solution {

public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    Scanner sc = new Scanner(System.in);
    String str = sc.next();

    boolean check = check_palindrome(str);

    if(check == true){
        System.out.println("Yes");
    }else{
        System.out.println("No");
    }

}

public static boolean check_palindrome(String str){
    int left = 0;
    int right = str.length() - 1;

    while(left < right){
        if(str.charAt(left) != str.charAt(right)){
            return false;
        }
        left++;
        right--;
    }
    return true;
}

}

My code

public static void main(String[] args) { /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */

    Scanner input = new Scanner(System.in);
    String s = input.nextLine();

    String a = "";
    String b = "";
    for(int i=0; i<s.length(); i++){
        a = a+s.charAt(i);  
    }

    for(int j = s.length()-1; j>=0; j--){
        b= b+s.charAt(j);
    }

    if(a.equals(b)){
        System.out.println("Yes");
    }else{
        System.out.println("No");
    }    
}