Check the given string is palindrome or not

Check the given string is palindrome or not:

If we reverse a string that reverse string and original string both are equal then that string is palindrome.

Example:

Original string: java

Reverse string: avaj

Both are not equal so not palindrome.

Original string: madam

Reverse string: madam

Both are equal so palindrome.

length():- length() is final method, it is applicable for String Objects. length() method returns number of characters present in the String.

chatAt() method:-

Returns the char value at the specified index. An index ranges from 0 to length()-1. The first char value of the sequence is at index 0, the next at index 1, and so on, as for array indexing.

import java.util.Scanner;

public class PalindromeTest {

    public static void main(String[] arg){

        String name,rev="";

        Scanner sc=new Scanner(System.in);

        System.out.println("Enter Name :");

        name=sc.nextLine();        

        System.out.println("length of the String : "+name.length());

        int i=name.length();//i=string length

        for(int j=i-1;j>=0;j--){

           rev=rev+name.charAt(j);

        }

        System.out.println("reverse string is : "+rev);     

    }

}

/*

Output:-

Enter Name :

java

length of the String : 4

reverse string is : avaj

*/

import java.util.Scanner;

public class PalindromeTest {

    public static void main(String[] arg){

        String name,rev="";

        Scanner sc=new Scanner(System.in);

        System.out.println("Enter Name :");

        name=sc.nextLine();        

        System.out.println("length of the String : "+name.length());

        int i=name.length();//i=string length

        for(int j=i-1;j>=0;j--){

           rev=rev+name.charAt(j);

        }

        System.out.println("reverse string is : "+rev);

        if(name.equals(rev)){

            /* check given string and reverse string are equal or not*/

          System.out.println("palindrome ");  

        }

        else{

            System.out.println("not palindrome ");  

        }

    }

}

/*

Output-1:-

Enter Name :

java

length of the String : 4

reverse string is : avaj

not palindrome 

Output-2:-

Enter Name :

madam

length of the String : 5

reverse string is : madam

palindrome

*/