Merge String Characters Program in Java

Define a class to accept two strings of same length and form a new word in such a way that, the first character of the first word is followed by the first character of the second word and so on. [10]
Example:
Input string 1-BALL
Input String 2- WORD
OUTPUT: BWAOLRLD

import java.util.Scanner;
public class MergeString
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        String st1,st2;
        String newSt = "";
        System.out.print("Enter a string1:");
        st1 = sc.nextLine();
        
        System.out.print("Enter a string2:");
        st2 = sc.nextLine();
        
        int l = st1.length();
        for (int i = 0; i < l; i++)
        {
            newSt = newSt + st1.charAt(i) + st2.charAt(i);
        }
        
        System.out.println(newSt);
    }
}

Output:

Enter a string1:BALL
Enter a string2:WORD
BWAOLRLD