How to check for a tech number in java?

Question

Example 3025 = (30 + 25)²=(55)²=3025

Answer 1

My attempt:
import java.io.*;
import java.util.*;
class Tech_Number
{
    public static void main(String args[])
    {
        Scanner in = new Scanner(System.in);
        int n,l,a,b,sum,sq,div;
        String str,str1,str2;
        System.out.println("Enter Number");
        str= in.nextLine();//input number as a string
        l=str.length();//calculating length of string
        n= Integer.parseInt(str);//converting input number as integer
        if(l%2==0)
        {
            div= l/2;
            str1= str.substring(0,div);//storing 1st half as string
            str2= str.substring(div,l);//storing 2nd half as string
            a= Integer.parseInt(str1);//converting 1st half into integer
            b= Integer.parseInt(str2);//converting 2nd half into integer
            sum= a+b; //sum of the two halves
            sq= sum*sum; // square of sum of two halves
            if(n==sq)
            {
                System.out.println("It is a Tech Number : "+n);
            }
            else
          

Answer 2

Your attempt??

Answer 3

You marked your answer as best does that mean you solved it

Answer 4

Yes