Compile and Execute Java Online

import java.util.Scanner;
public class HelloWorld{
    public static void main(String[] args) {
        System.out.println("Input first number : ");
        Scanner in = new Scanner (System.in);
        int n1 = in.nextInt();
        
        System.out.println("Input second number : ");
        int n2 = in.nextInt();
        int sum = n1 + n2;
        System.out.println ("sum =" +n1+n2);
    }
}