Calculate The Serious Program Using Java

// serious program
import java.io.*;
import java.text.*;
import java.lang.Math;

class ssva8
{
    public static void main(String arg[]) throws IOException
    {

        double i=1.0,j=0.1;
        BufferedReader obj=new BufferedReader(new InputStreamReader(System.in));
        System.out.print("\nENTER THE VALUE N>1.0 : ");
        double n=Double.parseDouble(obj.readLine());
        System.out.print("\nENTER THE VALUE M>0.1 : ");
        double m=Double.parseDouble(obj.readLine());
        System.out.println("\n");
        NumberFormat nf= NumberFormat.getInstance();
        for(i=0.0;i<=n;i=i+1.0)
        {
            for(j=0.0;j<=m;j=j+0.1)
            {
                System.out.print(nf.format(Math.sqrt(i+j))+ "  ");
            }
            System.out.println("\n");
        }
    }
}