Root calculation for the given number using Java

// Root Calculation for given numbers
import java.io.*;
import java.text.*;
import java.math.*;

class ssvroot
{
public static void main(String arg[])throws IOException
{
double i,j,x,n;

System.out.print("Enter the float for table limit  :");
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        n=Double.parseDouble(br.readLine());

NumberFormat nf=NumberFormat.getInstance();
nf.setMaximumFractionDigits(2);
System.out.print("No  :");

for(i=0;i<=n;i=i+0.1)
{
    System.out.print("\t"+ nf.format(i) );
}
System.out.println();

for(i=0;i<=9.0;i=i+1.0)
{
    System.out.print("\n" + i);
    for(j=0;j<=n;j=j+0.1)
    {
        x=i+j;
        System.out.print("\t"+ nf.format(Math.sqrt(x)));
    }
}

}
}