Calculate The Square Root Program Using Java

// program for finding the square root

import java.io.*;
import java.lang.*;
import java.text.*;

public class ssva08

{
  public static void main(String arg[])
  {
   double a,b,i,j;
   NumberFormat nf=NumberFormat.getInstance();
   nf.setMaximumFractionDigits(2);
   NumberFormat nf1=NumberFormat.getInstance();
   nf1.setMaximumFractionDigits(1);
   System.out.println("\n\t\tFinding Square Root\n");
   for( i=0.0;i<=0.8;i=i+0.1)
   {

     System.out.print("\t" + nf1.format(i));
   }
   System.out.println();
   System.out.println();
   for( i=0.0;i<=8.0;i++)
   {
   System.out.print(i);
   for( j=0.0;j<=0.8;j=j+0.1)
   {
       a=Math.sqrt(i+j);
       System.out.print("\t" + nf.format(a));
   }
   System.out.println();
  }
 }
}