Calculate Fahrenheit To Centigrade Using Java

// fahrenhit  to centigrade

import java.io.*;

class ssvfc
 {
   public static void main(String arg[]) throws IOException
   {
    String s1;

    double t1,t2;

    DataInputStream dr = new DataInputStream(System.in);

    System.out.println("\nEnter the centigrade in temperature : ");

    s1 = dr.readLine();

    t1 = Double.parseDouble(s1);

    t2 = (t1 -32)/1.8;

    System.out.println("\nThe temperature in farenhit is : " +t2);
  }
 }