Calculate Centigrade To Fahrenheit Using Java

// centigrade to fahrenhit

import java.io.*;

class ssvcf
 {
   public static void main(String arg[]) throws IOException
   {
    String s1,s2;

    double t1,t2;

    DataInputStream dr = new DataInputStream(System.in);

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

    s1 = dr.readLine();

    t1 = Double.parseDouble(s1);

    t2 = (1.8 * t1 +32);

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