smple prgram to read from console in java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.DecimalFormat;
import java.text.ParseException;

public class ReadDoubleFromConsole {
 public static void main(String[] args) {
   System.out.println("Enter a number.");
   double numberFromConsole;
   try {
     InputStreamReader isr = new InputStreamReader(System.in);
     BufferedReader br = new BufferedReader(isr);
     String s = br.readLine();
     DecimalFormat df = new DecimalFormat();
     Number n = df.parse(s);
     numberFromConsole = n.doubleValue();
   } catch (IOException e) {
     numberFromConsole = 0;
   } catch (ParseException e) {
     numberFromConsole = 0;
   }
   System.out.println(numberFromConsole );
 }
}