import java.io.*;

class WriteToFileDouble
 {
     public static void main(String args[])
       {
          WriteToFileDouble wtfd = new WriteToFileDouble();
          wtfd.writeToFileDouble();
       }
     public void writeToFileDouble()
       {
          double[] dob = { 3.99, 124.30, 30.124};
          FileOutputStream fos = null;
          BufferedOutputStream bos = null;
          DataOutputStream dos = null;
          try
            {
               fos = new FileOutputStream("writeToFileDouble.txt");
	 bos = new BufferedOutputStream(fos);
	 dos = new DataOutputStream(bos);
	 for(int i=0; i<dob.length; i++)
               {
                dos.writeDouble(dob[i]);                
               }
	 dos.close();
            }
           catch(Exception e)
            {
               System.out.println(e);
            }          
       }
  }