import java.io.*;

/**
  *  the purpose of this program is to read data from the keyboard and put it
  *  into a sequential file for processing by ReadFile
  *  @author  Ron Zucker;  modified slightly by Bob Roggio
  */


public class WriteFile
{

  /**
    *  this is the main program which will read from the keyboard and display
    *  the given input onto the screen and also write the data to a file
    *  @param Array of Strings (not used in this program)
    */

  public static void main(String[] args) throws IOException
  {
    String outString;
    DataOutputStream output=null;


    // this code assigns the standard input to a datastream
    BufferedReader input= new BufferedReader(new InputStreamReader(System.in));

    // this code opens the output file...
    try
    {
      output= new DataOutputStream(new FileOutputStream("javaapp.dat"));
    } // end try()

    // handle any open errors
    catch (IOException e)
    {
      System.err.println("Error in opening output file\n"
         + e.toString());
      System.exit(1);
    }  // end catch()

    // priming read......
    outString=getData(input);

    // this is the loop to continue while nnonblank data is entered
    while (!outString.equals(""))
    {
      System.out.println("value entered was:"+ outString);
      output.writeBytes(outString+"\r\n");
      outString=getData(input);
    } // end while()


    // flush buffers and close file...
    try
    {
      output.flush();
      output.close();
    } // end try()
    catch (IOException e)
    {
      System.err.println("Error in closing output file\n"
        + e.toString());
    } // end catch()

    System.out.println("all done");
  } // end main()




  /**
    *  this function will prompt and receive data from the keyboard
    *  @return String containing the data read from the keyboard
    *  @param  BufferedReader that is connected to System.in (the keyboard)
    */
  public static String getData(BufferedReader infile) throws IOException
  {
    System.out.println("enter a value");
    return infile.readLine();
  } // end getData()
  

} // end class WriteFile