import java.io.*;

/**
  * Demonstrate wrapping streams to send text and primitive
  * type values to a file.
**/
public class PrintWriterFileApp
{
  public static void main (String arg[]) {

    File file = null;

    // Get the file from the argument line.
    if (arg.length > 0) file = new File (arg[0]);
    if (file == null ) {
        System.out.println ("Default: textOutput.txt");
        file = new File ("textOutput.txt");
    }

    // Create a FileWriter stream to a file and then wrap
    // a PrintWriter object around the FileWriter to print
    // primitive values as text to the file.
    try {
        // Create a FileWriter stream to the file
        FileWriter file_writer = new FileWriter (file);

        // Put a buffered wrappter around it
        BufferedWriter buf_writer = new BufferedWriter (file_writer);

        // In turn, wrap the PrintWriter stream around this output stream
        // and turn on the autoflush.
        PrintWriter print_writer = new PrintWriter (buf_writer,true);

        // Use the PrintWriter println methods to send strings and
        // primitives to the file.
        print_writer.println ("Text output with PrintWriter.");
        print_writer.println ("Primitives converted to strings:");

        boolean a_boolean =  false;
        byte    a_byte    =  114;
        short   a_short   =  1211;
        int     an_int    =  1234567;
        long    a_long    =  987654321;
        float   a_float   =  983.6f;
        double  a_double  = -4.297e-15;

        print_writer.println (a_boolean);
        print_writer.println (a_byte);
        print_writer.println (a_short);
        print_writer.println (an_int);
        print_writer.println (a_long);
        print_writer.println (a_float);
        print_writer.println (a_double);

        // PrintWriter doesn't throw IOExceptions but instead
        // offers the catchError() method
        if (print_writer.checkError ()) {
            System.out.println ("An output error occurred!" );
        }

    }
    catch (IOException ioe){
      System.out.println("IO Exception");
    }
  } // main

} // class PrintWriterFileApp