package chapter17;

/**
 * Title:        Chapter 17, "Input and Output"
 * Description:  Examples for Chapter 17
 * Copyright:    Copyright (c) 2000
 * Company:      Armstrong Atlantic State University
 * @author Y. Daniel Liang
 * @version 1.0
 */

// TestPrintWriter.java: Create a text file using PrintWriter
import java.io.*;

public class TestPrintWriter
{
  // Main method: args[0] is the output file
  public static void main(String[] args)
  {
    // Declare print stream
    PrintWriter pw = null;

    // Check usage
    if (args.length != 1)
    {
      System.out.println("Usage: java TestPrintWriters file");
      System.exit(0);
    }

    File tempFile = new File(args[0]);

    if (tempFile.exists())
    {
      System.out.println("The file " + args[0] +
        " already exists, delete it, rerun the program");
      System.exit(0);
    }

    // Write data
    try
    {
      // Create data output stream for tempFile
      pw = new PrintWriter(new FileOutputStream(tempFile), true);
      for (int i=0; i<10; i++)
        pw.print(" "+(int)(Math.random()*1000));
    }
    catch (IOException ex)
    {
      System.out.println(ex.getMessage());
    }
    finally
    {
      // Close files
      if (pw != null) pw.close();
    }
  }
}