/* 
 * Important! You must import the util and io libraries for this to work!
 */
import java.util.Random;
import java.util.StringTokenizer;
import java.io.*;

/*
 * This example program illustrates how to use a BufferedReader to read
 * line-by-line from an input file, how to use a StringTokenizer to
 * read words from a string, and how to use a FileWriter to write 
 * strings to an output file. It also illustrates the use of exception
 * handling by try-catch to handle the potential I/O errors.
 */
public class TextCopy {
  public static void main(String[] args) {

      if(args[0] == null || args[1] == null) {
	  System.out.println("usage: TextCopy <inputfilename> <outputfilename>");
	  System.exit(0);
      }

    try  // We need try-catch because of potential problems with the files.
      {
      /* 
       * We create a BufferedReader from the filename which is the first
       * first command-line argument.
       */
      BufferedReader inputReader = new BufferedReader(new FileReader(args[0]));

      /* 
       * We create a PrintWriter from the filename which is the second
       * command-line argument.
       */
      PrintWriter outputWriter = new PrintWriter(new FileWriter(args[1]));

     /* The following while loop reads from the file line-by-line.  */
      boolean moreInput = true; 
      String oneLine;
      while (moreInput) 
        {
        oneLine = inputReader.readLine(); // Read a line from the file.
        if (oneLine == null)
 	  {
	  moreInput = false;
	  }
        else
          {
          StringTokenizer wordGetter = new StringTokenizer(oneLine);

	  /* 
	   * The following while loop reads individual words from a string 
	   * and copies them word-by-word to the output file.
	   */
          while (wordGetter.hasMoreTokens())
	    {
            String aWord = wordGetter.nextToken(" \t\n\",.;:?"); 

	    System.out.println(aWord);
//            outputWriter.print(aWord);
//	    outputWriter.print(" ");
	    }
          outputWriter.println(); 
	  }
        } 

      /* Now we close the input and output files. */
      inputReader.close();
      outputWriter.close();
      } 
    catch(IOException anError)
      {
      anError.printStackTrace(); // Show the function call stack for debugging.
      }
    }
  }