filtertest.java

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/*
 * Java Network Programming, Second Edition
 * Merlin Hughes, Michael Shoffner, Derek Hamner
 * Manning Publications Company; ISBN 188477749X
 *
 * http://nitric.com/jnp/
 *
 * Copyright (c) 1997-1999 Merlin Hughes, Michael Shoffner, Derek Hamner;
 * all rights reserved; see license.txt for details.
 */

import java.io.*;

public class FilterTest {
  public static void main (String[] args) {
    BufferedInputStream bufferedIn = new BufferedInputStream (System.in);
    BufferedOutputStream bufferedOut = new BufferedOutputStream (System.out);
    LineNumberInputStream lineNumberIn =
      new LineNumberInputStream (bufferedIn);
    DataInputStream dataIn = new DataInputStream (lineNumberIn);
    DataOutputStream dataOut = new DataOutputStream (bufferedOut);
    try {
      String line;
      while ((line = dataIn.readLine ()) != null) {
        String response = lineNumberIn.getLineNumber () + " : " +
          line.toUpperCase () + "\n";
        dataOut.writeBytes (response);
      }
      dataOut.flush ();
    } catch (IOException ex) {
      System.err.println (ex);
    }
  }
}