charfiltertest.java

来自「java网络编程技术内幕程序代码」· Java 代码 · 共 30 行

/*
 * 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 CharFilterTest {
  public static void main (String[] args) throws IOException {
    FileReader fileReader = new FileReader (FileDescriptor.in);
    FileWriter fileWriter = new FileWriter (FileDescriptor.out);
    LineNumberReader lineNumberReader = new LineNumberReader (fileReader);
    BufferedWriter bufferedWriter = new BufferedWriter (fileWriter, 256);
    String line;
    while ((line = lineNumberReader.readLine ()) != null) {
      String response = lineNumberReader.getLineNumber () + " : " +
        line.toUpperCase ();
      bufferedWriter.write (response);
      bufferedWriter.newLine ();
    }
    bufferedWriter.flush ();
  }
}