filereader.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 90 行

/*
 * @(#)FileReader.java	1.17 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.  
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER  
 *   
 * This program is free software; you can redistribute it and/or  
 * modify it under the terms of the GNU General Public License version  
 * 2 only, as published by the Free Software Foundation.   
 *   
 * This program is distributed in the hope that it will be useful, but  
 * WITHOUT ANY WARRANTY; without even the implied warranty of  
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU  
 * General Public License version 2 for more details (a copy is  
 * included at /legal/license.txt).   
 *   
 * You should have received a copy of the GNU General Public License  
 * version 2 along with this work; if not, write to the Free Software  
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  
 * 02110-1301 USA   
 *   
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa  
 * Clara, CA 95054 or visit www.sun.com if you need additional  
 * information or have any questions. 
 *
 */

package java.io;


/**
 * Convenience class for reading character files.  The constructors of this
 * class assume that the default character encoding and the default byte-buffer
 * size are appropriate.  To specify these values yourself, construct an
 * InputStreamReader on a FileInputStream.
 *
 * <p><code>FileReader</code> is meant for reading streams of characters.
 * For reading streams of raw bytes, consider using a
 * <code>FileInputStream</code>.
 *
 * @see InputStreamReader
 * @see FileInputStream
 *
 * @version 	1.10, 00/02/02
 * @author	Mark Reinhold
 * @since	JDK1.1
 */
public class FileReader extends InputStreamReader {

   /**
    * Creates a new <tt>FileReader</tt>, given the name of the
    * file to read from.
    *
    * @param fileName the name of the file to read from
    * @exception  FileNotFoundException  if the named file does not exist,
    *                   is a directory rather than a regular file,
    *                   or for some other reason cannot be opened for
    *                   reading.
    */
    public FileReader(String fileName) throws FileNotFoundException {
	super(new FileInputStream(fileName));
    }

   /**
    * Creates a new <tt>FileReader</tt>, given the <tt>File</tt> 
    * to read from.
    *
    * @param file the <tt>File</tt> to read from
    * @exception  FileNotFoundException  if the file does not exist,
    *                   is a directory rather than a regular file,
    *                   or for some other reason cannot be opened for
    *                   reading.
    */
    public FileReader(File file) throws FileNotFoundException {
	super(new FileInputStream(file));
    }

   /**
    * Creates a new <tt>FileReader</tt>, given the 
    * <tt>FileDescriptor</tt> to read from.
    *
    * @param fd the FileDescriptor to read from
    */
    public FileReader(FileDescriptor fd) {
	super(new FileInputStream(fd));
    }

}