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1   /*
2    * Copyright (c) 1994, 2008, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  
26  package java.io;
27  
28  
29  /**
30   * Signals that an attempt to open the file denoted by a specified pathname
31   * has failed.
32   *
33   * <p> This exception will be thrown by the {@link FileInputStream}, {@link
34   * FileOutputStream}, and {@link RandomAccessFile} constructors when a file
35   * with the specified pathname does not exist.  It will also be thrown by these
36   * constructors if the file does exist but for some reason is inaccessible, for
37   * example when an attempt is made to open a read-only file for writing.
38   *
39   * @author  unascribed
40   * @since   JDK1.0
41   */
42  
43  public class FileNotFoundException extends IOException {
44      private static final long serialVersionUID = -897856973823710492L;
45  
46      /**
47       * Constructs a <code>FileNotFoundException</code> with
48       * <code>null</code> as its error detail message.
49       */
50      public FileNotFoundException() {
51          super();
52      }
53  
54      /**
55       * Constructs a <code>FileNotFoundException</code> with the
56       * specified detail message. The string <code>s</code> can be
57       * retrieved later by the
58       * <code>{@link java.lang.Throwable#getMessage}</code>
59       * method of class <code>java.lang.Throwable</code>.
60       *
61       * @param   s   the detail message.
62       */
63      public FileNotFoundException(String s) {
64          super(s);
65      }
66  
67      /**
68       * Constructs a <code>FileNotFoundException</code> with a detail message
69       * consisting of the given pathname string followed by the given reason
70       * string.  If the <code>reason</code> argument is <code>null</code> then
71       * it will be omitted.  This private constructor is invoked only by native
72       * I/O methods.
73       *
74       * @since 1.2
75       */
76      private FileNotFoundException(String path, String reason) {
77          super(path + ((reason == null)
78                        ? ""
79                        : " (" + reason + ")"));
80      }
81  
82  }