1 /*
   2  * Copyright (c) 1998, 2017, 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 /**
  27  * Provides for system input and output through data streams,
  28  * serialization and the file system.
  29  *
  30  * Unless otherwise noted, passing a null argument to a constructor or
  31  * method in any class or interface in this package will cause a
  32  * {@code NullPointerException} to be thrown.
  33  *
  34  * <h2>Object Serialization</h2>
  35  * <p><strong>Warning: Deserialization of untrusted data is inherently dangerous
  36  * and should be avoided. Untrusted data should be carefully validated according to the
  37  * "Serialization and Deserialization" section of the
  38  * {@extLink secure_coding_guidelines_javase Secure Coding Guidelines for Java SE}.
  39  * </strong></p>
  40  * <ul>
  41  *   <li><a href="{@docRoot}/../specs/serialization/index.html">
  42  *       Java Object Serialization Specification </a>
  43  *   <li>{@extLink serialization_filter_guide Serial Filtering} best practices</li>
  44  *   <li>{@extLink serialver_tool_reference The serialver tool}</li>
  45  * </ul>
  46  *
  47  * @since 1.0
  48  */
  49 package java.io;