Java example source code file (ReadAddedSuperClass2.java)

This example Java source code file (ReadAddedSuperClass2.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

addedsuperclass, classnotfoundexception, file, fileinputstream, ioexception, objectinputstream, readaddedsuperclass2, serializable

The ReadAddedSuperClass2.java Java example source code

/*
 * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code 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 code 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 in the LICENSE file that
 * accompanied this code).
 *
 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @bug 4070080
 *
 * @build WriteAddedSuperClass ReadAddedSuperClass2
 * @run main ReadAddedSuperClass2
 * @summary  2nd part of test deserializes the serialization stream into an
 *           instance of the original class WHEN the AddedSuperClass exists
 *           locally.
 *
 * Description of failure:
 *
 * If you delete AddedSuperClass.class before running this test,
 * both JDK 1.1.x and 1.2 result in ClassNotFoundException for class
 * AddedSuperClass.  If the .class file is not deleted, 1.2 does not
 * fail. However, JDK 1.1.4 core dumps dereferencing a null class handle
 * in the native method for inputClassDescriptor.
 */

import java.io.*;

class AddedSuperClass implements Serializable {
    // Needed at least one field to recreate failure.
    int field;
}

class A implements Serializable {
    // Version 1.0 of class A.
    private static final long serialVersionUID = 1L;
}

public class ReadAddedSuperClass2 {
    public static void main(String args[]) throws IOException, ClassNotFoundException {
        File f = new File("tmp.ser");
        ObjectInput in =
            new ObjectInputStream(new FileInputStream(f));
        A a = (A)in.readObject();
        in.close();
    }
}