WriteAddedSuperClass.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/* @test
 * @bug 4070080
 *
 * @summary  Test reading an evolved class serialization into the original class
 *           version. Class evolved by adding a superclass.
 *
 * @clean A WriteAddedSuperClass ReadAddedSuperClass ReadAddedSuperClass2
 * @compile WriteAddedSuperClass.java
 * @run main WriteAddedSuperClass
 * @clean A AddedSuperClass
 * @compile ReadAddedSuperClass.java
 * @run main ReadAddedSuperClass
 * @clean A
 * @compile WriteAddedSuperClass.java
 * @run main WriteAddedSuperClass
 * @clean A AddedSuperClass
 * @compile ReadAddedSuperClass2.java
 * @run main ReadAddedSuperClass2
 *
 */

 /*
 *  Part a of test serializes an instance of an evolved class to a serialization stream.
 *  Part b of test deserializes the serialization stream into an instance of
 *  the original class.
 *
 */

import java.io.*;

class AddedSuperClass implements Serializable {
    private static final long serialVersionUID = 1L;

    // Needed at least one field to recreate failure.
    int field;
}

class A extends AddedSuperClass implements Serializable  {
    // Version 1.1 of class A.  Added superclass NewSerializableSuper.
    private static final long serialVersionUID = 1L;
}

public class WriteAddedSuperClass {
    public static void main(String args[]) throws IOException {
        A a = new A();
        File f = new File("tmp.ser");
        ObjectOutput out =
            new ObjectOutputStream(new FileOutputStream(f));
        out.writeObject(a);
        out.close();
    }
}