Name: avC70361 Date: 05/14/98



  The java.sql.Timestamp is incorrectly deserialized in
jdk1.2-beta4 when have been serialized in jdk1.1.6. The exception
java.io.InvalidClassException is thrown

Here is the test demonstarating the bug.
--------------TimestampTest.java--------
import java.sql.Timestamp;
import java.io.*;

public class TimestampTest {

  public static void main(String args[]) {

    Timestamp timestamp = new Timestamp(0L);

    if (args[0].equals("write")) {

      ObjectOutputStream stream = null;

      try {

        stream = new ObjectOutputStream(new FileOutputStream(args[1]));
        stream.writeObject(timestamp);
        stream.close();

      } catch(IOException e) {
        System.out.println("Couldn't write to " + args[1] + " : " + e);
        System.exit(1);
      }

      System.out.println(args[1] + " written successfully");

    } else if (args[0].equals("read")) {

      ObjectInputStream stream = null;

      try {

        stream = new ObjectInputStream(new FileInputStream(args[1]));
        timestamp = (Timestamp)stream.readObject();

      } catch(InvalidClassException e) {
        System.out.println("Failed:" + e);
        System.exit(1);
      } catch(Exception e) {
        System.out.println(
          "Failed: couldn't read from " + args[1] + " : " + e
        );
        System.exit(1);
      }

      System.out.println("Passed");

    }

    System.exit(0);

  }

}
-------------The test output-----------
Under jdk1.1.6:
<avv@stardust(pts/24).312> java -fullversion
java full version "JDK1.1.6N"
<avv@stardust(pts/24).313> java TimestampTest write file.ser
file.ser written successfully
<avv@stardust(pts/24).314> java TimestampTest read file.ser
Passed

Under jdk1.2beta4:
<avv@stardust(pts/2).570> java -fullversion
java full version "JDK-1.2beta4-E"
<avv@stardust(pts/2).571> java TimestampTest read file.ser
Failed:java.io.InvalidClassException: java.sql.Timestamp; Local class not compatible: stream classdesc serialVersionUID=2745179027874758501 local class serialVersionUID=9006693602311240427

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