Name: ooR10001 Date: 11/16/2000


Field 'fRequestedAttributes' change type in jdk build 1.4beta-B40 from 'Hashtable' to
'HashMap'. There causes compatibility problem when attempt
to deserialize object from jdk1.3 stream in jdk1.4beta-B40.
The following test showing this bug:
------------------------------------------
public class test {

  public static void main(String[] args) {
    if (args.length == 0) {
        java.awt.Font m = new java.awt.Font(null);
        try {
            java.io.FileOutputStream fs =
                new java.io.FileOutputStream("test.ser");
            java.io.ObjectOutputStream oos =
                new java.io.ObjectOutputStream(fs);
            oos.writeObject(m);
            oos.close();
} catch (java.io.IOException e) {
            System.out.println("FAILED:" + e);
}
    } else {
        Object m = null;
        try {
            java.io.FileInputStream fs =
                new java.io.FileInputStream("test.ser");
            java.io.ObjectInputStream ois =
                new java.io.ObjectInputStream(fs);
            m = ois.readObject();
            ois.close();
} catch (java.io.IOException e) {
            System.out.println("FAILED:" + e);
} catch (ClassNotFoundException e) {
            System.out.println("FAILED:" + e);
}
        if (m instanceof java.awt.Font) {
            System.out.println("OKAY");
} else {
            System.out.println("FAILED");
}
    }
  }

}
------------------------------------------

Execiting following commands to create stream with java.awt.Font object under jdk1.3:
%javac test.java
%java test
----------------------
Executing following command to deserialize object in jdk1.4beta-B40:
%javac test.java
%java test tt
----------------------
Result of execution:
----------------------
Exception in thread "main" java.lang.ClassCastException: Assigning instance of class
java.util.Hashtable to field java.awt.Font#fRequestedAttributes
        at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2270)
        at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:519)
        at java.awt.Font.readObject(Font.java:953)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.io.ObjectInputStream.invokeObjectReader(ObjectInputStream.java:2213)
        at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1410)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:386)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:236)
        at test.main(test.java:23)
----------------------

This needs to be fixed.

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