Name: bsC130419 Date: 06/28/2001


java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)


We use the PROTOCOL_VERSION_1 flag in serialization to maintain compatibility
with a product first released under JDK 1.1.7. We use the following code to
set the protocol, in a subclass of ObjectOutputStream.

try {
     // see if the useProtocolVersion method is implemented
     Method m = getClass().getMethod("useProtocolVersion", new Class[] {
Integer.TYPE });
    Field f = getClass().getField("PROTOCOL_VERSION_1");
    m.invoke(this, new Object[] { new Integer(f.getInt(this)) });
} catch (NoSuchMethodException e) {
    // no problem, if the method's not there, we don't call it
}

Under 1.4beta, this is throwing a NoSuchFieldException, implying that I can't
get the PROTOCOL_VERSION_1 field. This code has worked in all previous
releases of Java.
(Review ID: 127515)
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