For JDK 1.4 build 81
====================

jtools-sqe:/home/vr128054/vertest/4496625 25 % javadoc -J-version
java version "1.4.0-beta3"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta3-b81)
Java HotSpot(TM) Client VM (build 1.4.0-beta3-b81, mixed mode)

For the following testcase, part of verification for 4496625
============================================================

jtools-sqe:/home/vr128054/vertest/4496625 26 % more t.java
public class t
{
}

public class t
{
}

Javadoc has the following behaviour
====================================

jtools-sqe:/home/vr128054/vertest/4496625 27 % javadoc t.java
Loading source file t.java...
Constructing Javadoc information...
t.java:5: duplicate class: t
public class t
       ^
Standard Doclet version 1.4 beta (04 Aug 2001)

javadoc: No public or protected classes found to document.
1 error
1 warning

===============================================================
And it is reporting "no public" classes to document while there is one barring
the duplicate. this error message is not relevant.