The generification of Comparable is not fully backward compatible at the
source level when generics are enabled. The type of the argument of
compareTo() in its generic form must be of the type of Comparable's
type parameter. For Float this is Float; for Double it is Double.
Consequently, there are rare cases in which code must be changed to be
compliant with generics. JdbcOdbcPreparedStatement contains one:

if (new Float(0).compareTo(x) == 0) ...

where x is of type Object but is known in the program to contain a Float.
The simple fix is to case x to type Float, but given how silly this code is
it could probably be rewritten as the more straightforward and efficient

        if (((Float)x).floatValue() == 0) ..

In addition...

In 1.5, "enum" will be a keyword when sources are compiled with -source 1.5,
as J2SE will be compiled. Therefore, any cases in which enum is used as an
identifier will have to be changed. The following sources are affected:

src/share/classes/sun/jdbc/odbc/JdbcOdbcPreparedStatement.java
src/share/classes/sun/jdbc/odbc/JdbcOdbcStatement.java