java.lang.ClassCastException: oracle.sql.TIMESTAMP cannot be cast to java.sql.Timestamp

Question

I am working on an application that streams ResultSet over a network. I ended up using a CachedRowSetImpl class. But when I connect to an Oracle DB, I get an error like this

Answer 1

This is because oracle.sql.TIMESTAMP is not derived from java.sql.TIMESTAMP:

java.lang.Object
  -> oracle.sql.Datum
     -> oracle.sql.TIMESTAMP

You can't cast the former into the later.

Instead use oracle.sql.TIMESTAMP.timestampValue():

public Timestamp timestampValue(Calendar cal) throws SQLException

Calls toTimestamp to convert internal Oracle Date and Calendar to a Java Timestamp.