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Asked: 2026-05-11T00:51:39+00:00

I’m storing a simple java.util.date in an Oracle XE database via hibernate. When testing

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I’m storing a simple java.util.date in an Oracle XE database via hibernate.

When testing with JUnit if I can retrieve the correct value, I get an error like this:

junit.framework.AssertionFailedError:    expected:<Sun Dec 28 11:20:27 CET 2008>    but was:<2008-12-28 11:20:27.0>

The value is stored in an Oracle Date column (which should have a second-precision) which looks okay to me. Also, I’m surprised that 11:20:27 is not equal to 11:20:27.0. Or does this have to do with timezones?

Any help is welcome.

Thorsten

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1 Answer

  1. Okay, worked some more on it …

    1. Oracle Date columns only store values with an accuracy of a second.

    2. Java Dates do contain milliseconds, but they are typically not printed. So

      expected:

    was actually created by a date like 11:20:27,345, which is of course not equal to 11:20:27.0

    Solution:

    • either only use full second dates to store and retrieve or
    • get hibernate to create the correct Oracle Datatype (TIMESTAMP) – this is very dependent on the dialect specified in the hibernate config (OracleDialect and Oracle10gDialect create different types).
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