java.sql.Connection.TRANSACTION_READ_UNCOMMITED doesn't work in Oracle?

Hello experts,
Using JDBC to connect to an oracle db.

when I set the transaction isolation level for my connection object as:

then run time error said:
Message: READ_COMMITED and SERIALIZABLE are the only valid transaction levels

Does that mean I can't use TRANSACTION_READ_UNCOMMITED level with Oracle???
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Yes - Oracle does not support READ UNCOMMITTED.
Oracle only supports READ_COMMITED and SEARIALIZABLE as being very obvious in your error msg.
To see it for yourself, you can read this chapter from Oracle doc
In case the link doesn't work, you can go to Oracle site and find the followng document:

Oracle® Database Application Developer's Guide - Fundamentals
10g Release 1 (10.1)

Read chapter 5 (pretty short)

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