Java Reference
In-Depth Information
Figure 6.3. The
JDBCAdapter
class adapts information in a database table to appear in
Swing
JTable
component.
The
JDBCAdapter
class constructor establishes a database connection and creates
a
Statement
object. The adapter passes queries to the
Statement
object and makes
the results available in a GUI component.
The
JDBCAdapter
class assumes that a client will call
executeQuery()
before making
calls to extract data from the query. The results of not providing a query are somewhat
unpredictable. Noticing this, suppose that you decide to subclass
JDBCAdapter
with
an
OzJDBCAdapter
class that throws a
NoQuery
exception if a client forgets to issue a
query before asking for data.
