close() - JDO JDOConnection's method

Returns this connection to the JDO implementation. The object must be returned to the JDO implementation prior to calling any JDO method or performing any action on any persistent instance that might require the JDO implementation to use a connection. If the object has not been returned and the JDO implementation needs a connection, a JDOUserException is thrown.
JDO 2.0

This documentation page is derived (with some adjustments) from the JDO 2.2 API
and is available under the terms of the Apache License, v. 2.0.