The toString() method of a Query object always returns null, even when (queryObject == null) is false. Here is the output of the attached test case:

CLASSPATH = ;c:/db-derby-snapshot-10.2.0.4-423199/lib/derby.jar;c:/db-derby-snapshot-10.2.0.4-423199/lib/derbyclient.jar;c:/db-derby-snapshot-10.2.0.4-423199/lib/derbynet.jar;c:/db-derby-snapshot-10.2
.0.4-423199/lib/derbyTesting.jar
JAVA_HOME = c:/Program Files/Java/jdk1.6.0
toString(): aq is null
value test: aq is NOT null!!