Many warnings are printed when the java.sql.Date and java.sql.Time JDBC 4 stubs are compiled, because they override deprecated methods in java.util.Date. Example:
[javac] /code/derby/trunk1/java/stubs/jdbc4/java/sql/Date.java:25: warning: [deprecation] getHours() in java.util.Date has been deprecated
[javac] public int getHours()
We should silence these warnings to make it easier to distinguish signal from noise.