Add keyword "final" to those variables which do not change after first assigment. In MonetConnection.java corrected size of array (was 7): isSet = new boolean[4]; In MonetPreparedStatement.java removed variable connection as it is already present in superclass MonetStatement (changed it into protected). In MonetResultSet.java sinplified code for assigning Connection conn and DatabaseMetaData dbmd. It is now done on instantiation. This allows them to become "final".

--- a/src/main/java/nl/cwi/monetdb/jdbc/MonetDatabaseMetaData.java
+++ b/src/main/java/nl/cwi/monetdb/jdbc/MonetDatabaseMetaData.java
@@ -26,7 +26,7 @@ import java.util.ArrayList;
  * @version 0.7
  */
 public class MonetDatabaseMetaData extends MonetWrapper implements DatabaseMetaData {
-	private Connection con;
+	private final Connection con;
 
 	// Internal cache for 3 server environment values
 	private String env_current_user;