make code compile using Java 1.6 compiler

tyumac:gridsql tyu$ java -version
java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065)
Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01-279, mixed mode)
tyumac:gridsql tyu$ uname -a
Darwin tyumac.local 10.4.0 Darwin Kernel Version 10.4.0: Fri Apr 23 18:28:53 PDT 2010; root

nu-1504.7.4~1/RELEASE_I386 i386 i386

cp -R ../../apps/gridsql/obj/cpy/* ../../apps/gridsql/obj/src
javac -g:none -d ../../apps/gridsql/obj/bin -classpath ../../apps/gridsql/obj/bin:../../apps/gridsql/lib/log4j.jar:../../apps/gridsql/lib/jline-0_9_5.jar:../../apps/gridsql/lib/edb-jdbc14.jar:../../apps/gridsql/lib/postgresql.jar -sourcepath ../../apps/gridsql/obj/src \
../../apps/gridsql/obj/src/com/edb/gridsql/communication/ConnectorFactory.java \
../../apps/gridsql/obj/src/com/edb/gridsql/communication/BroadcastConnector.java \
../../apps/gridsql/obj/src/com/edb/gridsql/communication/ClusteredBroadcastConnector.java \
../../apps/gridsql/obj/src/com/edb/gridsql/communication/ClusteredConnector.java \
../../apps/gridsql/obj/src/com/edb/gridsql/communication/SocketConnector.java \
../../apps/gridsql/obj/src/com/edb/gridsql/engine/io/RequestMessage.java \
../../apps/gridsql/obj/src/com/edb/gridsql/parser/SqlAddNodesToDB.java \
../../apps/gridsql/obj/src/com/edb/gridsql/parser/SqlDropNodesFromDB.java \
../../apps/gridsql/obj/src/com/edb/gridsql/common/ErrorMessages.java \
../../apps/gridsql/obj/src/com/edb/gridsql/protocol/ProtocolManager.java \
../../apps/gridsql/obj/src/com/edb/gridsql/protocol/PgProtocolHandler.java
../../apps/gridsql/obj/src/com/edb/gridsql/common/ResultSetImpl.java:44: com.edb.gridsql.common.ResultSetImpl is not abstract and does not override abstract method updateSQLXML(java.lang.String,java.sql.SQLXML) in java.sql.ResultSet
public class ResultSetImpl implements java.sql.ResultSet {
^
../../apps/gridsql/obj/src/com/edb/gridsql/misc/combinedresultset/ServerResultSetImpl.java:35: com.edb.gridsql.misc.combinedresultset.ServerResultSetImpl is not abstract and does not override abstract method updateSQLXML(java.lang.String,java.sql.SQLXML) in java.sql.ResultSet
public class ServerResultSetImpl implements java.sql.ResultSet, ServerResultSet {
^
../../apps/gridsql/obj/src/com/edb/gridsql/parser/core/CSQLParser.java:10013: cannot find symbol
symbol : constructor dropTable(com.edb.gridsql.parser.core.syntaxtree.NodeToken,com.edb.gridsql.parser.core.syntaxtree.NodeToken,com.edb.gridsql.parser.core.syntaxtree.TableName)
location: class com.edb.gridsql.parser.core.syntaxtree.dropTable
{if (true) return new dropTable(n0,n2,n4);}
^
Note: ../../apps/gridsql/obj/src/com/edb/gridsql/misc/combinedresultset/ServerResultSetImpl.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

This is known problem.
Java 1.6 introduced incompatible JDBC changes.
We are planning to port the code.