Java Database Connectivity (JDBC)

I know that this is already in the forum, but there were no answers in the threads that I reviewed.

I have two types in the database...
an object:
CREATE OR REPLACE
TYPE TEST_OBJ AS object (ID varchar2(8), VAL number)

and a collection:
CREATE OR REPLACE
TYPE TEST_OBJ_TAB AS TABLE OF TEST_OBJ

I want to pass a nested object array to a stored proc:
CREATE OR REPLACE PROCEDURE p_TEST_PROC
(p_tab in TEST_OBJ_TAB)

IS
l_id varchar2(8);
l_val number;
BEGIN
for i in p_tab.FIRST..p_tab.LAST loop
l_id := p_tab(i).ID;
l_val := p_tab(i).VAL;
end loop;
END p_TEST_PROC;

My java:
Object[][] objs = new Object[2][2];

objs[0][0] = "12345678";
objs[1][0] = "12345678";
objs[0][1] = new Integer(1);
objs[1][1] = new Integer(2);

con = null;
String user = "user";
String password = "pwd";
String machine = "server";
String database = "db";
String port = "1521";
String url = "jdbc:oracle:thin:@" + machine + ":" + port + ":"
+ database;
String driver = "oracle.jdbc.driver.OracleDriver";
Class.forName(driver);

System.out.println(url);

con = DriverManager.getConnection(url, user, password);
con.setAutoCommit(false);

StructDescriptor desc =StructDescriptor.createDescriptor("TEST_OBJ_TAB",con);
STRUCT struct = new STRUCT(desc,con,objs);

cstmt = con.prepareCall(CSTMT_CALL);
cstmt.setObject(1,struct,Types.STRUCT);
cstmt.execute();

The SQLException is: Inconsistent java and sql object types. I am not sure what this means. Is there some type mapping that I still have to do?

Regards,

Jimmy