automatic increment for field

hi to all


i am new to this forum . i want to automatical increment for serial number in the table . i am create table ,sequence for that table and trigger for that .


create table test (id number, testdata varchar2(255));

create sequence test_seq
start with 1
increment by 1
nomaxvalue;

create trigger test_trigger
before insert on test
for each row
begin
select test_seq.nextval into :new.id from dual;
end;

after creating this i am inserting values to this table from action class in struts but i am able to insert all values but i am not getting that how to insert this test_seq.nextval in the table.

PreparedStatement stmt = Database.create().prepareStatement("INSERT INTO admininsertbook(sno,bookname,author,available) VALUES (?,?,?,?) ");
for(int i=0; i< arrayList.size(); i++){

stmt.setInt(1, Database.getNextVal());
stmt.setString(2, (String)arrayList.get(0));
stmt.setString(3, (String)arrayList.get(1))
stmt.setString(4, (String)arrayList.get(2))
stmt.addBatch();

}
stmt.executeBatch();