Null in prepares statement

Question

Hi All,
I had the following code but it shows me an errors
Will you please find out where i made mistake.
Is it possible to use nulls in prepared statement as below.
String result=null;
               int i=null;
               int j=null;
try
                    String query= "Select TO_NUMBER(pk2_value) organization_id
                         , TO_NUMBER(pk1_value) item_id
                         FROM ENG_CHANGE_SUBJECTS
                         WHERE pk1_value IS NOT NULL
                         AND pk2_value IS NOT NULL
                         AND change_line_id IS NULL
                              AND entity_name like 'EGO_ITEM'
                         AND change_id = ?";
               PreparedStatement pstmt=oaapplicationmodule.getOADBTransaction().getJdbcConnection().prepareStatement(query);
               ResultSet rs=pstmt.executeQuery();
               while(rs.next())
               i=rs.getInt("item_id");
               j= rs.getInt("organization_id");
               result+=i+"\t\t"+j+"\n";
               catch(SQLException sqlexception)
               sqlexception.printStackTrace();
Regards
Zaheer

Answer 1

i=rs.getInt("item_id");
j= rs.getInt("organization_id");
this is not the way
try this
i=rs.getInt(1)
j= rs.getInt(2);
Also you are not setting the value for "change_id = ?" in your prepare statement before executing the query
like
pstmt.setLong(1, "value to be set");
pstmt.executeQuery();