Hi guyz?

I have a JComboBox which i have named "venue_JCB" i want to load details from a tbl column on form load at the initcomponets() i have declared the method "accessDBinit() ;" and after the initComponets() i have implemented the accessDBinit(); method as follows: ================================code============================

void accessDBinit() //Get Student List in the List Box { try { sql = "SELECT classLevel FROM class_session ORDER BY classLevel"; java.lang.Class.forName("com.mysql.jdbc.Driver"); Connection con2=DriverManager.getConnection("jdbc:mysql:///coast","root",""); Statement stmt2 = (Statement)con2.createStatement(); boolean hasResults = stmt2.execute(sql); if(hasResults) { ResultSet rs2 = stmt2.getResultSet(); if(rs2!=null) { displayResultsinit(rs2); } db.stmt.close(); }

          }
          catch(Exception e)
          {
            System.out.println(e+"Error in connection");
          }
    }
    void displayResultsinit(ResultSet r) throws SQLException
    {
            ResultSetMetaData rmeta = r.getMetaData();
            int numColumns=rmeta.getColumnCount();
            while(r.next())
            {
                for(int i=1;i<=numColumns;++i)
                {
                    if(i<=numColumns)
                    {
                        venue_JCB.addItem(r.getString(i));
                    }
                }
            }
    }

====================================end of code===================================

the method works (Populate the combobox) but at the output bar i get the following on form load and also whenever i select a component from the combobox ======= error=====

java.lang.NullPointerExceptionError in connection

could some one please tell me where i am going wrong with the method?

Thanks in advance

regards Malachi