private   void  jComboBox1ActionPerformed(java.awt.event.ActionEvent evt) {
        // Add your handling code here:
        String project = jComboBox1.getSelectedItem().toString();
        
           try {  
    Statement ValuesSt = conn.createStatement();
     if  (project != ""){
    ResultSet rsValues = ValuesSt.executeQuery("select  KodSyst, Project, proj, L, B, H, T, Category  from Loading_DocSector WHERE Project:= "+project+" ORDER BY proj");
     while  (rsValues.next()) {
            jList1.addElement(rsValues.getString("proj"));

    }
    rsValues.close();
    ValuesSt.close();
    jList1.setSelectedIndex( 0 );
    jList1.setVisibleRowCount(- 1 );
    
    }
    } catch (SQLException ex) {
   JOptionPane.showMessageDialog( this , "SQLException: " + ex, "Error", JOptionPane.ERROR_MESSAGE);
     }
        CB2830ActionPerformed();
    }

        DefaultListModel dlm = (DefaultListModel) jList1.getModel();

            dlm.addElement(rsValues.getString("proj"));