Java - ผิดตรงไหน ครับ ไม่ error แต่ไม่แสดงผล ช่วยด้วยครับ

void ShowData () throws Exception
 {
    String sql1 = "select * from add_department";
    Connection c1 = new MyConnect().getConnection();
    ResultSet rs1 = c1.createStatement().executeQuery(sql1);
    
    DefaultTableModel model;
    model = (DefaultTableModel)jTable1.getModel();
    
    int totalRow = jTable1.getRowCount() - 1;
    while (totalRow > -1)
{
        model.removeRow(totalRow--);
 }
    while (rs1.next())
{
    Vector row = new Vector();
    row.add(rs1.getString("code_department"));
    row.add(rs1.getString("name_department"));
    
    model.addRow(row);
 }
    jTable1.setModel(model);
 }