java - Refreshing JTable data using JcomboBox items coming from Access Database -

how refresh jtable ?

here code.

public void itemstatechanged(itemevent evt)     {         string text=(string)to_cmb2.getselecteditem();         try          {             //  connect access database                 connection con=drivermanager.getconnection("jdbc:odbc:flightdsn");                 statement s=con.createstatement();             //  read data table                 resultset rs = s.executequery("select flightno,city,to,arrives,departs i_flights_routes ='"+text+"' ");                 resultsetmetadata md = rs.getmetadata();                 int columns = md.getcolumncount();              //  column names             (int = 1; <= columns; i++)              {                 columnnames.addelement(md.getcolumnname(i));             }             //  row data             while (rs.next())              {                 vector<object> row = new vector<>(columns);                  (int = 1; <= columns; i++)                  {                     row.addelement(rs.getobject(i));                 }                  data.addelement(row);             }             rs.close();             s.close();             con.close();         }          catch (exception e)          {             system.out.println(e);         }         //  create table database data         jtable table = new jtable(data, columnnames)          {             public class getcolumnclass(int column)              {                 (int row = 0; row < getrowcount(); row++)                  {                     object o = getvalueat(row, column);                      if (o != null)                      {                         return o.getclass();                     }                 }                 return object.class;             }         };         jscrollpane scrollpane = new jscrollpane(table);         scrollpane.setbounds(50,10,400,200);         td.add(scrollpane);         // td jpanel object         td.setvisible(true);     } 

you're creating entirely new jtable -- don't that. use same jtable

• modify jtable's model if want add new data existing data
• or if want totally replace data in table, create new defaulttablemodel (or other tablemodel) , set jtable's model via `setmodel(...).

also, aside want avoid using null layouts , setbounds(...) creates inflexible gui's terrible on other platforms or other resolutions , difficult upgrade , manage.