java - Display data in JTable with selection of check boxes in Swing -

    string calltype = " ";      if (local_checkbox.isselected()) {         calltype = calltype + "and toc ='local'";     }      if (std_checkbox.isselected()) {         calltype = calltype + "and toc ='std'";     }     if (isd_checkbox.isselected()) {         calltype = calltype + "and toc ='isd'";     }     if (incoming_checkbox.isselected()) {         calltype = calltype + "and toc ='incoming'";      }     if (transfered_checkbox.isselected()) {         calltype = calltype + "and toc ='transfered'";      }     if (conference_checkbox.isselected()) {         calltype = calltype + "and toc ='conference'";     }     if (missed_checkbox.isselected()) {         calltype = calltype + "and toc ='missed'";     }      int = 4;     calltype = calltype.substring(i);     calltype = calltype.replace("and", "or");     calltype = "and\t" + calltype;     i++;   try {          class.forname("com.mysql.jdbc.driver").newinstance();         connection con1 = drivermanager.getconnection(db_url, user, pass);         checkuserinputs chkusrin = new checkuserinputs();         query = chkusrin.formatquery(reporttype, resultdatefrom, resultdateto, empid, trunk, dialedno, duration, site, authcode, extension, cost, department, calltype, time);         system.out.println(query);         ps = con1.preparestatement(query);         rs = ps.executequery();         table1.setmodel(dbutils.resultsettotablemodel(rs));  }catch(exception e) {}     ` 

i have multiple check boxes. type of calls, check boxes std, isd, missed etc.. in database have column named "type of calls" have values std, isd, missed etc... task given me follows :

1. to display data in jtable based on selection of check boxes. , if user selects check box std, table show me std calls other details, , if user selects check box isd , table show me isd calls other details , on. i'm able this.
2. problem when user selects multiple check boxes. select isd , std, table has show std , isd calls values.

the function formatquery has queries , conditions fetch data database.

how implement this?