java - JTable not showing data -

i have got problem. connect mssql java. return data sql.i want show jtable data didnt assign jtable defaulttablemodel. code:

public void displaytable(resultset result,resultsetmetadata resultmeta){     int i;     defaulttablemodel table = new defaulttablemodel();      int columncount=resultmeta.getcolumncount();     system.out.println(columncount);    try{     for(i=1;i<=columncount;i++)         table.addcolumn(resultmeta.getcolumnname(i));      while(result.next()){             string [] row=new string[columncount];             for(int j=1;j<=columncount;j++)                 row[j-1]=result.getstring(j);             table.addrow(row);        }         for(int =0;a<columncount;a++){    system.out.println(table.getcolumnname(a));     }     tablo.setmodel(table);    }catch(exception ex){ system.out.println(ex);  } }