java - Timer util wont add a new line for JLabel -

why when user timer.util jlabel wont allign string inserted in jtextpane? when use timer allign. need timer.util database wont lag.

here image when use timer swing

timer t2 = new timer(250,new actionlistener(){          public void actionperformed(actionevent arg0) {              fetchmessagedata2();         }     });     t2.start();   public static void fetchmessage(jtextpane jtep,styleddocument sd,int count  ) {      try{      string query = "select members.username, message chat join members on    chat.user_id = members.id message_id > "+count+"";     rs = st.executequery(query);     while(rs.next())     {          try {             final jlabel jp = new jlabel(rs.getstring("username")+ "\n");             jp.setalignmenty(0.75f);             jp.setfont(new font("arial",font.bold,16));             jtep.insertcomponent(jp);             sd.insertstring(sd.getlength(), ": "+rs.getstring("message")+ "\n", mainpanel.sas);         } catch (badlocationexception e1) {              e1.printstacktrace();         }           mainpanel.count++;}      }catch(exception ex){system.out.print(ex);}  } 

here image result using timer.util

timer t  = new timer();     t.schedule(new runnablemethods(), 0,500);  import java.util.timertask;   public class runnablemethods extends timertask{  @override public void run() {      subpanel1.checkofflineonline(); } } 

don't use java.util.timer's on swing event dispatch thread, edt, not thread safe use swing. either use javax.swing.timer or if must use java.util.timer, use on background thread, , make sure make swing calls on edt. swingworker work this.