String squad_name=JOptionPane.showInputDialog("請輸入球員名：");

        Squad.setModel(dmsquad);
        dmsquad.clear();
      listOfSquad[Teamlist.getSelectedIndex()][0].add(squad_name);
      for(Object e:listOfSquad[Teamlist.getSelectedIndex()][0]){
       System.out.println(Teamlist.getSelectedIndex()+":"+e.toString());
       dmsquad.addElement(e.toString());