public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
        if(aValue != null){
            Message Msg = ListMsg.get(rowIndex);
            MessageDAO MsgDAO = new MessageDAO();
            switch(columnIndex){
                case 0:
                    break;
                case 1:
                    Msg.setId_message((int)aValue);
                    break;
                case 2:
                    Msg.setFrom((String)aValue);
                    break;
                case 3:
                    Msg.setObject((String)aValue);
                    break;
                case 4:
                    Msg.setContent((String)aValue);
                    break;
                
            }
         
        }
    }