Container container = null;
BorderLayout bly=new BorderLayout();
JPanel jp=new JPanel(bly);
container.invalidate();
JLabel label = new JLabel("11");
jp.add(label);
container.validate();
Container container = null;
BorderLayout bly=new BorderLayout();
JPanel jp=new JPanel(bly);
container.invalidate();
JLabel label = new JLabel("11");
jp.add(label);
container.validate();