Swing动态添加组件后需要刷新容器

Container.validate();

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1 楼 hw1287789687 2011-11-14  

class MyActionListener implements ActionListener
    {
        MainFrame mainFrame;

        public MyActionListener()
        {
            super();
        }

        public MyActionListener(MainFrame mainFrame)
        {
            this.mainFrame = mainFrame;
        }

        @Override
        public void actionPerformed(ActionEvent e)
        {
            JButton addButton = new JButton("add");
            centPane.add(addButton);
            centPane.getParent().repaint();
            centPane.repaint();
            Container c = this.mainFrame.getContentPane();
            c.validate();

        }
    }