Java - How to add new JLabel and JTextPane to JPanel when button is pressed

Question

I have a JPanel to which when a button is pressed I want to add a new JLabel and JTextField too. However, I can't seem to get it working.

Is there an issue with my ActionListener, and if not, how could this be achieved?

JPanel south = new JPanel();
JButton add = new JButton("Add");
ActionListener addListener = new ActionListener() {

     @Override
     public void actionPerformed(ActionEvent e) {
           JLabel mL = new JLabel("MOD: ");
           mR.add(mL);
           JTextField mM = new JTextField(10);
           mR.add(mM);
           mR.repaint();

     }

};
add.addActionListener(addListener);
south.add(add);
add(south, BorderLayout.NORTH);

The layout of the mR panel is a grid layout set to allow multiple rows and two columns.

Answer 1

在repaint();之前调用mR.revalidate() repaint();

Answer 2

请参阅我对上一个SO问题的回答，以获取一些示例代码，该示例代码将组件动态添加到容器中