JPanel doesn't update when adding Component in another class

Question

I\'m fairly new to Java Swing and I\'m running into a few problems.

1. As a side question, when making a fairly large Java Swing Application, what is the best wa

Answer 1

You should revalidate your panel

@Override
public void actionPerformed(ActionEvent e) {
   JButton temp = new JButton("temp");
   mPanel.add(temp);
   mPanel.revalidate();
   mPanel.repaint();
}