Adding a JButton when another JButton is pressed

Question

I have a JButton which I want to create a new JButton with when it is pressed I have added an ActionListener that looks like this, but it doesn't add another JButton.

public void actionPerformed(ActionEvent e){
        Object command = e.getSource();
        if(command.equals(play)){
            ImageIcon i1 = new ImageIcon("NewGame.png");
            width = i1.getIconWidth();
            height = i1.getIconWidth();
            newGame = new JButton(i1);
            newGame.setBorderPainted(false);
            newGame.setContentAreaFilled(false);
            newGame.setSize(width, height);
            newGame.setLocation(600,100);
            add(newGame);
            System.out.println("It Works");
        } 
    } 

How would I make it so that when I press the already existing JButton this one will be added?

Answer 1

Make sure to revalidate and repaint after adding the button

revalidate();
repaint();

From the use of setSize and setLocation , it appears you are using a absolute positioning or null layout. Use a layout manager.

Answer 2

添加后必须调用repaint() 。

Answer 3

如果没有异常，则需要刷新或重新粉刷容器，该容器将使新按钮变旧。