CODEWITHSUNDEEP
javalistactionlistener
user2938
user2938

Reputation: 23

how to connect JButtons from a list to actionListener

I have a dynamic number of JButtons in a list and need help to connect them to the actionListener

I first create the buttons based on a list called alt:

for(int i =0;i<alt.size();i++) {
        JButton button = new JButton (alt.get(i));
        button.addActionListener(this); 
        buttonList.add(button);
    }

Later I add the buttons like this

private void gui(List<JButton> bList) {

    f = new JFrame("window");
    f.setLayout(new BorderLayout());    
    f.setVisible(true); 

    JPanel buttonPane = new JPanel();
    buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.PAGE_AXIS));

    for(int i =0;i<bList.size();i++) {
        buttonPane.add(bList.get(i));
    }
    f.add(buttonPane, BorderLayout.SOUTH);
 }

I know there will never be more than 4 buttons. So how can I connect to the right button in the ActionListener ? without them being declared outside the scope of gui or individually named?

    public void actionPerformed(ActionEvent e) {


        if(e.getSource() == ?) {  
        } else if (e.getSource() == ?) {
        } else if (e.getSource() == ?){
        }else if (e.getSource() == ?){
        }
}

Upvotes: 1

Views: 26

Answers (1)

user1234SI.
user1234SI.

Reputation: 1860

If your buttons are doing actions, you should implement separate Action Listeners for each button, otherwise in your e.getSource() == ? the ? should be a JButton instance, for example : e.getSource() == bList.get(0)

Upvotes: 1

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