Java implements ActionListener problem

Question

In connection with the previous problem , I now have a new problem. To avoid the inner class, my class now implements actionListener. My code is as follows:

public class MainGame extends JDialog implements ActionListener {

    public MainGame(JDialog owner) {
        super(owner, true);
        initComponents();
        jPanel1.setLayout(new GridLayout(3, 9, 3, 5));
        for (char buttonChar = 'a'; buttonChar <= 'z'; buttonChar++) {
            String buttonText = String.valueOf(buttonChar);
            letterButton = new JButton(buttonText);
            letterButton.addActionListener(this);
            jPanel1.add(letterButton);
        }

        newGame();
    }

    public void actionPerformed (ActionEvent action){
        if (action.getSource() == letterButton) {
            letterButton.setEnabled(false);
        }
    }

How can I call a listener on my buttons from A to Z? Because all he can listen to is the last button , which in this case is the Z button.

Thank.

Answer 1

You can listen to events from all the buttons just fine. Your problem is that you seem to think you can manipulate class fields. In fact, you do not need a field letterButtonat all for what you are trying to do:

public void actionPerformed (ActionEvent action){
    ((JButton)action.getSource()).setEnabled(false);
}

Answer 2

. .

:

if(action.getSource() instanceof JButton){
    ((JButton)action.getSource()).setEnabled(false);
}

Answer 3

, . , letterButton - . for ( letterButton = new JButton(buttonText);).

ActionListener ( ) "z".

: ActionCommand , , .

Answer 4

, , , , , - gui ActionListener. , ?

action.getSource() == letterButton

In fact, is this line even compiling? I would be surprised if this were the way you are trying to assign value to a method call that does not make sense.

it would be better

letterButton == action.getSource();

Do you see why?

edit: ignore shit above. not enough sleep or caffeine. Sigh....

In addition, I answered your previous question about how to use an anonymous inner class and should not worry about declaring the variables final.