在哪里放置ActionListener接口？

Question

I got stuck in my code, making a game GUI in Java.

I have two packages gameCore and view. GameCore consists of "main" in which I constructed JFrame object that is imported from view package.

In the view package, I made MainFrame and ControlView classes.

In a constructor of MainFrame, it will call "setControlView" method and then will add "getControlView().getControlPanel()" on the mainFrame.

So finally buttons that I want to link to ActionListener are inside "controlPanel"

I tried many locations to implement ActionListener interface, but I still can't solve the problem.

Should I make implementation on the GameCore main class? or anywhere?

package view;

import javax.swing.*;
import java.awt.*;

public class MainFrame extends JFrame {

    private MainFrame console;
    private ControlView controlView;
    private PlayView playView;

    public MainFrame(String title) throws HeadlessException {

        super(title);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(350, 350);
        this.setControlView();
        this.add(getControlView().getControlPanel());
        this.setVisible(true);

    }

    public void setControlView() {
        this.controlView = new ControlView();
    }

    public void setPlayView() {
        this.playView = new PlayView();
    }

    public MainFrame getConsole() {
        return console;
    }

    public ControlView getControlView() {
        return controlView;
    }

}

package view;

import javax.swing.*;
import java.awt.*;

/**
 * Created by hyunjung on 09/02/2017.
 */
public class ControlView extends JPanel {

    private JPanel controlPanel;
    private JLabel titleLabel;
    private JLabel creditLabel;
    private JPanel btnPanel;

    private JButton playBtn;
    private JButton recordBtn;


    public ControlView () {

        controlPanel = new JPanel();
        controlPanel.setBackground(new Color(143, 225, 81));
        controlPanel.setLayout(new GridLayout(3, 1));

        titleLabel = new JLabel("BLACK JACK 2017", JLabel.CENTER);
        titleLabel.setFont(new Font("serif", Font.BOLD, 20));

        creditLabel = new JLabel("@pretty_much games", JLabel.CENTER);
        creditLabel.setFont(new Font("serif", Font.PLAIN, 14));

        btnPanel = new JPanel( new GridBagLayout());
        btnPanel.setBackground(new Color(143, 225, 81));
        playBtn = new JButton("Play");
        recordBtn = new JButton("Record");

        btnPanel.add(playBtn);
        btnPanel.add(recordBtn);

        controlPanel.add(titleLabel);
        controlPanel.add(btnPanel);
        controlPanel.add(creditLabel);
    }

    public JPanel getControlPanel() {
        return controlPanel;
    }

    public JButton getPlayBtn() {
        return playBtn;
    }

    public JButton getRecordBtn() {
        return recordBtn;
    }
}

Answer 1

here you have an example:

playBtn.addActionListener(new ActionListener(){

    @Override
    public void actionPerformed(ActionEvent arg0) {
        // TODO Auto-generated method stub  
    }

});

this has to be implemented after initializing the button. so it makes sense in this code block:

playBtn = new JButton("Play");
recordBtn = new JButton("Record");

btnPanel.add(playBtn);
btnPanel.add(recordBtn);