如何从其他类制作的按钮对象中获取源代码

Question

i am making a memory game using java swing. so far i have made a class that returns custom JButtons with an image already in them (unfliped). in the main class i am creating objects of that class and add them to the panel. everything works but when i am adding the action listeners the getSource method returns a JButton and as a result i cant use the methods from inside the custom buttons class. How can i use getSource and create a button from the custom buttons class?

i have tried casting the button returned from the getSource method to Buttons(custom buttons class) but it didnt work.

public class Buttons extends JButton{
    int id;
    JButton butt;
    private static int x=0;

    public Buttons() throws IOException{
        butt=this.retButton();
    }

    public JButton retButton() throws IOException{
        BufferedImage img = 
        ImageIO.read(getClass().getResourceAsStream("/folder/flipped.png"));
        ImageIcon image = new ImageIcon(img);
        JButton button = new JButton();
        button.setName(Integer.toString(x));
        button.setIcon(image);
        button.setBackground(Color.white);
        x+=1;
        return button;

    }
    public JButton getButton(){
        return this.butt;
    }
    public int getId() {
        return id;
   }
}

in the main class i am using:

    for (int i=0; i<12; i++){
        jb[i] = new Buttons();
        jb[i].getButton().addActionListener(this);
        jb[i].setId(cardNums.get(i));
        panel.add(jb[i].getButton());
    }

    frame.add(panel, BorderLayout.CENTER);

    frame.pack();

@Override
public void actionPerformed(ActionEvent e) {
    Object source = e.getSource();
    if (source instanceof JButton) {
        JButton btn = (JButton)source;
        System.out.println("hey");}

action listener works but since btn is a JButton it wont let me use the getId method of the Buttons class.

Answer 1

Why do you want your Buttons instance to have a separate button as an attribute? You already ARE a button. This seems like a poor design choice.

That said, since you set the button name to be the creation index,you could just use source.getName() and convert it back to an int, then use that int as an index for the jb array.