How to compare a typed Jtextfield String with a randomized Imageicon in a package?

Question

At the level of Random in a package of Imageicon of flags of countries how to compare if it was typed right the name of the flag of the country in a Jtextfield by the user?

To randomize the images of the flags I’m getting so:

File file = new File("src/flagsII");
    String[] imageNames = file.list();
    Random rand = new Random();

I use one button to randomize the image and another to compare, since I can’t do this with a single button.

btnFlag.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {

                    // Random
                    int index = rand.nextInt(8);
                    Image im = new ImageIcon(this.getClass().getResource("/flagsII/" + imageNames[index])).getImage();
                    ImageIcon iconLogo = new ImageIcon(im);
                    jlbFlag.setIcon(iconLogo);
                }
            });         
            jContentPane.add(btnFlag);
        }
        return jContentPane;
    }

Now to compare I’m not getting:

int score = 0;

    public void actionPerformed(ActionEvent e) {

        // Random
        // int flags = (int) (8 * Math.random() + 1);
        // int flags = (int) (Math.random() * 8);
        
        String country = textField.getText().toLowerCase();

        switch (country) {

        case "Australia":
            // jlbFlag.setIcon(new
            // ImageIcon(getClass().getResource(("flags/Australia.png"))));
            if (imageNames.equals(country)) {
                JOptionPane.showMessageDialog(null, "Correct", "Geography Quiz", JOptionPane.INFORMATION_MESSAGE);
                score = score + 1;
                lblScore.setText("Score: " + score);

            } else {
                Toolkit.getDefaultToolkit().beep();
                JOptionPane.showMessageDialog(null, "incorrect!", "Geography Quiz", JOptionPane.ERROR_MESSAGE);
                score = score - 1;
                lblScore.setText("Score: " + score);
            }
            break;

        case "Brazil":
            // jlbFlag.setIcon(new ImageIcon(getClass().getResource(("flags/Brazil.png"))));
            if (imageNames.equals(country)) {
                JOptionPane.showMessageDialog(null, "Correct", "Geography Quiz", JOptionPane.INFORMATION_MESSAGE);
                score = score + 1;
                lblScore.setText("Score: " + score);

            } else {
                Toolkit.getDefaultToolkit().beep();
                JOptionPane.showMessageDialog(null, "incorrect!", "Geography Quiz", JOptionPane.ERROR_MESSAGE);
                score = score - 1;
                lblScore.setText("Score: " + score);
            }
            break;

        case "China":
            // jlbFlag.setIcon(new ImageIcon(getClass().getResource(("flags/China
            // (2).png"))));
            if (imageNames.equals(country)) {
                JOptionPane.showMessageDialog(null, "Correct", "Geography Quiz", JOptionPane.INFORMATION_MESSAGE);
                score = score + 1;
                lblScore.setText("Score: " + score);

            } else {
                Toolkit.getDefaultToolkit().beep();
                JOptionPane.showMessageDialog(null, "incorrect!", "Geography Quiz", JOptionPane.ERROR_MESSAGE);
                score = score - 1;
                lblScore.setText("Score: " + score);
            }
            break;
default:
            Toolkit.getDefaultToolkit().beep();
            JOptionPane.showMessageDialog(null, "incorrect!", "Geography Quiz", JOptionPane.ERROR_MESSAGE);
            break;
        }
        System.out.println(imageNames);

    }

And to declare on the Submit button I declare this:

jbtSubmit.addActionListener(this);

Answer 1

As it stands now, the code compares the typed text with the country list, which makes no sense. You need to store the name of the country drawn in a field, to make the comparison when the user presses "Submit", so it would not be necessary to predict all cases (the switch could be removed).

I suggest to define a mapping with country names and the respective files with the flags (there are several ways to do this), so that the user does not need to type "China (2). jpg" to settle the question. When drawing the index, the corresponding element of the name is saved, and the respective flag is displayed in the JLabel.