BUT2/DEV/DEV3.1/TP02/Part1/ImageWindow.java

import javax.swing.JFrame;
import javax.swing.JLabel;

public class ImageWindow extends JFrame {

    public ImageManager manager; 
    private JLabel label; 
    
    public ImageWindow() {
        this.manager = new ImageManager();

        this.setSize(1024, 1024);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        this.addMouseListener(new ClickSwapImageEvent(this));

        this.nextImage();
    }

    public void nextImage() {
        if(this.label != null) {
            this.remove(this.label);
        }

        this.label = new JLabel(this.manager.getNextImage());
        this.label.setVerticalAlignment(JLabel.CENTER);
        this.label.setHorizontalAlignment(JLabel.CENTER);

        this.add(label);
        this.revalidate();
    }

    public void previousImage() {
        if(this.label != null) {
            this.remove(this.label);
        }

        this.label = new JLabel(this.manager.getPreviousImage());
        this.label.setVerticalAlignment(JLabel.CENTER);
        this.label.setHorizontalAlignment(JLabel.CENTER);

        this.add(label);
        this.revalidate();
    }
}