PIbd-23_Minhasapov_R.H._Excavator_Hard/FormGallery.java

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

public class FormGallery extends JFrame {
    private static final Random rnd = new Random();
    private JPanel contentPanel;
    private JButton buttonRefresh;
    private JPanel pictureBox;
    private IDrawningObject first;
    private IDrawningObject second;
    private IDrawningObject third;

    private final EntityWithRollers<EntityTracktor, IDrawningRollers> storage;

    public FormGallery() {
        setTitle("Галлерея");
        setContentPane(contentPanel);

        storage = new EntityWithRollers<>(20);

        for(int i = 0; i < 20; i++) {
            if (rnd.nextBoolean()) {
                storage.add(new EntityTrackedVehicle(
                        rnd.nextInt(100, 300),
                        rnd.nextInt(1000, 2000),
                        new Color(rnd.nextInt(0, 256), rnd.nextInt(0, 256), rnd.nextInt(0, 256)),
                        new Color(rnd.nextInt(0, 256), rnd.nextInt(0, 256), rnd.nextInt(0, 256)),
                        rnd.nextBoolean(),
                        rnd.nextBoolean()
                ));
            } else {
                storage.add(new EntityTracktor(
                        rnd.nextInt(100, 300),
                        rnd.nextInt(1000, 2000),
                        new Color(rnd.nextInt(0, 256), rnd.nextInt(0, 256), rnd.nextInt(0, 256))
                ));
            }
            storage.add(RollersType.random(rnd.nextInt(4, 7), new Color(rnd.nextInt(0, 256), rnd.nextInt(0, 256), rnd.nextInt(0, 256))));
        }

        buttonRefresh.addActionListener(e -> {
            first = storage.constructTracktor();
            second = storage.constructTracktor();
            third = storage.constructTracktor();

            first.setObject(0, 10, pictureBox.getWidth(), pictureBox.getHeight());
            second.setObject(150, 10, pictureBox.getWidth(), pictureBox.getHeight());
            third.setObject(300, 10, pictureBox.getWidth(), pictureBox.getHeight());

            repaint();
        });
    }

    @Override
    public void paint(Graphics g) {
        super.paint(g);
        Graphics2D g2g = (Graphics2D) pictureBox.getGraphics();

        if (first != null && second != null && third != null) {
            first.drawningObject(g2g);
            second.drawningObject(g2g);
            third.drawningObject(g2g);
        }
    }
}