Obsługa zdarzeń myszy

Kody źródłowe z odcinka

package pl.am.swing.zdarzenia4;

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

public class MyFrame extends JFrame {

    public MyFrame() {
        setTitle("Zdarzenia myszy");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(1000, 600);

        add(new MyComponent());
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            MyFrame myFrame = new MyFrame();
            myFrame.setVisible(true);
        });

    }
}

package pl.am.swing.zdarzenia4;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

public class MyComponent extends JComponent {

    private int mouseX = 500;
    private int mouseY = 300;

    public MyComponent() {
        addMouseListener(new MouseAdapter() {
            @Override
            public void mouseReleased(MouseEvent e) {
                mouseX = e.getX();
                mouseY = e.getY();

                System.out.println("mouseX = " + mouseX);
                repaint();
            }
        });
    }

    @Override
    protected void paintComponent(Graphics g) {
        System.out.println("rysowanie");
        Graphics2D graphics2D = (Graphics2D) g;

        Point point = new Point(mouseX-100, mouseY-100);
        Dimension dimension = new Dimension(200, 200);

        Rectangle rectangle = new Rectangle(point, dimension);
        graphics2D.fill(rectangle);


    }
}