svetls

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

public class Svetluska extends JComponent implements MouseListener {

    Timer timer;
    protected int seconds = 1;
    protected int stav;
    protected boolean broken = false;
    protected boolean let = false;
    int rychlost = 2;
    int posx;
    int posy;
    private javax.swing.JFrame mojKontajner;
    public Color color = Color.green;

    public Svetluska() {

        addMouseListener(this);
        setBounds(125, 50, 50, 50);
        timer = new Timer(100, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (seconds % 2 == 1) {
                    stav = 1;
                } else {
                    stav = 2;
                }
                int x = (int) (Math.random() * 2);
                int y = (int) (Math.random() * 2);

                if (x == 1 && y == 1) {
                    posx = getX() + rychlost;
                    posy = getY() - rychlost;
                } else if (x == 0 && y == 1) {
                    posx = getX() - rychlost;
                    posy = getY() + rychlost;
                } else if (x == 1 && y == 0) {
                    posx = getX() + rychlost;
                    posy = getY() + rychlost;
                } else if (x == 0 && y == 0) {
                    posx = getX() - rychlost;
                    posy = getY() - rychlost;
                }
                if (posx > 0 && posx < 300 && posy > 0 && posy < 300) {
                    setBounds(posx, posy, 30, 30);
                } else {
                    setBounds(getX(), getY(), 30, 30);
                }
                repaint();
                seconds++;

            }
        });
        timer.start();
    }

    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.setColor(Color.black);
        g.fillRect(0, 0, 10, 20);
        g.setColor(Color.black);
        g.fillOval(0, 18, 10, 10);
        if (broken) {
            if (stav == 1) {
                g.setColor(Color.yellow);
                g.fillRect(0, 0, 10, 20);
                g.setColor(Color.yellow);
                g.fillOval(0, 18, 10, 10);
            } else {
                g.setColor(Color.black);
                g.fillRect(0, 0, 10, 20);
                g.setColor(Color.black);
                g.fillOval(0, 18, 10, 10);
            }
        } else if (let) {
            if (stav == 1) {
                g.setColor(Color.yellow);
                g.fillRect(0, 0, 10, 20);
                g.setColor(Color.black);
                g.fillOval(0, 18, 10, 10);
            } else {
                g.setColor(color);
                g.fillRect(0, 0, 10, 20);
                g.setColor(color);
                g.fillOval(0, 18, 10, 10);
            }
        } else {
            if (stav == 1) {
                g.setColor(Color.yellow);
                g.fillRect(0, 0, 10, 20);
                g.setColor(Color.black);
                g.fillOval(0, 18, 10, 10);
            } else {
                g.setColor(Color.black);
                g.fillRect(0, 0, 10, 20);
                g.setColor(Color.black);
                g.fillOval(0, 18, 10, 10);
            }
        }

    }

    @Override
    public void mouseClicked(MouseEvent e) {
        if (e.getButton() == MouseEvent.BUTTON1) {
            if (!broken) {
                broken = true;
                repaint();
            } else {
                broken = false;
                repaint();
            }
        } else if (e.getButton() == MouseEvent.BUTTON3) {
            timer.stop();
            setBounds(0, 0, 0, 0);
        }
    }

    @Override
    public void mousePressed(MouseEvent e) {
    }

    @Override
    public void mouseReleased(MouseEvent e) {
    }

    @Override
    public void mouseEntered(MouseEvent e) {
        let = true;
    }

    @Override
    public void mouseExited(MouseEvent e) {
        let = false;
    }

}