package zadanie;

import java.awt.Canvas;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;

class Ekran extends Canvas {

    public String s = "Witam";
    private Font f;

    Ekran() {
        super();
        f = new Font("Times New Roman", Font.BOLD, 20);
        setFont(f);
        addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent ke) {
                s = ke.paramString();
                repaint();
            }
        });
        addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent me) {
                s = me.paramString();
                repaint();
            }
        });
    }

    public void paint(Graphics g) {
        g.drawString(s, 20, 220);
    }
}

public class Zadanie extends JFrame {

    public static JPanel panel, paneldwa;
    public static JComboBox kombobox;
    Ekran kanwasik;

    Zadanie() {
        super();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(1000, 1000);
        setVisible(true);
        panel = new JPanel();
        paneldwa = new JPanel();
        Ekran kanvasik = new Ekran();

        kombobox = new JComboBox();
        kombobox.addItem("1");
        kombobox.addItem("2");
        kombobox.addItem("3");
        kombobox.addItem("4");
        add(kombobox);
        panel.add(kombobox);
        paneldwa.add(kanwasik);


    }

    public static void main(String[] args) {
        Zadanie adam = new Zadanie();

        adam.add(panel);
         adam.add(paneldwa);
    }

}