import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
public class Main extends JFrame {
    JButton buttonDel, buttonDiv;
    JTextField screen;

    public Main(String title) throws HeadlessException {
        super(title);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(1920,1080);
        setLocationRelativeTo(null);
        setVisible(true);
        setLayout(new GridBagLayout());
        setPreferredSize(new Dimension(500,500));

        GridBagConstraints g = new GridBagConstraints();
        g.fill = GridBagConstraints.HORIZONTAL;
        buttonDel = new JButton("Del");
        buttonDiv = new JButton("/");
        screen = new JTextField();

        buttonDel.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                screen.setText(screen.getText() + "1");
            }
        });

        g.gridx = 0;
        g.gridy = 0;
        g.gridwidth = 1;
        g.gridheight = 1;
        g.fill = GridBagConstraints.BOTH;
        add(buttonDel, g);
        g.gridx = 1;
        add(buttonDiv, g);
        g.gridx = 0;
        g.gridy = 1;
        g.gridwidth = 2;
        add(screen, g);

    }

    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new Main("Kalkulačka");
            }
        });

    }
}