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package calcapp;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class Okno extends JFrame {
    // конструктор класса
    public Okno() {
        setTitle("Калькулятор");
        setBounds(10, 10, 800, 600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        // add main panel
        getContentPane().add(createPanel());
        setVisible(true);
    }
    //
    public JPanel createPanel() {
        JPanel p = new JPanel();

        return p;
    }
}