import com.sun.deploy.panel.JHighDPITable;

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

public class Main extends JFrame implements ActionListener{
    JButton num1,
            num2,
            num3,
            num4,
            num5,
            num6,
            num7,
            num8,
            num9,
            num0,
            plus,
            minus,
            mnozenie,
            dzielnie,
            wynik,
            M1,
            M2,
            C,
            CE;
    JLabel book;
    double liczba1,
        liczba2,
        pamiec;
    int dzialanie = 0;

    String historia = new String("");

    void dodajZnak(String liczba)
    {
        String napis = book.getText();
        napis = napis + liczba;
        book.setText(napis);
    }
    public Main()
    {
        setSize( 600, 400);
        setTitle("Kalkulator arytmetyczny");
        setLayout(null);
        setResizable(false);

        book = new JLabel("");
        book.setBounds(150,40,292,50);
        add(book);

        num1 = new JButton("1");
        num1.setBounds(150,220,50,50);
        add(num1);
        num1.addActionListener(this);

        num2 = new JButton("2");
        num2.setBounds(210,220,50,50);
        add(num2);
        num2.addActionListener(this);

        num3 = new JButton("3");
        num3.setBounds(270,220,50,50);
        add(num3);
        num3.addActionListener(this);

        num4 = new JButton("4");
        num4.setBounds(150,160,50,50);
        add(num4);
        num4.addActionListener(this);

        num5 = new JButton("5");
        num5.setBounds(210,160,50,50);
        add(num5);
        num5.addActionListener(this);

        num6 = new JButton("6");
        num6.setBounds(270,160,50,50);
        add(num6);
        num6.addActionListener(this);

        num7 = new JButton("7");
        num7.setBounds(150,100,50,50);
        add(num7);
        num7.addActionListener(this);

        num8 = new JButton("8");
        num8.setBounds(210,100,50,50);
        add(num8);
        num8.addActionListener(this);

        num9 = new JButton("9");
        num9.setBounds(270,100,50,50);
        add(num9);
        num9.addActionListener(this);

        num0 = new JButton("0");
        num0.setBounds(150,280,110,50);
        add(num0);
        num0.addActionListener(this);

        plus = new JButton("+");
        plus.setBounds(270,280,50,50);
        add(plus);
        plus.addActionListener(this);

        mnozenie = new JButton("*");
        mnozenie.setBounds(330,100,50,50);
        add(mnozenie);
        mnozenie.addActionListener(this);

        dzielnie = new JButton("/");
        dzielnie.setBounds(330,160,50,50);
        add(dzielnie);
        dzielnie.addActionListener(this);

        minus = new JButton("-");
        minus.setBounds(330,220,50,50);
        add(minus);
        minus.addActionListener(this);

        wynik = new JButton("=");
        wynik.setBounds(330,280,50,50);
        add(wynik);
        wynik.addActionListener(this);

        M1 = new JButton("M+");
        M1.setBounds(390,100,51,50);
        add(M1);
        M1.addActionListener(this);

        M2 = new JButton("M-");
        M2.setBounds(390,160,51,50);
        add(M2);
        M2.addActionListener(this);

        C = new JButton("C");
        C.setBounds(390,220,51,50);
        add(C);
        C.addActionListener(this);

        CE = new JButton("CE");
        CE.setBounds(390,280,51,50);
        add(CE);
        CE.addActionListener(this);
    }
    public void actionPerformed(ActionEvent e)
    {
        Object event = e.getSource();
        if(event==num1)
        {
            dodajZnak("1");
        }else if(event==num2)
        {
            dodajZnak("2");
        }else if(event==num3)
        {
            dodajZnak("3");
        }else if(event==num4)
        {
            dodajZnak("4");
        }else if(event==num5)
        {
            dodajZnak("5");
        }else if(event==num6)
        {
            dodajZnak("6");
        }else if(event==num7)
        {
            dodajZnak("7");
        }else if(event==num8)
        {
            dodajZnak("8");
        }else if(event==num9)
        {
            dodajZnak("9");
        }else if(event==num0)
        {
            dodajZnak("0");
        }else if(event==plus)
        {
            liczba1 = Double.parseDouble(book.getText());
            book.setText("");
            dzialanie = 1;

        }else if(event==minus)
        {
            liczba1 = Double.parseDouble(book.getText());
            book.setText("");
            dzialanie = 2;
        }else if(event==mnozenie)
        {
            liczba1 = Double.parseDouble(book.getText());
            book.setText("");
            dzialanie = 3;
        }else if(event==dzielnie)
        {
            liczba1 = Double.parseDouble(book.getText());
            book.setText("");
            dzialanie = 4;
        }else if(event==wynik) {
            liczba2 = Double.parseDouble(book.getText());
            if (dzialanie == 1) {
                double is = liczba1 + liczba2;
                book.setText(String.valueOf(is));
            } else if (dzialanie == 2) {
                double is = liczba1 - liczba2;
                book.setText(String.valueOf(is));
            } else if (dzialanie == 3) {
                double is = liczba1 * liczba2;
                book.setText(String.valueOf(is));
            } else if (dzialanie == 4) {
                double is = liczba1 / liczba2;
                book.setText(String.valueOf(is));
            }
        }else if(event==M1)
        {
            double liczba = Double.parseDouble(book.getText());
            pamiec = liczba;
        }else if(event==M2)
        {
            book.setText(String.valueOf(pamiec));
        }else if(event==C)
        {
            book.setText("");
            dzialanie = 0;
        }else if(event==CE)
        {
            String napis = book.getText();
            napis = napis.substring(0,(napis.length()-1));
            book.setText(napis);
        }
    }
    public static void main(String[] args) {
    // write your code here
        Main window = new Main();
        window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        window.setVisible(true);
    }
}