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

public class Main {

    public static void  main(String[] args){

        int width   = 300;
        int height  = 200;

// Main frame
        JFrame frame = new JFrame("Calculator");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.setMinimumSize(new Dimension(width, height));
        frame.setResizable(false);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);

// Main panel
        JPanel panel = new JPanel();
        frame.add(panel);

// Box 1
        Box box1;
        box1 = Box.createHorizontalBox();
        JLabel labelNumb1 = new JLabel("Number 1:");
        JTextField textField1 = new JTextField(5);
        textField1.setMinimumSize(textField1.getPreferredSize());

        JLabel labelNumb2 = new JLabel("Number 2:");
        JTextField textField2 = new JTextField(5);
        textField2.setMinimumSize(textField1.getPreferredSize());

        box1.add(Box.createHorizontalStrut(3));
        box1.add(labelNumb1);
        box1.add(Box.createHorizontalStrut(5));
        box1.add(textField1);
        box1.add(Box.createHorizontalStrut(15));
        box1.add(labelNumb2);
        box1.add(Box.createHorizontalStrut(5));
        box1.add(textField2);

// Box 2
        Box box2;
        box2 = Box.createHorizontalBox();
        JButton buttonPlus      = new JButton("plus");
        JButton buttonMinus     = new JButton("minus");
        JButton buttonMultiply  = new JButton("multiply");
        JButton buttonDivide    = new JButton("divide");

        box2.add(buttonPlus);
        box2.add(Box.createHorizontalStrut(2));
        box2.add(buttonMinus);
        box2.add(Box.createHorizontalStrut(2));
        box2.add(buttonMultiply);
        box2.add(Box.createHorizontalStrut(2));
        box2.add(buttonDivide);

// Box 3
        Box box3;
        box3 = Box.createHorizontalBox();

        JLabel labelRes = new JLabel("Result:");
        box3.add(labelRes);

        panel.add(box1);
        panel.add(box2);
        panel.add(box3);
    }
}