My calculator project U23ST1005

[Haya2deen]

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

public class SwingCalculator {
public static void main(String[] args) {
// Create frame
JFrame frame = new JFrame("Calculator");
frame.setSize(400, 600);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());

    // Create display panel
    JTextField display = new JTextField();
    display.setFont(new Font("Arial", Font.BOLD, 24));
    display.setHorizontalAlignment(SwingConstants.RIGHT);
    frame.add(display, BorderLayout.NORTH);

    // Create button panel
    JPanel panel = new JPanel();
    panel.setLayout(new GridLayout(4, 4, 10, 10));

    // Calculator buttons
    String[] buttons = {
            "7", "8", "9", "/",
            "4", "5", "6", "*",
            "1", "2", "3", "-",
            "C", "0", "=", "+"
    };

    for (String text : buttons) {
        JButton button = new JButton(text);
        button.setFont(new Font("Arial", Font.BOLD, 20));
        panel.add(button);
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String cmd = e.getActionCommand();
                if (cmd.equals("=")) {
                    try {
                        display.setText(evaluate(display.getText()));
                    } catch (Exception ex) {
                        display.setText("Error");
                    }
                } else if (cmd.equals("C")) {
                    display.setText("");
                } else {
                    display.setText(display.getText() + cmd);
                }
            }
        });
    }

    frame.add(panel, BorderLayout.CENTER);
    frame.setVisible(true);
}

// Method to evaluate expressions
private static String evaluate(String expression) {
    // Simple evaluation using ScriptEngine
    try {
        return String.valueOf(new javax.script.ScriptEngineManager()
                .getEngineByName("JavaScript").eval(expression));
    } catch (Exception e) {
        return "Error";
    }
}

}