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48 lines
1.4 KiB
48 lines
1.4 KiB
import javax.swing.*;
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import java.awt.*;
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public class SimpleCalculator extends JFrame {
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private JTextField display;
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private JPanel panel;
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private double operand1 = 0;
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private double operand2 = 0;
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private char operator;
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private boolean userIsTypingSecondNumber = false;
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public SimpleCalculator() {
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setTitle("Simple Calculator");
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setSize(400, 500);
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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setLocationRelativeTo(null);
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// Display text field
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display = new JTextField();
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display.setEditable(false);
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display.setHorizontalAlignment(SwingConstants.RIGHT);
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add(display, BorderLayout.NORTH);
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// Panel for buttons
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panel = new JPanel();
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panel.setLayout(new GridLayout(5, 4, 10, 10));
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// Add numbers and operations to panel
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String[] buttons = {
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"7", "8", "9", "/",
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"4", "5", "6", "*",
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"1", "2", "3", "-",
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"0", ".", "=", "+",
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"C"
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};
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for (String text : buttons) {
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JButton button = new JButton(text);
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button.setFont(new Font("Verdana", Font.PLAIN, 24));
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button.setFocusable(false);
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panel.add(button);
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button.addActionListener(new ButtonClickListener());
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}
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add(panel, BorderLayout.CENTER);
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} |