gui 设计的简单计算器 java_Java实现GUI计算器（完整版）

好的，我会尽力回答您的问题。下面是一个简单的Java GUI计算器的实现代码，您可以参考一下：

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

public class CalculatorGUI implements ActionListener {

    private JFrame frame;
    private JPanel panel;
    private JTextField textField;
    private JButton[] buttons;
    private String[] buttonLabels = {"7", "8", "9", "/", "4", "5", "6", "*", "1", "2", "3", "-", "0", ".", "=", "+"};
    private double num1, num2, result;
    private char operator;

    public CalculatorGUI() {
        frame = new JFrame("Calculator");
        panel = new JPanel();
        textField = new JTextField(20);
        buttons = new JButton[buttonLabels.length];
        num1 = 0.0;
        num2 = 0.0;
        result = 0.0;
        operator = ' ';

        textField.setEditable(false);
        textField.setHorizontalAlignment(JTextField.RIGHT);

        for (int i = 0; i < buttons.length; i++) {
            buttons[i] = new JButton(buttonLabels[i]);
            buttons[i].addActionListener(this);
            panel.add(buttons[i]);
        }

        panel.setLayout(new GridLayout(4, 4, 5, 5));
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 300);
        frame.add(textField, BorderLayout.NORTH);
        frame.add(panel, BorderLayout.CENTER);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        CalculatorGUI calculator = new CalculatorGUI();
    }

    public void actionPerformed(ActionEvent e) {
        for (int i = 0; i < buttons.length; i++) {
            if (e.getSource() == buttons[i]) {
                String buttonLabel = buttonLabels[i];

                if (buttonLabel.matches("[0-9.]")) {
                    if (operator == ' ') {
                        num1 = Double.parseDouble(textField.getText() + buttonLabel);
                        textField.setText(Double.toString(num1));
                    } else {
                        num2 = Double.parseDouble(textField.getText() + buttonLabel);
                        textField.setText(Double.toString(num2));
                    }
                } else if (buttonLabel.matches("[/*\\-+]")) {
                    operator = buttonLabel.charAt(0);
                } else if (buttonLabel.equals("=")) {
                    switch (operator) {
                        case '+':
                            result = num1 + num2;
                            break;
                        case '-':
                            result = num1 - num2;
                            break;
                        case '*':
                            result = num1 * num2;
                            break;
                        case '/':
                            result = num1 / num2;
                            break;
                    }
                    textField.setText(Double.toString(result));
                    num1 = result;
                    num2 = 0.0;
                    operator = ' ';
                } else if (buttonLabel.equals("C")) {
                    num1 = 0.0;
                    num2 = 0.0;
                    result = 0.0;
                    operator = ' ';
                    textField.setText("");
                }
                break;
            }
        }
    }
}

这个代码实现了一个基本的四则运算的计算器功能，界面简单，易于操作。您可以根据自己的需求进行修改和扩展。希望能对您有所帮助。