使用Java编写一个简易计算器的GUI界面

抱歉，作为AI语言模型，我无法提供完整的Java代码。但是，以下是一个简单的Java计算器GUI界面的示例代码，可以帮助您开始编写自己的代码：

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

public class CalculatorGUI extends JFrame implements ActionListener {
    private JTextField textField;

    private JButton button0;
    private JButton button1;
    private JButton button2;
    private JButton button3;
    private JButton button4;
    private JButton button5;
    private JButton button6;
    private JButton button7;
    private JButton button8;
    private JButton button9;
    private JButton buttonAdd;
    private JButton buttonMinus;
    private JButton buttonMultiply;
    private JButton buttonDivide;
    private JButton buttonEqual;
    private JButton buttonClear;

    private double num1 = 0;
    private double num2 = 0;
    private String operator = "";

    public CalculatorGUI() {
        setTitle("Calculator");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setSize(300, 400);
        setResizable(false);

        JPanel panel = new JPanel(new BorderLayout());
        textField = new JTextField();
        textField.setEditable(false);
        textField.setHorizontalAlignment(JTextField.RIGHT);
        panel.add(textField, BorderLayout.NORTH);

        JPanel buttonPanel = new JPanel(new GridLayout(4, 4));
        button0 = new JButton("0");
        button1 = new JButton("1");
        button2 = new JButton("2");
        button3 = new JButton("3");
        button4 = new JButton("4");
        button5 = new JButton("5");
        button6 = new JButton("6");
        button7 = new JButton("7");
        button8 = new JButton("8");
        button9 = new JButton("9");
        buttonAdd = new JButton("+");
        buttonMinus = new JButton("-");
        buttonMultiply = new JButton("*");
        buttonDivide = new JButton("/");
        buttonEqual = new JButton("=");
        buttonClear = new JButton("C");

        button0.addActionListener(this);
        button1.addActionListener(this);
        button2.addActionListener(this);
        button3.addActionListener(this);
        button4.addActionListener(this);
        button5.addActionListener(this);
        button6.addActionListener(this);
        button7.addActionListener(this);
        button8.addActionListener(this);
        button9.addActionListener(this);
        buttonAdd.addActionListener(this);
        buttonMinus.addActionListener(this);
        buttonMultiply.addActionListener(this);
        buttonDivide.addActionListener(this);
        buttonEqual.addActionListener(this);
        buttonClear.addActionListener(this);

        buttonPanel.add(button7);
        buttonPanel.add(button8);
        buttonPanel.add(button9);
        buttonPanel.add(buttonDivide);
        buttonPanel.add(button4);
        buttonPanel.add(button5);
        buttonPanel.add(button6);
        buttonPanel.add(buttonMultiply);
        buttonPanel.add(button1);
        buttonPanel.add(button2);
        buttonPanel.add(button3);
        buttonPanel.add(buttonMinus);
        buttonPanel.add(button0);
        buttonPanel.add(buttonClear);
        buttonPanel.add(buttonEqual);
        buttonPanel.add(buttonAdd);

        panel.add(buttonPanel, BorderLayout.CENTER);

        add(panel);
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == button0) {
            textField.setText(textField.getText() + "0");
        } else if (e.getSource() == button1) {
            textField.setText(textField.getText() + "1");
        } else if (e.getSource() == button2) {
            textField.setText(textField.getText() + "2");
        } else if (e.getSource() == button3) {
            textField.setText(textField.getText() + "3");
        } else if (e.getSource() == button4) {
            textField.setText(textField.getText() + "4");
        } else if (e.getSource() == button5) {
            textField.setText(textField.getText() + "5");
        } else if (e.getSource() == button6) {
            textField.setText(textField.getText() + "6");
        } else if (e.getSource() == button7) {
            textField.setText(textField.getText() + "7");
        } else if (e.getSource() == button8) {
            textField.setText(textField.getText() + "8");
        } else if (e.getSource() == button9) {
            textField.setText(textField.getText() + "9");
        } else if (e.getSource() == buttonAdd) {
            num1 = Double.parseDouble(textField.getText());
            operator = "+";
            textField.setText("");
        } else if (e.getSource() == buttonMinus) {
            num1 = Double.parseDouble(textField.getText());
            operator = "-";
            textField.setText("");
        } else if (e.getSource() == buttonMultiply) {
            num1 = Double.parseDouble(textField.getText());
            operator = "*";
            textField.setText("");
        } else if (e.getSource() == buttonDivide) {
            num1 = Double.parseDouble(textField.getText());
            operator = "/";
            textField.setText("");
        } else if (e.getSource() == buttonEqual) {
            num2 = Double.parseDouble(textField.getText());
            if (operator.equals("+")) {
                textField.setText("" + (num1 + num2));
            } else if (operator.equals("-")) {
                textField.setText("" + (num1 - num2));
            } else if (operator.equals("*")) {
                textField.setText("" + (num1 * num2));
            } else if (operator.equals("/")) {
                textField.setText("" + (num1 / num2));
            }
        } else if (e.getSource() == buttonClear) {
            textField.setText("");
            num1 = 0;
            num2 = 0;
            operator = "";
        }
    }

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

这个代码创建了一个简单的计算器GUI界面，它包含数字按钮、加减乘除按钮、等号按钮和清除按钮。当用户按下数字按钮时，它们将被添加到文本字段中。当用户按下加减乘除按钮时，程序会记录第一个数字并记录操作符。当用户按下等号按钮时，程序会记录第二个数字并使用之前记录的操作符执行计算。当用户按下清除按钮时，文本字段将被清空，所有数字和操作符变量也将被重置。