java复杂有界面的计算器程序代码

以下是一个Java Swing复杂有界面的计算器程序代码示例：

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

public class Calculator extends JFrame implements ActionListener {

    private static final long serialVersionUID = 1L;
    private JTextField textField;
    private JButton button0, button1, button2, button3, button4, button5, button6, button7, button8, button9;
    private JButton buttonAdd, buttonSubtract, buttonMultiply, buttonDivide, buttonEqual, buttonClear;

    private double num1 = 0.0, num2 = 0.0;
    private char operation = ' ';

    public Calculator() {
        // Set up the frame
        setTitle("Calculator");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setResizable(false);

        // Set up the text field
        textField = new JTextField(16);
        textField.setEditable(false);
        Font font = new Font("Arial", Font.PLAIN, 20);
        textField.setFont(font);

        // Set up the buttons
        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("+");
        buttonSubtract = new JButton("-");
        buttonMultiply = new JButton("*");
        buttonDivide = new JButton("/");
        buttonEqual = new JButton("=");
        buttonClear = new JButton("C");

        // Set up the button panel
        JPanel buttonPanel = new JPanel(new GridLayout(4, 4, 5, 5));
        buttonPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        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(buttonSubtract);
        buttonPanel.add(button0);
        buttonPanel.add(buttonClear);
        buttonPanel.add(buttonEqual);
        buttonPanel.add(buttonAdd);

        // Add components to the frame
        setLayout(new BorderLayout(10, 10));
        add(textField, BorderLayout.NORTH);
        add(buttonPanel, BorderLayout.CENTER);

        // Add action listeners to buttons
        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);
        buttonSubtract.addActionListener(this);
        buttonMultiply.addActionListener(this);
        buttonDivide.addActionListener(this);
        buttonEqual.addActionListener(this);
        buttonClear.addActionListener(this);
    }

    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());
            operation = '+';
            textField.setText("");
        }
        else if(e.getSource() == buttonSubtract) {
            num1 = Double.parseDouble(textField.getText());
            operation = '-';
            textField.setText("");
        }
        else if(e.getSource() == buttonMultiply) {
            num1 = Double.parseDouble(textField.getText());
            operation = '*';
            textField.setText("");
        }
        else if(e.getSource() == buttonDivide) {
            num1 = Double.parseDouble(textField.getText());
            operation = '/';
            textField.setText("");
        }
        else if(e.getSource() == buttonEqual) {
            num2 = Double.parseDouble(textField.getText());
            switch(operation) {
                case '+':
                    textField.setText(Double.toString(num1 + num2));
                    break;
                case '-':
                    textField.setText(Double.toString(num1 - num2));
                    break;
                case '*':
                    textField.setText(Double.toString(num1 * num2));
                    break;
                case '/':
                    textField.setText(Double.toString(num1 / num2));
                    break;
            }
        }
        else if(e.getSource() == buttonClear) {
            textField.setText("");
        }
    }

    public static void main(String[] args) {
        Calculator calculator = new Calculator();
        calculator.pack();
        calculator.setLocationRelativeTo(null);
        calculator.setVisible(true);
    }
}

这个程序使用了Java Swing库来构建GUI界面，并实现了基本的加、减、乘、除和清除操作。用户可以通过点击按钮来输入数字和运算符，并在文本框中查看结果。