java GUI复数计算器

以下是一个Java实现的GUI复数计算器的例子：

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

public class ComplexCalculator extends JFrame implements ActionListener {
    private JTextField jtf1, jtf2, jtf3, jtf4;
    private JButton jb1, jb2, jb3, jb4;

    public ComplexCalculator() {
        super("复数计算器");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new GridLayout(3, 4));

        JLabel jl1 = new JLabel("实部1：");
        add(jl1);
        jtf1 = new JTextField(10);
        add(jtf1);

        JLabel jl2 = new JLabel("虚部1：");
        add(jl2);
        jtf2 = new JTextField(10);
        add(jtf2);

        JLabel jl3 = new JLabel("实部2：");
        add(jl3);
        jtf3 = new JTextField(10);
        add(jtf3);

        JLabel jl4 = new JLabel("虚部2：");
        add(jl4);
        jtf4 = new JTextField(10);
        add(jtf4);

        jb1 = new JButton("+");
        add(jb1);
        jb1.addActionListener(this);

        jb2 = new JButton("-");
        add(jb2);
        jb2.addActionListener(this);

        jb3 = new JButton("*");
        add(jb3);
        jb3.addActionListener(this);

        jb4 = new JButton("/");
        add(jb4);
        jb4.addActionListener(this);

        pack();
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        double a1 = Double.parseDouble(jtf1.getText());
        double b1 = Double.parseDouble(jtf2.getText());
        double a2 = Double.parseDouble(jtf3.getText());
        double b2 = Double.parseDouble(jtf4.getText());

        ComplexNumber x = new ComplexNumber(a1, b1);
        ComplexNumber y = new ComplexNumber(a2, b2);

        if (e.getSource() == jb1) {
            ComplexNumber z = x.add(y);
            JOptionPane.showMessageDialog(null, "结果为：" + z.toString());
        } else if (e.getSource() == jb2) {
            ComplexNumber z = x.subtract(y);
            JOptionPane.showMessageDialog(null, "结果为：" + z.toString());
        } else if (e.getSource() == jb3) {
            ComplexNumber z = x.multiply(y);
            JOptionPane.showMessageDialog(null, "结果为：" + z.toString());
        } else if (e.getSource() == jb4) {
            ComplexNumber z = x.divide(y);
            JOptionPane.showMessageDialog(null, "结果为：" + z.toString());
        }
    }

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

class ComplexNumber {
    private double real;
    private double imaginary;

    public ComplexNumber(double real, double imaginary) {
        this.real = real;
        this.imaginary = imaginary;
    }

    public ComplexNumber add(ComplexNumber other) {
        double real = this.real + other.real;
        double imaginary = this.imaginary + other.imaginary;
        return new ComplexNumber(real, imaginary);
    }

    public ComplexNumber subtract(ComplexNumber other) {
        double real = this.real - other.real;
        double imaginary = this.imaginary - other.imaginary;
        return new ComplexNumber(real, imaginary);
    }

    public ComplexNumber multiply(ComplexNumber other) {
        double real = this.real * other.real - this.imaginary * other.imaginary;
        double imaginary = this.real * other.imaginary + this.imaginary * other.real;
        return new ComplexNumber(real, imaginary);
    }

    public ComplexNumber divide(ComplexNumber other) {
        double denominator = other.real * other.real + other.imaginary * other.imaginary;
        double real = (this.real * other.real + this.imaginary * other.imaginary) / denominator;
        double imaginary = (this.imaginary * other.real - this.real * other.imaginary) / denominator;
        return new ComplexNumber(real, imaginary);
    }

    public String toString() {
        if (imaginary == 0) {
            return Double.toString(real);
        } else if (real == 0) {
            return Double.toString(imaginary) + "i";
        } else if (imaginary < 0) {
            return Double.toString(real) + "-" + Double.toString(-imaginary) + "i";
        } else {
            return Double.toString(real) + "+" + Double.toString(imaginary) + "i";
        }
    }
}