java gui 还贷计算器

Java GUI 还贷计算器是一个基于Java图形用户界（GUI）的应用程序，用于计算贷款的还款金额和利息。它提供了一个用户友好的界面，让用户可以输入贷款金额、年利率、还款期限等信息，然后计算出每月的还款金额和总利息。

实现Java GUI 还贷计算器的一种常见方式是使用Swing库。Swing是Java提供的一个GUI工具包，可以用于创建各种图形界面应用程序。

以下是实现Java GUI 还贷计算器的一般步骤：

1. 创建一个继承自JFrame的主窗口类，作为应用程序的主界面。
2. 在主窗口类中添加各种需要的组件，如标签、文本框、按钮等，用于接收用户输入和显示计算结果。
3. 为按钮添加事件监听器，当用户点击按钮时触发相应的计算逻辑。
4. 在事件监听器中获取用户输入的贷款金额、年利率、还款期限等信息，并进行相应的计算。
5. 将计算结果显示在界面上，如设置标签的文本内容或在文本框中显示。
6. 编译和运行程序，用户可以通过界面输入相关信息并进行计算。

这只是一个简单的示例，实际上还贷计算器可以根据需求进行更复杂的设计和功能扩展，如添加额外的选项、图表展示等。

相关问题

java gui 简易计算器

以下是一个Java Swing的GUI图形用户界面编程设计并编写的简易计算器程序，用户可以通过鼠标或键盘输入参加运算的数值和运算符，进行简单的四则运算：

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

    public Calculator() {
        super("Calculator");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new BorderLayout());
        textField = new JTextField();
        add(textField, BorderLayout.NORTH);
        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new GridLayout(4, 4));
        buttons = new JButton[buttonLabels.length];
        for (int i = 0; i < buttonLabels.length; i++) {
            buttons[i] = new JButton(buttonLabels[i]);
            buttons[i].addActionListener(this);
            buttonPanel.add(buttons[i]);
        }
        add(buttonPanel, BorderLayout.CENTER);
        pack();
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        String label = e.getActionCommand();
        if (label.equals("C")) {
            textField.setText("");
        } else if (label.equals("=")) {
            num2 = Double.parseDouble(textField.getText());
            if (operator.equals("+")) {
                result = num1 + num2;
            } else if (operator.equals("-")) {
                result = num1 - num2;
            } else if (operator.equals("*")) {
                result = num1 * num2;
            } else if (operator.equals("/")) {
                result = num1 / num2;
            }
            textField.setText(Double.toString(result));
        } else if (label.equals("+") || label.equals("-") || label.equals("*") || label.equals("/")) {
            num1 = Double.parseDouble(textField.getText());
            operator = label;
            textField.setText("");
        } else {
            textField.setText(textField.getText() + label);
        }
    }

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

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";
        }
    }
}