import java.util.Scanner;

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

public class BaseConversionGUI extends JFrame implements ActionListener {

    private JTextField inputField;
    private JTextField fromBaseField;
    private JTextField toBaseField;
    private JLabel resultLabel;

    public BaseConversionGUI() {
        setTitle("进制转换器");
        setSize(400, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null); // 居中显示窗口

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(4, 2));

        panel.add(new JLabel("请输入要转换的数字: "));
        inputField = new JTextField();
        panel.add(inputField);

        panel.add(new JLabel("请输入源进制 (2-16): "));
        fromBaseField = new JTextField();
        panel.add(fromBaseField);

        panel.add(new JLabel("请输入目标进制 (2-16): "));
        toBaseField = new JTextField();
        panel.add(toBaseField);

        JButton convertButton = new JButton("转换");
        convertButton.addActionListener(this);
        panel.add(convertButton);

        resultLabel = new JLabel();
        panel.add(resultLabel);

        add(panel);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        String numStr = inputField.getText();
        int fromBase = Integer.parseInt(fromBaseField.getText());
        int toBase = Integer.parseInt(toBaseField.getText());

        if (fromBase < 2 || fromBase > 16 || toBase < 2 || toBase > 16) {
            JOptionPane.showMessageDialog(this, "进制必须在 2 到 16 之间。", "错误", JOptionPane.ERROR_MESSAGE);
        } else {
            String result = convertBase(numStr, fromBase, toBase);
            resultLabel.setText(numStr + " 从 " + fromBase + " 进制转换到 " + toBase + " 进制的结果是: " + result);
        }
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            BaseConversionGUI gui = new BaseConversionGUI();
            gui.setVisible(true);
        });
    }

    // 原有的转换方法保持不变
    public static String convertBase(String numStr, int fromBase, int toBase) {
        int decimalNumber = convertToDecimal(numStr, fromBase);
        return convertFromDecimal(decimalNumber, toBase);
    }

    public static int convertToDecimal(String numStr, int base) {
        return Integer.parseInt(numStr, base);
    }

    public static String convertFromDecimal(int num, int base) {
        if (num == 0) {
            return "0";
        }
        StringBuilder result = new StringBuilder();
        while (num > 0) {
            int remainder = num % base;
            if (remainder < 10) {
                result.append(remainder);
            } else {
                result.append((char) ('A' + (remainder - 10)));
            }
            num /= base;
        }
        return result.reverse().toString();
    }
}