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

public class Transform2158{

    public static String convertBase(String input, int fromBase, int toBase) {
        try {
            int number = Integer.parseInt(input, fromBase);
            return Integer.toString(number, toBase);
        } catch (NumberFormatException e) {
            return null;
        }
    }

    public static boolean isValidBase(int base) {
        return base == 2 || base == 8 || base == 10 || base == 16;
    }

    public static void main(String[] args) {
        if (args.length > 0 && args[0].equals("cli")) {
            runCLI();
        } else {
            SwingUtilities.invokeLater(() -> new Transform2158().createAndShowGUI());
        }
    }

    private static void runCLI() {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入输入数字: ");
        String input = scanner.nextLine();

        System.out.print("请输入从进制 (2, 8, 10, 16): ");
        int fromBase = scanner.nextInt();

        System.out.print("请输入到进制 (2, 8, 10, 16): ");
        int toBase = scanner.nextInt();

        if (isValidBase(fromBase) && isValidBase(toBase)) {
            String result = convertBase(input, fromBase, toBase);
            if (result != null) {
                System.out.println("转换结果: " + result);
            } else {
                System.out.println("输入的数字在指定的进制中无效。");
            }
        } else {
            System.out.println("无效的进制，请输入 (2, 8, 10, 16)。");
        }

        scanner.close();
    }

    private void createAndShowGUI() {
        JFrame frame = new JFrame("进制转换器");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);
        frame.setLayout(null);

        JButton button = new JButton("开始转换");
        button.setBounds(80, 70, 140, 30);
        button.addActionListener(new ConvertAction());
        frame.add(button);

        frame.setVisible(true);
    }

    private static class ConvertAction implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            String input = JOptionPane.showInputDialog("请输入输入数字:");
            if (input == null) return;

            String fromBaseStr = JOptionPane.showInputDialog("请输入从进制 (2, 8, 10, 16):");
            if (fromBaseStr == null) return;

            String toBaseStr = JOptionPane.showInputDialog("请输入到进制 (2, 8, 10, 16):");
            if (toBaseStr == null) return;

            try {
                int fromBase = Integer.parseInt(fromBaseStr);
                int toBase = Integer.parseInt(toBaseStr);

                if (isValidBase(fromBase) && isValidBase(toBase)) {
                    String result = convertBase(input, fromBase, toBase);
                    if (result != null) {
                        JOptionPane.showMessageDialog(null, "转换结果: " + result);
                    } else {
                        JOptionPane.showMessageDialog(null, "输入的数字在指定的进制中无效。");
                    }
                } else {
                    JOptionPane.showMessageDialog(null, "无效的进制，请输入 (2, 8, 10, 16)。");
                }
            } catch (NumberFormatException ex) {
                JOptionPane.showMessageDialog(null, "输入的数字在指定的进制中无效。");
            }
        }
    }
}