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Main.java

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+package java6257.lesson06;
+
+import javax.swing.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Main {
+
+    // 符号转化为数字
+    public static int getNum(char c) {
+        if (Character.isDigit(c)) {
+            return c - '0';
+        }
+        if ('a' <= c && c <= 'z') {
+            return c - 'a' + 10;
+        }
+        if ('A' <= c && c <= 'Z') {
+            return c - 'A' + 10;
+        }
+        return 0;
+    }
+
+    // 数字转化为符号
+    public static char getChar(int num) {
+        if (num >= 0 && num <= 9) {
+            return (char) (num + '0');
+        } else {
+            return (char) (num - 10 + 'A');
+        }
+    }
+
+    // 将字符串根据进制转化为数字
+    public static long toNum(String number, int base) {
+        int n = number.length();
+        long num = 0;
+        for (int i = 0; i < n; i++) {
+            char ch = number.charAt(i);
+            num *= base;
+            num += getNum(ch);
+        }
+        return num;
+    }
+
+    // 将数字根据进制转化为字符串
+    public static String toString(long num, int base) {
+        if (num == 0) return "0";
+
+        StringBuilder ans = new StringBuilder();
+        while (num > 0) {
+            ans.append(getChar((int) (num % base)));
+            num /= base;
+        }
+        ans.reverse();
+        return ans.toString();
+    }
+
+    // 执行进制转换
+    public static String convertBase(String num, int stBase, int enBase) {
+        return toString(toNum(num, stBase), enBase);
+    }
+
+    public static void main(String[] args) {
+        // 创建窗口
+        JFrame frame = new JFrame("进制转换器");
+        frame.setSize(400, 300);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setLayout(null);
+
+        // 源进制输入框
+        JLabel stBaseLabel = new JLabel("源进制（2-16）:");
+        stBaseLabel.setBounds(50, 20, 120, 25);
+        frame.add(stBaseLabel);
+
+        JTextField stBaseField = new JTextField();
+        stBaseField.setBounds(200, 20, 100, 25);
+        frame.add(stBaseField);
+
+        // 目标进制输入框
+        JLabel enBaseLabel = new JLabel("目标进制（2-16）:");
+        enBaseLabel.setBounds(50, 60, 120, 25);
+        frame.add(enBaseLabel);
+
+        JTextField enBaseField = new JTextField();
+        enBaseField.setBounds(200, 60, 100, 25);
+        frame.add(enBaseField);
+
+        // 源数字输入框
+        JLabel numberLabel = new JLabel("源数字:");
+        numberLabel.setBounds(50, 100, 120, 25);
+        frame.add(numberLabel);
+
+        JTextField numberField = new JTextField();
+        numberField.setBounds(200, 100, 100, 25);
+        frame.add(numberField);
+
+        // 目标数字显示框
+        JLabel resultLabel = new JLabel("转换后的数字:");
+        resultLabel.setBounds(50, 140, 120, 25);
+        frame.add(resultLabel);
+
+        JTextField resultField = new JTextField();
+        resultField.setBounds(200, 140, 100, 25);
+        resultField.setEditable(false);  // 只读
+        frame.add(resultField);
+
+        // 转换按钮
+        JButton convertButton = new JButton("转换");
+        convertButton.setBounds(150, 180, 100, 30);
+        frame.add(convertButton);
+
+        // 按钮监听事件
+        convertButton.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                try {
+                    // 获取输入的源进制、目标进制和数字
+                    int stBase = Integer.parseInt(stBaseField.getText());
+                    int enBase = Integer.parseInt(enBaseField.getText());
+                    String number = numberField.getText();
+
+                    // 检查进制范围
+                    if (stBase < 2 || stBase > 16 || enBase < 2 || enBase > 16) {
+                        JOptionPane.showMessageDialog(frame, "进制必须在 2 到 16 之间", "错误", JOptionPane.ERROR_MESSAGE);
+                        return;
+                    }
+
+                    // 进行转换
+                    String result = convertBase(number, stBase, enBase);
+                    resultField.setText(result);
+                } catch (NumberFormatException ex) {
+                    JOptionPane.showMessageDialog(frame, "请输入正确的数字格式", "错误", JOptionPane.ERROR_MESSAGE);
+                }
+            }
+        });
+
+        // 显示窗口
+        frame.setVisible(true);
+    }
+}