ADD file via upload

BaseConverter.java

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+package com.example.baseconverter;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Scanner;
+
+public class BaseConverter {
+
+    // 字符到数值的映射
+    private static final Map<Character, Integer> charToValueMap = new HashMap<>();
+    // 数值到字符的映射
+    private static final Map<Integer, Character> valueToCharMap = new HashMap<>();
+
+    static {
+        // 初始化字符到数值的映射
+        for (char c = '0'; c <= '9'; c++) {
+            charToValueMap.put(c, c - '0');
+        }
+        for (char c = 'A'; c <= 'F'; c++) {
+            charToValueMap.put(c, c - 'A' + 10);
+        }
+
+        // 初始化数值到字符的映射
+        for (int i = 0; i <= 9; i++) {
+            valueToCharMap.put(i, (char) ('0' + i));
+        }
+        for (int i = 10; i <= 15; i++) {
+            valueToCharMap.put(i, (char) ('A' + i - 10));
+        }
+    }
+
+    // 将任意进制的数转换为十进制
+    public static int toDecimal(String number, int base) {
+        int decimalValue = 0;
+        int power = 0;
+
+        for (int i = number.length() - 1; i >= 0; i--) {
+            char digit = number.charAt(i);
+            int value = charToValueMap.get(digit);
+            decimalValue += value * Math.pow(base, power);
+            power++;
+        }
+
+        return decimalValue;
+    }
+
+    // 将十进制数转换为任意进制
+    public static String fromDecimal(int decimalValue, int base) {
+        if (decimalValue == 0) {
+            return "0";
+        }
+
+        StringBuilder result = new StringBuilder();
+        while (decimalValue > 0) {
+            int remainder = decimalValue % base;
+            result.insert(0, valueToCharMap.get(remainder));
+            decimalValue /= base;
+        }
+
+        return result.toString();
+    }
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        // 输入原始进制和数
+        System.out.print("请输入原始进制 (2-16): ");
+        int sourceBase = scanner.nextInt();
+        System.out.print("请输入原始数: ");
+        String sourceNumber = scanner.next();
+
+        // 输入目标进制
+        System.out.print("请输入目标进制 (2-16): ");
+        int targetBase = scanner.nextInt();
+
+        // 验证输入
+        if (sourceBase < 2 || sourceBase > 16 || targetBase < 2 || targetBase > 16) {
+            System.out.println("进制必须在2到16之间！");
+            return;
+        }
+
+        // 转换
+        int decimalValue = toDecimal(sourceNumber, sourceBase);
+        String targetNumber = fromDecimal(decimalValue, targetBase);
+
+        // 输出结果
+        System.out.println("转换后的数是: " + targetNumber);
+    }
+}
+