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Calculator.java

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+import java.util.Scanner;
+
+public class Calculator {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("请输入要转换的数：");
+        String num = scanner.nextLine();
+
+        System.out.print("请输入源进制(2-16)：");
+        int fromBase = scanner.nextInt();
+
+        System.out.print("请输入目标进制(2-16)：");
+        int toBase = scanner.nextInt();
+
+        // 调用转换方法
+        String converted = convertBase(num, fromBase, toBase);
+
+        System.out.printf("%s (base %d) 转换为 base %d 是 %s%n", num, fromBase, toBase, converted);
+    }
+
+    public static String convertBase(String num, int fromBase, int toBase) {
+        // 将给定的fromBase进制数转换为十进制数
+        int decimalNum = Integer.parseInt(num, fromBase);
+
+        // 定义字符集以表示大于10的进制数
+        char[] digits = "0123456789ABCDEF".toCharArray();
+
+        // 如果目标进制是10，则直接返回decimalNum
+        if (toBase == 10) {
+            return String.valueOf(decimalNum);
+        }
+
+        // 否则，从十进制转换为目标进制
+        StringBuilder result = new StringBuilder();
+        while (decimalNum > 0) {
+            int remainder = decimalNum % toBase;
+            result.insert(0, digits[remainder]);
+            decimalNum /= toBase;
+        }
+
+        return result.toString();
+    }
+}