上传了初始文件BaseConverter.java“

BaseConverter.java

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+import java.util.Scanner;
+
+public class BaseConverter {
+
+    // 将任意进制数转换为十进制数  
+    public static long convertToDecimal(String number, int base) {
+        long decimal = 0;
+        int length = number.length();
+
+        for (int i = 0; i < length; i++) {
+            char digit = number.charAt(length - 1 - i);
+            int value;
+
+            if (digit >= '0' && digit <= '9') {
+                value = digit - '0';
+            } else if (digit >= 'A' && digit <= 'F') {
+                value = digit - 'A' + 10;
+            } else if (digit >= 'a' && digit <= 'f') {
+                value = digit - 'a' + 10;
+            } else {
+                throw new IllegalArgumentException("Invalid character in number: " + digit);
+            }
+
+            decimal += value * Math.pow(base, i);
+        }
+
+        return decimal;
+    }
+
+    // 将十进制数转换为任意进制数  
+    public static String convertToBase(long decimal, int base) {
+        if (base < 2 || base > 16) {
+            throw new IllegalArgumentException("Base must be between 2 and 16");
+        }
+
+        StringBuilder result = new StringBuilder();
+        char[] digits = "0123456789ABCDEF".toCharArray();
+
+        while (decimal > 0) {
+            int remainder = (int) (decimal % base);
+            result.insert(0, digits[remainder]);
+            decimal /= base;
+        }
+
+        if (result.length() == 0) {
+            result.append('0');
+        }
+
+        return result.toString();
+    }
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.print("Enter the number X: ");
+        String numberX = scanner.nextLine();
+
+        System.out.print("Enter the base of X (2-16): ");
+        int baseX = scanner.nextInt();
+
+        System.out.print("Enter the desired base Y (2-16): ");
+        int baseY = scanner.nextInt();
+
+        try {
+            long decimal = convertToDecimal(numberX, baseX);
+            String numberY = convertToBase(decimal, baseY);
+
+            System.out.println("The number " + numberX + " in base " + baseX + " is " + numberY + " in base " + baseY);
+        } catch (Exception e) {
+            System.err.println("Error: " + e.getMessage());
+        }
+
+        scanner.close();
+    }
+}