十进制数转换为十六进制字符串

Java代码

public static String toHexString(int num) {
        StringBuilder sb = new StringBuilder();
        do {
            int digit = num & 15;
            sb.append(digit > 9 ? (char)(digit - 10 + 'A') + "" : digit + "");
            num >>>= 4;
        } while(num != 0);
        return sb.reverse().toString();
    }