力扣——TinyURL的加密与解密

public class Codec {

 // Encodes a URL to a shortened URL.
    public static String encode(String longUrl) {
        char[] charArray = longUrl.toCharArray();
        char[] charResult = new char[charArray.length];
        int i = 0;
        for (char a : charArray) {
            charResult[i] = (char)(a^1);
            i++;
        }
        return new String(charResult);
    }

    // Decodes a shortened URL to its original URL.
    public  static String decode(String shortUrl) {
        return encode(shortUrl);
    }
}

// Your Codec object will be instantiated and called as such:
// Codec codec = new Codec();
// codec.decode(codec.encode(url));