TinyURL is a URL shortening service where you enter a URL such ashttps://leetcode.com/problems/design-tinyurland it returns a short URL such ashttp://tinyurl.com/4e9iAk.

Design theencodeanddecodemethods for the TinyURL service. There is no restriction on how your encode/decode algorithm should work. You just need to ensure that a URL can be encoded to a tiny URL and the tiny URL can be decoded to the original URL.

public class Codec {

    Map<Integer, String> hash = new HashMap<>();
    // Encodes a URL to a shortened URL.
    public String encode(String longUrl) {
        hash.put(longUrl.hashCode(), longUrl);

        return "http://tinyurl.com/" + longUrl.hashCode();
    }

    // Decodes a shortened URL to its original URL.
    public String decode(String shortUrl) {
        return hash.get(Integer.parseInt(shortUrl.replace("http://tinyurl.com/", "")));
    }
}

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