public class Codec {

private Map<Integer, String> map = new HashMap<>();

private String host = "http://tinyurl.com/";

// Encodes a URL to a shortened URL.

public String encode(String longUrl) {

int hashKey = longUrl.hashCode();

map.put(hashKey, longUrl);

return host+hashKey;

}

// Decodes a shortened URL to its original URL.

public String decode(String shortUrl) {

int hashKey = Integer.parseInt(shortUrl.replace(host,""));

return map.get(hashKey);

}

}

// Your Codec object will be instantiated and called as such:

// Codec codec = new Codec();

// codec.decode(codec.encode(url));