535. Encode and Decode TinyURL

LeetCode

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public class Codec {
    Map<Integer,String> map=new HashMap<>();
    String host="http://tinyurl.com/";
    // Encodes a URL to a shortened URL.
    public String encode(String longUrl) {
        int key=longUrl.hashCode();
        map.put(key,longUrl);
        return host+key;
    }
    // Decodes a shortened URL to its original URL.
    public String decode(String shortUrl) {
        return map.get(Integer.valueOf(shortUrl.replace(host,"")));
    }
}
// Your Codec object will be instantiated and called as such:
// Codec codec = new Codec();
// codec.decode(codec.encode(url));