A modern programming language that makes developers happier.

kotlinlang

call.enqueue(new Callback&lt;List&lt;Task&gt;&gt;() {  
    @Override
    public void onResponse(Call&lt;List&lt;Task&gt;&gt; call, Response&lt;List&lt;Task&gt;&gt; response) {
        if (response.isSuccessful()) {
            // tasks available
        } else {
            // error response, no access to resource?
        }
    }

    @Override
    public void onFailure(Call&lt;List&lt;Task&gt;&gt; call, Throwable t) {
        // something went completely south (like no internet connection)
        Log.d("Error", t.getMessage());
    }
}

Please use backticks for code, or even better use code snippets for big code samples