[yiransheng]

In this case, I think Java's lack of tuples adds quite a bit of syntactic noise, a similar version in rust (another language with method chaining based iterators):

    let generated: Vec<i32> = 
        itertools::iterate((0, 1), |&(a, b)| (b, a + b))
            .map(|s| s.0)
            .take(10)
            .collect();

Arguably, this is closer to the matrix form of Fibonacci series[1]. In addition, the same code structure can generalize to any series with a recursive definition in the form of: a_n = f(a_{n-1}, a_{n-2}, ..., a_{n-k}) - which by some standard expresses intent better. Especially, for some k, the mental overhead of a loop version is too much to bare :)

[1] https://wikimedia.org/api/rest_v1/media/math/render/svg/c795...