P529-P547 《Head First Java》20201030读书笔记 第16章 集合与泛型 Java集合框架(Collections Framework)能够支持绝大多数你会用到的数据结构。 泛型意味着更好的类型安全性 运用泛型你就可以创建类型安全更好的集合,让问题尽可能在编译期就能抓到,而不会等到执行期才冒出来。 如果没有
The sequential Java-style iterator requires two separate function calls in order to retrieve an element: the first (hasNext) to check if any element exists, while the second (next) actually retrieves it. Multiple calls to hasNext may return true to more than one thread, 3 when in fact ...
So in principle also .currentTimeMillis (well that's defined in Java anyway - but do we really need an exception for "exception of System interrupts" as Martin mentions above?) Member lrytz commented May 11, 2018 It leads to the question what is a side effect. Referential transparency is...