引入变量。(Windows下按Ctrl+Alt+V, OSX下按Cmd+Alt+V)

假设调用service。listallpersons()方法 按Ctrl+Alt+V并回车，方法调用的返回值的变量被插入:

List<Person> list = service.listAllPersons();

节省输入，并且不必检查所调用方法的返回类型。在使用泛型时尤其有用，例如:

new ArrayList<String>()

(引入变量)

ArrayList<String> stringArrayList = new ArrayList<String>();

(当然，你可以在按Enter键之前轻松更改变量的名称)

Idea 8.0有可爱的ctrl+shift+space x 2，可以完成以下自动完成:

 City city = customer.<ctrl-shift-space twice>

解析为

 City city = customer.getAddress().getCity();

通过任何级别的getter /setter。

IntelliJ调试器有一个非常方便的特性，叫做“表达式计算”，这比eclipses pendant好得多。它有完整的代码完成，我认为它通常“更有用”。

有一件事IntelliJ做得比Eclipse好得多，那就是清空你的口袋!

然而，我确实更喜欢使用它，它比Eclipse有一个很大的优势，就是它与文件系统同步的方式，对于大项目和慢速的计算机(是的，在工作环境中，PC的速度比我们家里的慢得多)，Eclipse似乎与IntelliJ相比似乎更快，尽管初始索引时间较慢。

IntelliJ社区版显然可以免费使用它，但你很快就会想要那些额外的重构和CC版不包含的小东西。

在我看来，这通常是一个更好的用户体验，但是否值得这个成本是每个开发者自己要回答的问题。

但是让我们感激我们现在有三个很棒的Java ide, NetBeans一直在变得更好。

有很多事情是idea用更简单的方法解决的，或者没有等价的方法:

Autocomplete actions: Doing ctrl+shift+a you can call any idea action from the keyboard without remembering its key combination... Think about gnome-do or launchy in windows, and you've got the idea! Also, this feature supports CamelCasing abbreviations ;) Shelf: Lets you keep easily some pieces of code apart, and then review them through the diff viewer. Local history: It's far better managed, and simpler. SVN annotations and history: simpler to inspect, and also you can easily see the history only for such a part of a whole source file. Autocomplete everywhere, such as the evaluate expression and breakpoint condition windows. Maven integration... much, much simpler, and well integrated. Refactors much closer to the hand, such as loops insertion, wrapping/casting, renaming, and add variables. Find much powerful and well organized. Even in big projects Much stable to work with several branches of a big project at the same time (as a former bugfixer of 1.5Gb by branch sources, and the need to working in them simultaneously, idea shown its rock-solid capabilities) Cleaner and simpler interface... And, simpler to use only with the keyboard, letting apart the need of using the mouse for lots of simple taks, saving you time and giving you more focus on the code... where it matters!

现在，作为开源的…Idea的用户群将呈指数级增长。

IntelliJ具有从代码到jspx文档的智能感知和重构支持。