Well, for me it's a thousand tiny things. Some of the macros, the GUI layout in general in Eclipse I find awful. I can't open multiple projects in different windows in Eclipse. I can open multiple projects, but then it's view based system swaps a bunch of things around on me when I switch files. IntelliJ's code inspections seem better. Its popup helpers to fix common issues is nice. Lots of simple usability things like the side bar where I can hover over a hot spot and it'll tell me every implementing subclass of a method or the method I'm implementing and from where.

每当我不得不使用Eclipse时，或者看到别人使用Eclipse时，他们似乎可以做我在IntelliJ中可以做的大部分事情，但它花费的时间更长，而且更笨重。

结构搜索和替换。

例如，搜索如下内容:

  System.out.println($string$ + $expr$);

其中$string$是一个文字，$expr$是my.package.and.Class类型的表达式，然后替换为:

  $expr$.inspect($string$);

如果你把光标放在一个方法上，然后按CTRL+SHIFT+I将弹出方法实现。如果方法是一个接口方法，那么你可以使用上下箭头来循环实现:

Map<String, Integer> m = ...
m.contains|Key("Wibble");

|的位置(例如)您的光标所在的位置。

多得多的重构。

我在IntelliJ中一直使用的东西是在我输入时重构。我用两种ide重写了打印输出的类(最初是在eclipse中编写的)，用IntelliJ编写相同的类比用eclipse少了大约40%的按键/鼠标点击。

除非Eclipse对不完整的代码段支持同样多的重构，否则我不会使用它。

以下是IntelliJ 8.0/8.1的特性列表[http://www.jetbrains.com/idea/features/index.html]

一个非常有用的特性是能够部分构建Maven反应堆项目，以便只包括您需要的部分。

To make this a little clearer, consider the case of a collection of WAR files with a lot of common resources (e.g. JavaScript, Spring config files etc) being shared between them using the overlay technique. If you are working on some web page (running in Jetty) and want to change some of the overlay code that is held in a separate module then you'd normally expect to have to stop Jetty, run the Maven build, start Jetty again and continue. This is the case with Eclipse and just about every other IDE I've worked with. Not so in IntelliJ. Using the project settings you can define which facet of which module you would like to be included in a background build. Consequently you end up with a process that appears seamless. You make a change to pretty much any code in the project and instantly it is available after you refresh the browser.

非常简洁，而且非常快。

我无法想象在没有它的情况下，在像YUI这样的东西中编写一个返回到DWR/SpringMVC的前端。