How do I select individual words of a camelized word in IntelliJ IDEA

Yes, the answer of yalestar is correct. Settings > Editor > Smart keys > Use "CamelHumps" words

However, here is something that can be usefull to know: If you want to be able to select the whole word by double-click on it, unselect the "Honor 'CamelHumps' words settings when selecting on double click" in Settings > Editor.

IDEA has the same keystrokes as Eclipse for camel-case words, but you have to have the CamelHumps option turned on (it's in Settings -> Editor -> General -> Smart Keys -> Use "CamelHumps" words )