I tried in Eclipse to use org.apache.commons.lang.NotImplementedException
, though it seems from what I can see both from IntelliSense and the Package Explorer, that that namespace does not exist.
So I guess I must load some other package(do you call them libraries in java?) than those it loaded by default.
This is my current setup: (link dead)
Download the commons lang library and add it to your eclipse project library.
EDIT (2016/02) : it seems that nowadays the .jar files are not provided as is. You have to get the "binary" archive (e.g. "commons-lang3-3.4-bin.zip") from the same download page and extract it. The required jar files are inside the extracted folder.
To add the jar to your eclipse project library:
You need to add Apache commons jar file to the project. You can select the jar you want from here - http://commons.apache.org/downloads/index.html
for lang you need this - commons-lang-2.5.jar
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