eclipse - Java isEmpty() undefined for String?

Question

I'm working on a school project in eclipse, and when I try and use the isEmpty() method on a String, Eclipse shows up the following error:

The method isEmpty() is undefined for the type String

I've run the Java updates, but am still getting it. Is any reason why this method would be undefined?

Answer 1

String.isEmpty() was added in Java 6. In earlier versions you can use StringUtils.isEmpty(String) from Apache's commons-lang library.

To configure Eclipse to use the 1.6 JRE, go to Window->Preferences->Java->Installed JREs. If you haven't already got JAva 1.6 configured, select Add...,browse to your 1.6 installation and add it.

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