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Groovy Goodness: Check if a String Only Contains Whitespaces

· Java Zone

What every Java engineer should know about microservices: Reactive Microservices Architecture.  Brought to you in partnership with Lightbend.

In Groovy we can check if a String value only contains whitespaces with the isAllWhitespace() method. The method checks for spaces, but also takes into account tab and newline characters as whitespace.

assert ''.allWhitespace
assert '  '.allWhitespace
assert '\t '.allWhitespace
assert ' \r\n '.allWhitespace

assert !'mrhaki'.allWhitespace

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Published at DZone with permission of Hubert Klein Ikkink, DZone MVB. See the original article here.

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