CODEWITHSUNDEEP
javagroovy
Jyo
Jyo

Reputation: 223

Can we use "Optional" to do null check in Groovy

I have very little knowledge on Groovy. I am using Groovy 2.4.12.

I would like to do null check on a variable which can be primitive or object. So I am trying to use Optional utility to do null check. I am getting Optional can not be resolved.

if(Optional.ofNullable(${value}).orElse(null) != null) {};

${value} will be mapped from java code.

Upvotes: 1

Views: 4346

Answers (1)

Alexander Pushkarev
Alexander Pushkarev

Reputation: 1145

Optional was introduced in Java 1.8 (https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html)

Groovy 2.4.12 uses Java 1.7 (here's the matric http://groovy-lang.org/download.html#requirements)

If you have Java 1.8+ installed, Groovy should be able to use Optional, provided it java.util.* or java.util.Optional was imported.

With the code sample you provided it is unclear what you're actually trying to accomplish, but, strictly speaking, Optional does not save you from checking for null, you just do it differently.

Upvotes: 2

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