closures - Groovy compiler does not accept java 8 Lambdas

Question

As , we know , Groovy syntax accepts closures . Today also, Java 8 adds in its syntax closure .

However , When i write java8 closure in groovy file , i get an error like the following :

Person.findAll().stream().filter(e-> e.age > 20)

We get this error :

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script1.groovy: 7: unexpected token: -> @ line 7, column 39.
   Person.findAll().stream().filter(e-> e.controllerId > 0)
                                         ^

1 error

Nevertheless , the following works successully :

Person.findAll().stream()  

question from:https://stackoverflow.com/questions/23906748/groovy-compiler-does-not-accept-java-8-lambdas

Answer 1

Yeah, the Groovy parser does not accept Java 8 Lambdas (not closures).

You can use a closure in place of it (assuming you're on Groovy 2.3.*)

ie:

Person.findAll().stream().filter( { e -> e.age > 20 } )

edit:

Groovy 3.0+ will accept lambda format