up vote22down votefavorite
4

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()
  
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Groovy is scheduled to accept Java's 8 syntax on version 3 – Will May 28 '14 at 12:14
    
That doesn't appear to be a question. – Jeff Scott Brown May 28 '14 at 23:26
up vote41down voteaccepted

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 2.6+ will accept lambda format