Question

I’m trying to call a methond on a Java class from a Groovy class. The Java method has a String array as a parameter, and I have a collection of Strings in my Groovy class. How do I convert the Groovy collection to a Java String array?

Java Method:

public class SomeJavaClass{   public void helpDoSomething(String[] stuff){    } } 

Groovy code

class SomeGroovyClass {   def data = ['a', 'b', 'c']    def doSomething = {     def javaClass = new SomeJavaClass()     javaClass(data) //Groovy passes ArrayList, Java class expects String[] ???   } } 

Answer 1

To be correct, def data = ['a','b','c'] it is a List, not an array.

Just try casting like this:

def data = ['a','b','c'] as String[]