How do I convert a Groovy String collection to a Java String Array?

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[] ???
  }
}

chanwit · Accepted Answer · 2009-02-20 18:32:38Z

115

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[]

answered Feb 20, 2009 at 18:32

chanwit

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1 Comment

Kevin Williams Over a year ago

I knew there was something groovier than (String[])data.toArray(new String[data.size]) Thanks!!!

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