How to pass Scala command line arguments to a Java method?

Question

I have a piece of Scala code:

class A {
  def main(args: Array[String])
}

Then a piece of Java code:

class B {
    public static int test(final String... args) {
        System.out.println("This is a test.");
        // Use the arguments
        ...
    }
}

What I want is to call B.test within A.main like below:

class A {
  def main(args: Array[String]) = {
    val result = B.test(args)
  }
}

The above code won't work because the types do not match. If somebody could provide an elegant solution it would be highly appreciated.

Please only change the Scala part as the Java part will come from another lib. Thank you!

I don't have the repl at hand to verify, but think that B.test(args:_*) should work. — George
– George, Commented Jan 10, 2014 at 10:28
@folone You should post that as an answer, so the question can be closed — 0__
– 0__, Commented Jan 10, 2014 at 15:13

George · Accepted Answer · 2014-01-13 13:06:42Z

2

As per section 4.6.2 of scala language specification, to feed a list/array to the function with repeated parameters (T... args) in case with java, or (args: T*) with scala, the argument should be marked to be a sequence argument via a _* type annotation.

In this particular case B.test(args: _*) will work.

answered Jan 13, 2014 at 13:06

George

8,38812 gold badges67 silver badges109 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to pass Scala command line arguments to a Java method?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related