How to convert a List to variable argument parameter java

问题

I have a method which takes a variable length string (String...) as parameter. I have a List<String> with me. How can I pass this to the method as argument?

回答1:

String... equals a String[] So just convert your list to a String[] and you should be fine.

回答2:

String ... and String[] are identical If you convert your list to array.

using

Foo[] array = list.toArray(new Foo[list.size()]);

or

Foo[] array = new Foo[list.size()];
list.toArray(array);

then use that array as String ... argument to function.

回答3:

You can use stream in java 8.

String[] array = list.stream().toArray(String[]::new);

Then the array can be used in the ...args position.

来源：https://stackoverflow.com/questions/16748470/how-to-convert-a-list-to-variable-argument-parameter-java