Java multiple arguments dot notation - Varargs

Question

I've just acknowledged dot notation for method declaration with multiple arguments
like this:

public function getURLs(URL... urls){
    for(int i = 0; i < urls.length; i++){
        // walk through array of arguments
    }
}

And using like this

getURLs(url1, url2, url3);

where those method arguments are converted implicitly into URL[] urls

Did I understand its behavior properly?
Where is documentation to this syntax?
From which version of JRE (J2ME,J2SE,Dalvik) is this supported?

score 65 · Accepted Answer · answered Sep 24 '11 at 12:40

65

Yes, that is how it works. The arguments are automatically put into an array. The argument "urls" behaves like a URL[]. Varargs are documented here. They were introduced in Java 1.5, so, are available in J2SE 1.5+, and all of Android since it supports Java 1.5+ language features. No version of JavaME/J2ME supports it.

answered Sep 24 '11 at 12:40

Sean Owen

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does this array preserve the order ? – kommradHomer Mar 05 '15 at 08:40
Of course, wouldn't be much use if args were passed in an arbitrary order – Sean Owen Mar 05 '15 at 10:46

score 13 · Answer 2 · answered Sep 24 '11 at 12:39

13

The syntax was introduced in Java 5 and is called varargs:

http://download.oracle.com/javase/1,5.0/docs/guide/language/varargs.html

answered Sep 24 '11 at 12:39

Russ Hayward

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Java multiple arguments dot notation - Varargs

2 Answers2

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