using forEach to iterate over varArgs [duplicate]

问题

This question already has answers here:

How can I create a stream from an array? (6 answers)

Closed 4 years ago.

Can I use forEach() or stream() on varArgs ?

   protected void getSomeIds (List<String>... varArgs) {
     for(List lst:varArgs) {
     System.out.println("This works");
    }
   //Following does not compile 
    varArgs.forEach();
   // nor 
    varArgs.stream();
   }

回答1:

Varargs behave similarly to arrays, so you can get a Stream of the varargs using Stream.of :

Stream<List<String>> stream = Stream.of (varArgs);

And you can iterate over them with :

Stream.of(varArgs).forEach (...);

回答2:

You are confusing syntax. Try this:

for(List lst:varArgs) {
    lst.forEach(str -> System.out.println(str));
}

来源：https://stackoverflow.com/questions/33107636/using-foreach-to-iterate-over-varargs