Minor Description
Suppose x is a collection known to contain only strings. The following code can be used to dump the collection into a newly allocated array of String:
String[] y = x.toArray(new String[0]);
Note that toArray(new Object[0]) is identical in function to toArray().
https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html
Recommended and faster to use the zero-size-array format
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