Java Arrays - What are they
开发者_运维百科From looking at the Java Collections API i see that arrays are not regarded as collections. If not what are arrays regarded as?
Arrays are "special" in Java - they don't implement any interfaces, which means they can't implement the collection interfaces. They're collections in "natural language" terms, and you can use the enhanced for loop over them - but if you want to use an array within the collection API, you'll need something like Arrays.asList
which wraps an array with the List<T>
interface. (The result is only a view on the array - changes to the array are visible through the list, and vice versa.)
(This is in contrast to .NET, where T[]
implements IList<T>
etc.)
精彩评论