Java vs map collections within collections

Question

According to http://docs.oracle.com/javase/tutorial/collections/interfaces/index.html there are two top-level interfaces called assembly and map.

What is the specific reason for separating the two?

Is it that all key-value data structures implement the map interface, and all others implement the collections interface?

+5

klijo Jul 13 '12 at 2:15

2 answers

A Map - , . A Collection - .

List a Map, . SO .

+5

Jon 13 . '12 2:19

doNotCheckMyBlog · Accepted Answer · 2012-07-13T02:20:02+0000

Yes, it's right! Check all classes Listand then check all related classes Map.

and there is this amazing discussion about this issue

Visually

This is a collection , so you know that there are books, and it’s in order, like 0,1,2,3 ...

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, , , .

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