Thursday, August 30, 2007

Collection.java ^ Collections.java methods

Collections.java static methods are just like Math.java static methods.

Collection.java interface methods are more "widely" used, as they must be implemented by all Collection subtypes. Maps are NOT subtypes.

* size() is a Collection interface method. Now you know ArrayList isn't using the word "length", as this name wouldn't fit Sets.
- - > "length" is used for arrays as in my_array.length == 7621
* add(Object) can't be used for Maps
* The overloaded toArray() can't be used for Maps

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