java tag with objects?

Question

So, while looking through others code ive been seeing things like such as in the following code:

List myList = new ArrayList<String>(Arrays.asList(s.split(" ")));

What exactly does this do? I haven't been able to find any documentation, in part by the reason that I don't really know what it is called. And if possible an explanation of what exactly they do?

This is called generics. http://docs.oracle.com/javase/tutorial/java/generics/ — Alexis C., May 09 '14 at 14:42
It is the type of data you want to put inside the `Collection`. The compiler would now check, if you are putting in the correct type of data as defined. — Dhrubajyoti Gogoi, May 09 '14 at 14:46

score 1 · Accepted Answer · answered May 09 '14 at 14:49

That particular code generates a list that contains the entries resulted from splitting the s string at each space.

The < String> defines the generic type for the List, and the advantage (among other ones) is that you can call myList.get(index) and not have to cast it to a String.

score 0 · Answer 2 · answered May 09 '14 at 14:48

0

This is a generic. You are instantiating an ArrayList that stores String objects.

answered May 09 '14 at 14:48

Nathaniel Flath

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java tag with objects?

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