push_back() and push_front() in Java

Question

Is there any collection class in java, that implements push_back() and push_front() methods?

score 11 · Accepted Answer · answered Jan 22 '10 at 11:54

11

The class java.util.LinkedList has addFirst/Last(), getFirst/last() and removeFirst/Last().

answered Jan 22 '10 at 11:54

Jerome

score 7 · Answer 2 · edited Jan 22 '10 at 12:09

7

Any collection that implements Deque should have it (ArrayDeque, LinkedList)

edited Jan 22 '10 at 12:09

paxdiablo

answered Jan 22 '10 at 11:57

fn.

@Jerome, in the absence of a request for a specific version, I think it's okay to assume that an answer can assume any version. You could just as easily complain that your answer requires 1.2 :-) – paxdiablo Jan 22 '10 at 12:10

score 1 · Answer 3 · edited Jun 02 '20 at 05:19

1

The List appears to with both add functions.

edited Jun 02 '20 at 05:19

fospathi

answered Jan 22 '10 at 11:53

Daniel A. White

1

Hmm, List is an interface and both variants of add are specifically marked as optional, throwing UnsupportedOperationException if the add method is not supported by the concrete class. It happens that all known implementing classes support both variants but not necessarily all user-defined ones. You might want to make that clear. – paxdiablo Jan 22 '10 at 12:20

3 Answers3