java key/value pair object, that isn't an array/map

Question

I want a key value pair object. Just two strings

so Object<String, String>

is there an existing object in java to facilitate this before I reinvent the wheel?

The only reason I didn't immediately gravitate to Hash/Map this time is because that one object is made to store multiple key/value pairs. Is there one designed to hold just a single key/value pair, that I can turn into an array if I feel inclined to do so?

There is no built in object to support this like `Pair` in C++, but it would be relatively easy to create one. — Hunter McMillen, May 23 '12 at 15:32
already answered: http://stackoverflow.com/questions/156275/what-is-the-equivalent-of-the-c-pairl-r-in-java — cadrian, May 23 '12 at 15:34
"that I can turn into an array if I feel inclined to do so?" -- can you clarify? Do you want `Pair( str1, str2 ).toArray() --> [str1, str2]` do you actually want a single-entry map? — trutheality, May 23 '12 at 16:08
@CQM Just wondering whether you actually want `Collections.singletonMap(...)` — trutheality, May 23 '12 at 16:10

score 4 · Accepted Answer · answered May 23 '12 at 15:32

4

You will need to create your own. This is done (AFAIK) to facilitate a better semantic meaning from the class name, than a general Pair<> or KeyValuePair<> would

answered May 23 '12 at 15:32

Attila

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See http://stackoverflow.com/questions/156275/what-is-the-equivalent-of-the-c-pairl-r-in-java/156685#156685 for some more explanation. – Louis Wasserman May 23 '12 at 16:10

score 2 · Answer 2 · edited May 23 '17 at 12:15

2

http://docs.oracle.com/javase/7/docs/api/java/util/Map.Entry.html

and an implementation from SO Java - How to create new Entry (key, value)

edited May 23 '17 at 12:15

Community

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answered May 23 '12 at 15:33

bpgergo

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That class sort of implies that this class will be used as a part of something, with a bunch of these `Entry` objects. The OP just wants a stand alone object that can hold two things. – Hunter McMillen May 23 '12 at 15:35

score 0 · Answer 3 · answered Jun 09 '16 at 01:50

You could try a Linked-List of Pair.

Basic structure

(0) --> <-- ((0)(Pair < 1, "Stud" >)(2)) --> <-- (1)(Pair < 2, "Sexy" >)(3)....

Where each Node in the structure is (prev. < K,V >, this < K,V >, next < K,V >) Allows for duplicated keys however...

Head & Tail are null if the Linked-List is empty;

java key/value pair object, that isn't an array/map

3 Answers3