Generic pair class

Question

Just attempting this question I found in a past exam paper so that I can prepare for an upcoming Java examination.

Provide a generic class Pair for representing pair

Answer 1

You can look to implementation of standard Java classes AbstractMap.SimpleEntry and AbstractMap.SimpleImmutableEntry. It is pretty easy to google sources:

• http://www.docjar.com/html/api/java/util/AbstractMap.java.html
• http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/util/AbstractMap.java