How to store an array of pairs in Java?

Question

I am new to Java, I want to store an array of pair of doubles. My code looks like this:

import java.util.ArrayList;
import java.util.Map.Entry;

List

        

Answer 1

Is Entry a class you defined? You instantiate it with new.

Entry pair = new Entry(d1, d2);

Note I am assuming you defined a constructor that takes 2 doubles, and you have references for d1 and d2.

I suggest you NOT use the Map.Entry class. The semantics for that class are such that the values are a key and a value, fitting with the way Maps work.