How to store data for comparison with a variable?

Question

Java

Good afternoon. I'm quite new to java. have a GPS coordinate. It must be compared for the shortest distance with a list of other coordinates. The question is that I do not know how to store those other coordinates. Their number is limited (within a hundred. Rather, even 50).
ArrayList ?

Answer 1

I suggest HashSet or HashMap. In these structures, searching by elements is fast.