How to sort by two fields in Java?

Question

I have array of objects person (int age; String name;).

How can I sort this array alphabetically by name and then by age?

Which algorithm would

Answer 1

Or you can exploit the fact that Collections.sort() (or Arrays.sort()) is stable (it doesn't reorder elements that are equal) and use a Comparator to sort by age first and then another one to sort by name.

In this specific case this isn't a very good idea but if you have to be able to change the sort order in runtime, it might be useful.