Sorting List of objects in android [duplicate]

Question

This question already has answers here:

Sorting an ArrayList of objects using a custom sorting order (12 answers)

Closed 9 years ago.

Suppose I have the following object class:

public class Country {
 private int ID;
 private String name;
 private Double distance;
}

and I have a list of this object which contain many objects:

List<Country> myList;

how i can sort the list based on the Double distance e.g to put objects with less distance first? Is there a ready function to do this?

Or i want to store 3 countries of minimum distances in another list.

Answer 1

Use Collection.sort and pass your own implementation of Comparator

Example:

List<Country> items = new ArrayList<Country>();
 
.....
Collections.sort(items, new Comparator<Country>() {
 @Override
 public int compare(Country o1, Country o2) {
 return Double.compare(o1.getDistance(), o2.getDistance());
 }
});

• Pshemo: Comparator doesn't need to be anonymous. Maybe it is better to reword it as "your own" or something similar to avoid possible misunderstandings.
• MSMC: thanks dear, regards. @ΦXoce웃Пepeúpa
• ΦXocę 웃 Пepeúpa ツ: Got it... I will rephrase that
• ΦXocę 웃 Пepeúpa ツ: @MSMC you are welcome