Sorting List of objects in android

Question

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.

score 13 · Accepted Answer · edited Jun 20 '20 at 09:12

13

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());
    }

});

edited Jun 20 '20 at 09:12

Community

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answered May 06 '16 at 16:14

ΦXocę 웃 Пepeúpa ツ

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Comparator doesn't need to be anonymous. Maybe it is better to reword it as "your own" or something similar to avoid possible misunderstandings. – Pshemo May 06 '16 at 16:23
thanks dear, regards. @ΦXoce웃Пepeúpa – MSMC May 06 '16 at 16:25
Got it... I will rephrase that – ΦXocę 웃 Пepeúpa ツ May 06 '16 at 16:25
@MSMC you are welcome – ΦXocę 웃 Пepeúpa ツ May 06 '16 at 16:26

Sorting List of objects in android

1 Answers1

Example: