Sort Java list of objects

Question

I need to sort a java list containing objects of type Hotel

List<Hotel> hotelList = new ArrayList<>();

Inside the class I do have the method

    @Override
public List<Room> getAvailableRooms() {

    return this.rooms;
}

I need to sort my hotelList by the price attribute found in Room class. Any suggestions?

Possible duplicate of [How to use Collections.sort() in Java ? (Specific situation)](https://stackoverflow.com/questions/16425127/how-to-use-collections-sort-in-java-specific-situation) — Dhruv Sehgal, May 09 '18 at 20:34

score 0 · Answer 1 · answered May 09 '18 at 20:37

You should either use a Comparator or implement the Comparable interface

public class Foo implements Comparable<ToSort> {

private int val;

public Foo(int val){
    this.val = val;
}

@Override
public int compareTo(ToSort f) {

    if (val > f.val) {
        return 1;
    }
    else if (val <  f.val) {
        return -1;
    }
    else {
        return 0;
    }

}

Read more here https://dzone.com/articles/sorting-java-arraylist

Sort Java list of objects

1 Answers1