Android sort arraylist by properties

Question

I want to sort an ArrayList by a property. This is my code...

public class FishDB{      public static Object Fish;     public ArrayList<Fish> list = new ArrayList<Fish>();      public class Fish{         String name;         int length;         String LatinName;         //etc.           public Vis (String name) {             this.name = name;         }     }      public FishDB() {         Fish fish;          fish = new Fish("Shark");         fish.length = 200;         fish.LatinName = "Carcharodon Carcharias";          fish = new Fish("Rainbow Trout");         fish.length = 80;         fish.LatinName = "Oncorhynchus Mykiss";          //etc.         }     } } 

Now I want in want to sort this ArrayList by a property e.g the latinname in another activity. But I don't know how to do that. Does anybody know how?

Answer 1

You need to implement a Comparator, for instance:

public class FishNameComparator implements Comparator<Fish> {     public int compare(Fish left, Fish right) {         return left.name.compareTo(right.name);     } } 

and then sort it like this:

Collections.sort(fishes, new FishNameComparator()); 

Answer 2

You can simply do it by this code:

Collections.sort(list, new Comparator<Fish>() {     public int compare(Fish o1, Fish o2) {         return o1.name.compareTo(o2.name);     } });