Sorting ArrayList by string values as double

Question

I need to sort an ArrayList by a certain value.

In this case, the list object getUsers23 is a String, but I need to compare that value as double.

Example value or getUser23 = "67.455432434234"

At the moment, using Collections.sort() to sort the arrayList is sorting the arrayList by getUser23 as string value:

  Collections.sort(spotsList1, new Comparator<Spots>(){
            public int compare(Spots obj1, Spots obj2) {

                return obj1.getUsers23().compareToIgnoreCase(obj2.getUsers23()); 

            }
        });

Your question is not clear. Do you have 67.455432434234 stored against getUser23 in your object? — Rajen Raiyarela
– Rajen Raiyarela, Commented Mar 31, 2020 at 15:44
If you have getter for that then you can do Double.valueOf("67.455432434234") or Double.parseDouble("67.455432434234") as @Farid mentioned to convert to double and then compare — Rajen Raiyarela
– Rajen Raiyarela, Commented Mar 31, 2020 at 15:46
convert the string to double using 'Double.parseDouble(getUsers23())' then compare them — Farid
– Farid, Commented Mar 31, 2020 at 15:46
@RajenRaiyarela. just before the return or inside the return? — mvasco
– mvasco, Commented Mar 31, 2020 at 15:47

Rajen Raiyarela · Accepted Answer · 2020-03-31 15:53:33Z

1

You can convert to double and then compare.

Modify your code inside comparator as

try{
    return Double.valueOf(obj1.getUsers23()).compareTo(Double.valueOf(obj2.getUsers23()));
}catch (Exception e){
   return -1;
}

edited Mar 31, 2020 at 15:53

answered Mar 31, 2020 at 15:49

Rajen Raiyarela

5,6344 gold badges23 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

mvasco Over a year ago

let me try it out

Collectives™ on Stack Overflow

Sorting ArrayList by string values as double

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related