Collections.sort having multiple fields java

Question

public class CandidateClass {
    double val;
    String location;
}

How do I sort the following list using the field val

List<CandidateClass> candidateClasses = new ArrayList<CandidateClass>();

Provide a custom `Comparator`; implement the `Comparable` interface — MadProgrammer, Dec 16 '15 at 06:12
This is already answered - http://stackoverflow.com/questions/14154127/collections-sortlistt-comparator-super-t-method-example/14154185#14154185 — Subhrajyoti Majumder, Dec 16 '15 at 06:15

score 1 · Answer 1 · answered Dec 16 '15 at 06:21

1

You do like this:

public class CandidateClass implements Comparable<CandidateClass> {
    double val;
    String location;

    @Override
    public int compareTo(CandidateClass o) {
        if (val > o.val) {
            return 1;
        }
        if (val < o.val) {
            return -1;
        }
        return 0;
    }
}

Now it can be Comparable.

Collections.sort(candidateClasses );

answered Dec 16 '15 at 06:21

Bahramdun Adil

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Thanks #Adil for the answer. It works as I need. – Md. Masudur Rahman Dec 16 '15 at 06:35
http://www.javatbrains.com/2015/05/how-to-sort-list-of-objects-in-java.html – Nallamachu Dec 16 '15 at 06:57

Collections.sort having multiple fields java

1 Answers1