Using a Comparator to sort arrays for classes

Processing:Comparator Example

import java.util.Comparator;
import java.util.Collections;

Collections.sort(keywords, new CustomComparator());

public class CustomComparator implements Comparator<Keyword> {
    @Override
    public int compare(Keyword o1, Keyword o2) {
      Integer val1 = (Integer) o1.keywordColor;
      Integer val2 = (Integer) o2.keywordColor;
        return val1.compareTo(val2);
    }
}