Java - Sort - Variable comparator

Question

I\'m trying to sort a list of Objects based upon user input. How can I go about having the sort method implement a variant comparator?

Example:

List<         


        

Answer 1

This will helps you:

String sortBy = "key";
list.sort(Comparator.comparing(report -> {
    try {
        return (Comparable) report.getClass().getDeclaredField(sortBy).get(report);
    } catch (Exception e) {
        e.printStackTrace();
        throw new RuntimeException("exception", e);
    }
}));