Apr 27, 2013 · I have a List of Double objects in Java. I want to sort the ArrayList in descending order. Input ArrayList:

Jan 31, 2018 · The ArrayList.sort method does take a comparator which can be used to specify the sorting criteria, but as mentioned on the , passing it a null comparator is also valid: And as you can …

Aug 26, 2013 · How would your approach look like if I wanted to add multiple different sort options, for example Override the compareTo method to order by the object name, but add another one for …

May 16, 2014 · Could somebody show me a quick example how to sort an ArrayList alphabetically in Java 8 using the new lambda syntax.

May 6, 2015 · I am looking to implement a sort feature for my address book application. I want to sort an ArrayList<Contact> contactArray. Contact is a class which contains four fields: name, home …

For Java 6, it's a modified version of mergesort. Check the description here: Collections#sort for Java 6 The sorting algorithm is a modified mergesort (in which the merge is omitted if the highest element in …

May 7, 2010 · 1295 I read about sorting ArrayLists using a Comparator but in all of the examples people used compareTo which according to some research is a method for Strings. I wanted to sort an …

Using Comparable (natural ordering): If sort algorithm always stick to one property: write a class that implements 'Comparable' and override 'compareTo' method as defined below

You're only honoring the contract that you need to establish for Collections.sort() to work properly. It's actually Collections.sort() that makes use of your compareTo method, since it only sorts things that …

Jul 13, 2015 · Is there a way to do it without using set method? No. Unless you wish to convert your ArrayList to an array, sort the array, and update the ArrayList with the sorted array.