In this tutorial, We'll learn how to utilise stream filter () with several filter conditions (can be more than one condition). How to display integer array list values on screen and sort using Collections.sort () and reverse () method. Guide to Sorting in Java - HowToDoInJava 2. All examples shown are on GitHub at the end of this article. and lets use the pre Java 8 or the current approach to sorting this list based on the firstName: //Sorting using Anonymous Inner class. The signature of the method is: Stream<T> sorted () Parameter Let's discuss certain ways to sort list according to other list order. Merge two lists in Java and sort them using Object property and another ... We can use Comparator.comparing () and pass a function that extracts the field to use for. The parameter 'c' represents the Comparator used to compare list elements. Complex Comparator. Note that we can change the order to descending using the reverse parameter and setting it to True. Sorting in Natural Order and Reverse Order Collections.sort(list); //Sorts in natural order Collections.sort(list . Using Java 8 Streams. To get the drop-down list, I have created a data validation list. ComparisonChain 5. Learn to use Collections.sort() method to sort a list of objects using some examples.. By default, the sort() method sorts a given list into ascending order (or natural order).We can use Collections.reverseOrder() method, which returns a Comparator, for reverse sorting.. 1. That means the inner aggregated Map value type should be List. The Collections.sort () method also sorts elements in ascending order. Sort a list of dictionaries based on the "year" value of the dictionaries: Sorting list of Objects on Multiple field/parameters : What if we have a requirement to sort ArrayList of objects in accordance with 2 / 3 fields like, First, sort according to customer name. 3. If the elements are not comparable, it throws java.lang.ClassCastException. Because the sort (list) method always sorts the specified list into ascending order, so if we want to sort by descending order, we need to use the Collections.reverse (list) method in addition. To get the list, we should not pass the second argument for the second groupingBy () method. 3. Model class and multiple comparators 2. Java Collections sort() - HowToDoInJava Stream interface provides a sorted () method to sort a list. In the main () method, we've created an array list of custom objects list, initialized with 5 objects.