Collection Archives - SimpleCoding

Java 17 Example Of flatMap Method

May 29, 2023May 17, 2023 by TheWriter

Let’s see example of flatMap. This method is part of the Stream API. We can use when we have nested collections but need only one level (we need to remove the nested collections ) and merge all the elements in one single collection. Lets have a simple class Main: The result is:

Java remove elements from collection by filtering

March 18, 2023October 27, 2022 by TheWriter

One of the way to remove elements of collection (in this example list) is to use method removeIf Method declaration: default boolean removeIf(Predicate<? super E> filter) Description: Removes all of the elements of this collection that satisfy the given predicate. Errors or runtime exceptions thrown during iteration or by the predicate are relayed to the caller. … Read more