Java 8 streams collector groupingBy
Suppose we have a List of strings and want to group them by length.
We can use Collectors.groupingBy() for this task.
Java 8 Streams read file
In Java 8 we can use Files.lines to read file into stream and do manipulations.
Let’s say we want to count the number of unique words in the file.
Java 8 – flatmap to find a pair of elements from two List
Today we will see how using java 8 stream flatmap method we can wind all the pairs from two Lists.
Java 8 – get all unique characters from List of string using flatmap
Let’s see how we can get all the unique characters from List of Strings.
Java 8 streams – How to remove duplicate elements from array
Let’s see how we can remove duplicate elements from array using.
Parallel stream and CompletableFuture example
Let’s see how we can paralellize java application. Suppose we have asked to develop application where given the libraries list we need to calculate the number of books in each library. Suppose calculation is an expensive operation. The first thing that comes to our mind is to do this by streams.