stream

Interface is an integral part of java and has become so powerful over the years, that it shifted the way a Java programmer thinks.

To use the partitioningBy Collector, you have to pass the Collectors.partitioningBy in the collect() method of Stream API.

Stream API’s groupingBy is similar to GROUP BY of SQL since it groups and collects the objects based on given condition or value.

how you can iterate over a List, be it ArrayList, LinkedList or any other. Basic loop to iteration to Stream API. And also, figure out which one is best suitable for our code.

The Stream API, included in Java 8, is utilised for processing collections of objects. Stream API can make your code more simple, efficient, and readable.

Using Functional interfaces provided by Java we can become more functional. And Knowing them would help us utilise Stream API fully