As we all know, Java 8 provides many new features, Lambda expressions, functional interfaces, Optional, new date APIs. Let’s briefly talk about Stream’s past and present lives today.
We have used a lot of Lambda expressions, and the functional interface is to support Lambda expressions. Java 8 provides many built-in functional interfaces, such as Runnable, Comparator, etc., which are upgraded from the original API, and some It is a new addition to Java 8, such as Consumer.
