What is the use of lambda expressions, a new feature of Java 8 (usage examples)

We've been looking forward to lambda bringing the concept of closure to Java for a long time, but we lose a lot of value if we don't use it in collections. The problem of existing interface migration becoming lambda style has been solved through default methods. In this article, we will deeply analyze the bulk operation in Java collection and unlock the mystery of the strongest function of lambda.

1. About jsr335, JSR is the abbreviation of Java specification requests, which means Java specification requests, The main improvement of Java 8 is the lambda project (JSR 335), which aims to make it easier for Java to write code for multi-core processors. JSR 335 = lambda expression + interface improvement (default method) + batch data operation. In addition to the previous two articles, we have completely learned the relevant contents of jsr335.

2. External vs internal iterations previously, Java collections could not express internal iterations, but only provided a way of external iterations, that is, for or while loops.