What are the new features of java8

The new features of java8 are: 1. Lambda expression; 2. Method reference; 3. Default method; 4. New compilation tool; 5. Stream API; 6. Date Time API; 7. Option; 8. Nashorn javascript engine.

Java8 has added a lot of new features, we mainly discuss the following:

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1. Lambda expression

Lambda allows a function to be used as a parameter of a method (the function is passed into the method as a parameter).

2. Method reference

Method reference provides a very useful syntax that can directly reference methods or constructors of existing Java classes or objects (instances). Used in conjunction with lambda, method references can make the language structure more compact and concise and reduce redundant code.

3. Default method

The default method is a method that has an implementation in the interface.

4. New tools

New compilation tools, such as: Nashorn engine jjs, class dependency analyzer jdeps.

5. Stream API

The newly added Stream API (java.util.stream) introduces the true functional programming style into Java.

6. Date Time API

Strengthen the processing of date and time.

7. Optional class

The Optional class has become part of the Java 8 class library and is used to solve null pointer exceptions.

8. Nashorn JavaScript engine

Java 8 provides a new Nashorn javascript engine, which allows us to run specific javascript applications on the JVM.

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