was released on 18th March 2014. That’s a long time ago but still many projects are running on Java 8. It’s because it was a major release with a lot of new features. Let’s look at all the exciting and major features of Java 8 with example code. Quick Overview of Java 8 Feat...
Java 8was released in early 2014. This tutorial list down importantJava 8 featureswith examples such as lambda expressions, Java streams, functional interfaces, default methods and date-time API changes. 1. Lambda Expressions Lambda expressionsare known to many of us who have worked on other popu...
The use ofnullis so common that we rarely put more thought into it. For example, field members of objects are automatically initialized tonull,and programmers typically initialize reference types tonullwhen they don’t have an initial value to give them. In general,nullis used everytime where ...
Before Java 8, interfaces could have only public abstract methods. It was not possible to add new functionality to the existing interface without forcing all implementing classes to create an implementation of the new methods, nor was it possible to create interface methods with an implementation. ...
Default methods enable new functionality to be added to the interfaces of libraries and ensure binary compatibility with code written for older versions of those interfaces. 允许我们给接口添加一个非抽象的方法实现,只需要使用 default关键字即可,这个特征又叫做扩展方法。
Java ME 8 Developer Tools Java SE Features Productivity Generics: How They Work and Why They Are Importantby Josh Juneau Gain a solid understanding of generics in Java SE 8. JSR 308 Explained: Java Type Annotationsby Josh Juneau The benefits of type annotations and example use cases. ...
Java 8 code example for Variant #1 of Collectors.groupingBy() package com.javabrahman.java8.collector; import java.util.Arrays; import java.util.List; import java.util.Map; import java.util.stream.Collectors; public class GroupingWithCollectors { static List<Employee> employeeList = Arrays.asLi...
Lambda expressions and default methods allow us to implement map/filter/reduce in Java 8. Actually it is already implemented for us in the standard library.For example, imagine you want to get the current point scores from a list of player-names and find the player with the most points. ...
Java8 新特性见这里:Java8 新特性最佳指南。 你可以在 Archived OpenJDK General-Availability Releases 上下载自己需要的 JDK 版本! 官方的新特性说明文档地址:https://openjdk.java.net/projects/jdk/ 。 Guide:别人家的特性都用了几年了,我 Java 才出来,哈哈!真实!
In Java8, an interface is allowed to contain a method with a concrete implementation, which is called a "default method", and the default method is decorated with the default keyword. For example: interface MyFunc<T>{ T func(int a); default String getName(){ return "Hello Java8!"; }...