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Geek Academy Java8 new features video tutorial

Course Intermediate 14920

Course Introduction："Geek Academy Java8 New Features Video Tutorial" covers all new features of Java8: Lambda expressions, Stream interface, DoubleStream interface, LocalDate class, etc. The new features of Java8 make Java run faster, use less code (Lambda expressions), facilitate parallelization, and minimize null pointer exceptions.

Scala Tutorial

Course Elementary 13284

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

CSS Online Manual

Course Elementary 81719

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

SVG Tutorial

Course Elementary 12765

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

AngularJS Chinese Reference Manual

Course Elementary 24211

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

More courses

lambda - java8 An object is arranged in the order of a certain field in the object

For example, I want to have a class User with attributes like this: private int age, private String name, several objects {code...} Now I want to sort them in ascending order of age, that is, the final display result of lisr is user1 user3 user2. How to write it using lambda expression in java8? this...

2017-06-23 09:13:33

java-ee - java8的Collectors.reducing(）

{Code...} Probably I want to group the operationInfos collection according to the cityId in it, and then if the cityId is the same, add the SurgeryCount of the object and return it, but now the first v1 is null, execute v1.setSurgeryCount(v1. getSurgeryCount() + v2.g...

2017-07-03 11:43:35

java-ee - JAVA8 lambdas expression changes the value of external variables

As shown in the picture, I defined an etotalPrice externally, and then tried to change this value in two for loops, but an error was reported to me. How to solve it? (NumberUtil.add and mutiplyu are the basic +*methods of retaining 2 decimal places)

2017-06-12 09:24:10

How to get the time of last month through LocalDate in java8

As the title says, LocalDate has many methods about next, so how can I get the time of last month through Localdate? It can also be a certain day of last month. Then I can intercept the string, and finally it will be like "2017-06"

2017-06-14 10:52:53

Are there any concurrency issues when using Java8's stream to operate external collections?

Description: Take out the non-DataTime in cp. Is the following code reasonable? Is there any concurrency problem with deviceDataMap? Map<String,Map<String,String>> deviceDataMap = new HashMap<>(); String cp = "DataTime=200405060101.

2017-06-23 09:13:05

MoreQ&A

Are Anonymous Classes Obsolete in Java 8 with the Introduction of Lambda Expressions?

Course Introduction：Lambda Expressions: Demise of Anonymous Classes in Java8?With the introduction of lambda expressions in Java8, questions arise regarding the fate...

2024-11-12 comment 0 750

Do Lambda Expressions in Java 8 Replace Anonymous Classes?

Course Introduction：Lambda Expressions in Java8: A Replacement for Anonymous Classes?With the introduction of lambda expressions in Java8, the question arises: have...

2024-11-10 comment 0 862

Are Java 8 Lambdas a Complete Replacement for Anonymous Classes?

Course Introduction：Java8 Lambdas: A Demise for Anonymous Classes?With the release of Java8, lambda expressions have emerged as a compelling alternative to anonymous...

2024-11-10 comment 0 452

When Should You Choose Anonymous Classes Over Lambda Expressions in Java 8?

Course Introduction：Lambda Expressions vs. Anonymous Classes in Java8With the advent of Java8, lambda expressions have emerged as a powerful alternative to anonymous...

2024-11-11 comment 0 447

When to Choose Between Java Lambdas and Anonymous Classes?

Course Introduction：Comparing Java Lambdas and Anonymous ClassesWith the advent of Java8, lambda expressions have emerged as a newcomer to the code-writing arena,...

2024-11-09 comment 0 856

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