flatmap java

About the pseudo-share of the article has been many, for multithreaded programming, especially the multi-threaded processing lists and arrays, we should pay great attention to the problem of pseudo-sharing. Otherwise, not only can not play the advantages of multithreading, but also may be worse than single-threaded performance. With the Java version of the update, then the different versions of the practice of reducing pseudo-sharing are different, ac

Java.util.stream such a package (stream) is introduced in Java8, and the addition of new features is designed to help developers perform a series of operations on collections at a higher level of abstraction.With the help of the Java.util.stream package, we can concise declarative representations of collections, arrays and other possible parallel processing on the data source. Implement changes from an external iteration to an internal iteration. Higher Level abstraction Conside

My Java journey Lesson 3: JAVA language syntax basics and java journey 1 integerInt num = 0000000_000; // The syntax supported since java 7 is easier to read. The java compiler removes 2 strings and cannot use the = Operator to check whether the two strings are equal, instea

Xiaokang will accompany you to learn JAVA---JAVA basics and java Basics This article is a small Summary of JAVA. 1. There are three ways to annotate Java: (1) start with the "//" Mark until the end of the line; (2) text between the symbols "/*" and; (3) document comments. 2.

Not only the famous Struts2, even a small Java program can be internationalized, it is not as much as the internet said, non-western characters, such as our Chinese, island of Japanese and so on, must use Native2ascii transcoding, Frank, Internationalized String configuration file Xx_ language. Propreties does not support non-western characters and can only be transcoded, but you can take advantage of the approach I described in the

[Java SE] how to install JDK and configure the Java Runtime Environment, JDK JavaAbstract: no matter how hard it is to be used as a Java code farmer or a high-end Java System Architect, if JDK is not installed or the Java Runtime Environment is configured, it will be difficu

Java ---- use regular expressions to match keywords in Java source code, java ---- Regular Expressions Write this blog to learn the regular expressions in Java systematically. Another reason is that there was a problem that could not be solved. I had a reverse match and I couldn't stand it myself. However, as a code mo

A few days ago wrote a Java 8 in 2019 to stop free of charge to the enterprise to provide updated articles, in an attempt to force users to a new generation of Java version upgrade, but unfortunately, the small part of today received the Oracle Java version of the upgrade push, Loaded is actually JAVA TEN!!!!Unexpected

Java 8 corresponds to the JDK version of JDK8, and the official website download back when installed, the folder is written JDK1.8, the same meaning. (and this version of the name is also a regular, and so on)First, Java 51, 1190000004417288Second, Java 62, 1190000004417536Third, Java 71, http://www.eclipse.org/jdt/ui/

Java learning notes (entry) _ basic java syntax, learning notes _ javaPreface After learning the first java program, you will come to the system to learn java. Starting with the basic syntax, you can also understand this syntax in English or Chinese, but everyone has their own characteristics and differences. Learning