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landscape Java 8's lambda introduces three method references, constructor references, and array references to reduce code development. It should be noted that if you need to use this feature, the method return value type, parameter number and type must be consistent with the functional interface. example Object instance meth ...

Reprinted from: Java8 new features series - Lambda - wechat blog Lambda Expressions in Java 8 Lambda expressions are the most popular feature of Java 8. They introduce the concept of functional programming into Java, a completely object-oriented imperative programming language. The working principle of functional programming language is ...

1 Introduction background and principle of fastthreadlocal Since jdk already has a ThreadLocal, why should netty create a FastThreadLocal? Where is FastThreadLocal? This needs to start with jdk ThreadLocal itself. As shown below: In java threads, each thread has a ThreadLocalMap instance variable (if ThreadLocal is not used, this Map will ...

★ this is Xiao Leng's blog ‡ see the column for high-quality technical articles The official account of the individual, sharing some technical articles, and the pit encountered. Current series: Java 8 new features series Source code git warehouse Code Git warehouse address New Java 8 features Java 8 (also known as jdk 8) is a major v ...

❤️ About the author: Hello, I'm Xiao xuzhu. High quality creators in Java 🏆， CSDN blog expert 🏆 ❤️ Technical work should be rewarded ❤️ give the thumbs-up 👍 Collection ⭐ Look again and form a habit What is the JSR specification Explanation from Baidu Encyclopedia: JSR is the abbreviation of Java Specification Requests, which means ...

1, Foreword Two days ago, we did an import function. The import started very slowly. It took more than one minute to import 2w pieces of data. Later, we optimized it bit by bit, from directly linking the list into Mysql, assigning the list into Mysql, and multi threading the list into Mysql. Time is getting less and less. It was very cool, and ...