Techniques for improving the performance of Java string encoding and decoding

Introduction: common string codes include LATIN1, UTF-8, UTF-16 and GB18030. They have their own characteristics, and the conversion between them is complex. This article will introduce the skills to improve the performance of Java string encoding and decoding. Author Wen Shaojin (high speed railway) Source: Alibaba developer official account ...

Posted by phil88 on Tue, 24 May 2022 14:50:50 +0300

Mybatis Series Textbook - Basic - many to one

Step 1: run first, see the effect, and then learn Step 2: imitation and troubleshooting Step 3: many to one relationship Step 4: see the effect before learning Step 5: modify product java Step 6: product xml Step 7: mybatis config xml Step 8: Test mybatis Step 9: runnable projects Step 10: Exercise - modify the many to one relationship ...

Posted by M. Abdel-Ghani on Tue, 24 May 2022 13:15:21 +0300

Java8 practice notes (04): introducing streams

Almost every Java application makes and processes collections. Although collections are indispensable to almost any Java application, collection operations are far from perfect. Many business logic involve operations similar to database, such as grouping several dishes according to categories (such as all vegetarian dishes), or finding the mo ...

Posted by danieloberg on Tue, 24 May 2022 10:17:38 +0300

An article quickly understand the four commonly used thread pools in Java

Using thread pool in Java, you can directly create an instance of thread pool with the constructor of ThreadPoolExecutor. See the previous article for how to use it Detailed explanation of Java thread pool construction parameters . However, in the Executors class, we are provided with methods to create common thread pools. Next, let's learn ab ...

Posted by Crys on Tue, 24 May 2022 08:06:50 +0300

Object oriented learning III (interface, polymorphism)

Interface An interface is a convention specification, a collection of multiple abstract methods, which only defines the functions and does not realize the functions. effect: In order to formulate specifications, it embodies the idea of separating specifications from matters, and also reflects the characteristics of low coupling between componen ...

Posted by rachae1 on Tue, 24 May 2022 08:03:06 +0300

JAVA wheel making - zookeeper node operation tool class

ZooKeeper is a distributed, open-source distributed application coordination service. It is an open-source implementation of Chubby of Google and an important component of Hadoop and Hbase. It is a software that provides consistency services for distributed applications. Its functions include configuration maintenance, domain name service, dist ...

Posted by wscreate on Tue, 24 May 2022 06:07:13 +0300

Java: new features in Java 8

1. Lambda expression 1.1 benefits of lambda expressions Lambda is an anonymous function. We can understand lambda expression as a piece of code that can be passed (pass the code like data) Using it, you can write more concise and flexible code. As a more compact code style, the language expression ability of Java has been improved The essence ...

Posted by simonb on Tue, 24 May 2022 05:54:51 +0300

Common class library - String class

String class String overview ​ 1. String class in Java Lang package, so there is no need to guide the package when using ​ 2 the String class represents a String. All String literals (such as "abc") in the Java program are implemented as instances of this class, that is, all double quoted strings in the Java program are objects of ...

Posted by znouza on Tue, 24 May 2022 04:49:14 +0300

Filter (beginner)

Filter filter 1 Filter what is a filter Filter filter is one of the three major components of Java Web. The three components are: Servlet program, Listener listener and filter filter Filter filter, which is the specification of Java EE. That is, the interface Filter filter is used to intercept requests and filter responses. Common application ...

Posted by Master Zen on Tue, 24 May 2022 04:24:00 +0300

Comprehensive implementation of Android OkHttp + Glide + RecyclerView + ButterKnife popular framework

requirement Use one OkHttp to obtain muke.com movie data (20 pieces), use Glide to load pictures and display them in each movie Item, and search and display them by movie name and type. Operation effect Task description 1, Contents displayed on the home page: Movie sea ...

Posted by plutoplanet on Tue, 24 May 2022 04:06:34 +0300