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catalogue Variable parameter Create immutable collection Stream stream Common generation methods of Stream Stream intermediate operation method Other common intermediate methods Stream termination operation method Collection method Collection method - toList and toSet Collection method - toMap Extended case landlords Extended case: ...

1, FastDFS components and other nouns 1,tracker server Tracking server: used to schedule requests from clients. And record the information status of all storage groups and storage servers in memory. 2,storage server Storage server: used to store files (data) and file attributes (metadata) 3,client Client: the initiator of the service re ...

Spring is a widely used framework in the process of Java Web development. It is a lightweight application framework. Its powerful function and excellent performance are loved by many developers.In the actual project development process, the server is divided into three layers: presentation layer (Web), business logic layer (Service) and persist ...

object-oriented object-oriented programming Essence: organize code in the form of classes and organize (encapsulate) data with objects. Characteristics: encapsulation, inheritance, polymorphism. method break: jump out of the switch and end the loop Return: end the method. The result has been returned. The return value and return value type a ...

Basic courseLDAP, the full name of Lightweight Directory Access Protocol (English: Lightweight Directory Access Protocol), is a directory access protocol running on TCP/IP. A directory is a special database whose data is often queried but not updated frequently. It is specifically optimized for read, browse and search operations. Directories ar ...

Tip: after the article is written, the directory can be generated automatically. Please refer to the help document on the right for how to generate it Chapter VIII file operation (IO Technology) Both the program and the stored data are complete; The program data we wrote earlier is not actually stored, so the data disappears after the p ...

1. General Reprint: ThreadLocal memory leak code demonstration example demonstration First look at the article: Cause analysis of ThreadLocal memory leak Related articles: [high concurrency] ThreadLocal, InheritableThreadLocal [Java] introduction and source code of ThreadLocal in Java 2. Cases 2.1 do not use ThreadLocal The following ...

Express - based on node JS platform web application development framework - Express Chinese document | express Chinese networkhttps://www.expressjs.com.cn/ Express is based on Node The web development framework developed by JS is a Node JS module; Since it is based on Node JS, the premise of using express is that the computer must have installe ...

Share: In python, there are two types of data. Built in and custom. Built in data types include numbers, strings, Booleans, lists, tuples, dictionaries, Bytes, collections, and some less commonly used data types. Customized data types are generally in the form of classes, and the above built-in types are combined as required to become unique ...

catalogue preface 1, Pure annotation development 2, Operation steps 1. Import dependency 2. Create the target interface, define the abstract method, implement the implementation class of the target interface, and rewrite the method (target method) 3. Create a notification class and define notification methods 4. Create Spring core config ...