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The world kisses me with pain and asks me to return it with a song -- Tagore's collection of birds Although usually each sub thread only needs to complete its own task, sometimes we want multiple threads to work together to complete a task, which involves inter thread communication. With regard to inter thread communication, the methods and ...

Use of Android retro fit 1, Overview 1. What is retrofit Retrofit is a popular network request framework. It can be understood as an enhanced version of okhttp. Okhttp is encapsulated at the bottom. To be exact, retrofit is the encapsulation of a RESTful http network request framework. Because the network request is essentially completed ...

Status of thread pool (5 kinds): The AtomicInteger variable ctl is very powerful: the low 29 bits represent the number of threads in the thread pool, and the high 3 bits represent the running state of the thread pool: RUNNING: -1 << COUNT_ Bits, that is, the upper 3 bits are 111. The thread pool in this state will receive new tasks and ...

To use the mybatis plus code generator, you must first add dependencies (also known as import packages), and import packages according to the official website recommendations and project requirements Official website link: https://mp.baomidou.com/guide/ 1. Add code generator dependency <dependency> <groupId>com.baomidou&lt ...

Construction of centos7 Nacos service registry Since the spring cloud registry Eureka has long stopped maintenance, we use Nacos official: https://nacos.io/zh-cn/docs/what-is-nacos.html Welcome to the world of Nacos! Nacos is dedicated to helping you discover, configure, and manage microservices. Nacos provides a set of easy-to-use feature ...

On this page, we will provide an example of java 8 Arrays parallel sorting. Java 8 introduces a new method, parallelSort(), in the array class. 1. Java 8 Arrays.parallelSort() uses the sort merge algorithm to decompose the array into sub arrays, and then sort and merge them themselves. 2. The array is decomposed into subarrays, and the subar ...

Through this article, you will gain: The relationship among rootbeandefinition, BeanDefinition and BeanDefinitionMap is its basic meaning Implementation subclass of BeanDefinition interface Meaning of beanClass member variable in BeanDefinition subclass Process for obtaining rootbeandefinition according to beanName 1, BeanDefinit ...

Author: Waste elder martial brother Source: https://www.cnblogs.com/cjsblog/p/9712457.html 1. Introduction The task of read-write separation is to select which database to execute an SQL. As for who will select the database, there are no more than two. Either the middleware will help us or the program will do it by itself. Therefore, general ...

The implementation principle of AtomicLong is consistent with AtomicInteger, except that one is for long variables and the other is for int variables. How does the AtomicBoolean class update the boolean variable? The core method is compareandset method, and its source code is as follows: public final boolean compareAndSet(boolean expect, bool ...

Fundamentals of Java (19)—— 1, Thread safety (sync lock and monitor) 1. Primer -- thread unsafe For example, introduce a security lock: 10 stores, selling 1000 computers at the same time. The code is 10 threads competing for a resource (the code is as follows): This will cause a serious problem, that is, multiple threads will c ...