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Articles Catalogue Concurrent programming Thread Foundation Thread group Atomics JMM (Java Memory Model) Lock mechanism Synchronization strategy Blocking queue Actuator Concurrent programming Concurrent programming mainly involves multi-process and multi-threaded programming, while java usually ...

How to use java data structure to write code Array data structure Initialization of arrays public static void main(String[] args) { int[] arrays = new int[5]; // Define and open up an array of length 3 // You can write the above code in two sentences int[] array = null; // Declare a variabl ...

Preface When you mention String in Java, you always mention that String is immutable.But is this true?Can String's immutability be destroyed? Before validating, you need to first introduce the immutable properties of String. PS: Also mention the interview questions you have encountered here: String str = "abc"; // Output def System.out.printl ...

Foreword: The meaning of Annotation in Chinese. Java annotations are used to provide metadata for Java code. Metadata refers to the data used to describe data, which, in general, describes the relationship between codes or the internal relationship between codes and other resources (such as database tables). In some technical frameworks, such ...

Reflection 1. Introduction to Reflection JAVA reflection mechanism is that all attributes and methods of this class can be known for any entity class in running state; any method and attributes can be invoked and modified for any object; this function of dynamic acquisition of information and dynamic in ...

In this section, we will explore the Atomic types in concurrent packages. AtomicXXX and XXXAdder and XXXAccumulator performance tests Start with a performance test that compares AtomicLong (out of 1.5), LongAdder (out of 1.8), and LongAccumulator (out of 1.8) for simple cumulative performance. The logic of the program is simple, you can see tha ...

There are several implementations of multithreading, which are they? a, inherit the Thread class b. Implementing Runnable Interface c. Implementing Callable Interface through Thread Pool   Thread pool, in fact, is a container containing multiple threads, in which threads can be used repeatedly, ...

Reuse container name But when we write / debug Dockerfile, we often repeat previous command s, such as docker run --name jstorm-zookeeper zookeeper:3.4, and then the container name conflicts. $ docker run --name jstorm-zookeeper zookeeper:3.4 ... $ docker run --name jstorm-zookeeper zookeeper:3.4 docker: Error response from daemon: Conflict. Th ...

Spring provides several marker interface s that alter the behavior of beans in containers; they include InitializingBean and Disposable bean.The beans implementing both interfaces invoke the lattPropertiesSet() method of the former and the destroy() method of the latter when initializing and destructing. In modern Spring applications, The J ...

JAVA Thread Pool Details Description: Based on JDK 1.7.0.79 Why use thread pools instead of displaying create threads Reduce the time spent creating and destroying threads and the overhead of system resources to resolve resource shortages; The absence of a thread pool can cause the system to create a large number of similar threads, lead ...