Programmer Think

6.1 why use thread pool? 6.2 how to use thread pool Tool class of thread pool: Arrays: tool class for arraysCollections: tool classes for collectionsExecutors: tool class of thread pool 6.2.1 architecture description of thread pool The thread pool in Java is implemented through the Executor framework, which uses Executor, Execut ...

Configuring eclipse development environment with hadoop 1, Foreword Due to the learning needs of my junior year and the vagueness of the online tutorials, I have taken a lot of detours. Therefore, I write this blog. This article is for reference only. If there are deficiencies, I hope to point out. 2, Install eclipse 1. Download eclipse jee ...

This project is written in eclipse software. Through my own practice, it is true and effective. I hope it can help you.😘😘 Project Version: Android 5.1.1 ADT version: 23.0.6 SDK Version: 24.4.1 Run simulator: Night God simulator If there are any shortcomings or inappropriate places, you're welcome to be pointed out by the big guys Source do ...

catalogue What is a two-dimensional array? Quick start: Use of 2D arrays: Usage 1: dynamic initialization Syntax:   Case presentation: Usage 2: dynamic initialization Syntax: Usage 3: dynamic initialization - uncertain number of columns Case demonstration Requirements: use dynamic initialization to create the following two-dim ...

In this tutorial, we will learn how to create a Maven-managed Java Ethernet project in Eclipse, connect Ethernet nodes using the web3j library, make JSON-RPC API calls, and display the results. Learn in the language you are familiar with and develop in Taifang DApp: Java | Php | Python | .Net / C# | Golang | Node.JS | Flutter / Dart web3j is ...

From https://www.jianshu.com/p/9ee887e045dd , thank you 1 Finite-state machine 1.1 definition of state machine FSM (finite state machine, FSM), also known as FSM, is a mathematical model that represents finite states, their transitions and actions. Finite state machine embodies two points: first ...

MQTT It is a lightweight and flexible Internet of things message exchange and data transfer protocol, which is dedicated to achieving the balance between flexibility and hardware / network resources for IoT developers. Kotlin Kotlin is a programming language developed by JetBrains company. Kotlin is based on JVM, so developers can easily use it ...

Summary Current IoT The studio service development module provides the calling module of face recognition API in the cloud market, but there is no direct way to call the Alibaba cloud face recognition API. In this paper, the image is uploaded to the oss service from the device side, and then the image URL is passed through the uplink message, a ...

+source- Format: This is a very convenient operation that I've always recommended. For example, if you write a poorly formatted piece of code and it's messy, then you choose this one. You will find, wow~~, how my code looks beautiful all at o ...

MQTT protocol is widely used in the field of industrial Internet of things because of its low latency and high efficiency. The previous article introduced how to send MQTT message by code. Based on the previous article, this paper implements the subscription and reception of MQTT message.Operation steps: Introduce related dependencies <de ...