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brief introductionThe data structures of LinkedList and ArrayList are completely different. The bottom layer of ArrayList is the structure of array, while the bottom layer of LinkedList is the structure of linked list. It can carry out efficient insertion and removal operations. It is based on a two-way linked list structure.Overall structure d ...

Catalog 1. View the Kernel: 2. Install docker without network: (1) Turn off selinux: (2) Download the package: (3) Upload software package: (4) Decompression package: (5) Move files: (6) Script docker services: (7) Upload service scripts and authorizations: (8) System reload profile: 3. Start-up self-docker service: 4. Start the doc ...

10.1 what is a shell (1) What is Shell Shell is the medium used when the system interacts with computer hardware. It is just a tool of the systemIn fact, there is another layer between the system and computer hardware - the system kernel (1_1) record command historyThe commands we have executed in Linux will be recorded. By default, 1000 hist ...

The 20th day of learning big data - Collection and List (because you need to accompany your family for the new year, there is no time for learning to continue recording, and it will continue to be updated every day from today) Learning step by step according to the appeal map can get twice the result with half the effort aggregate The differ ...

1. Get to know MySQL When I first started learning java last year, I saw the video of crazy teacher. Now I integrate the notes I made before and publish it for your reference javaEE: Enterprise java Web Development Front end (page: display, data) Background (connection point: connect to database JDBC, connect to the front end (control ...

Using MATLAB to draw a better vector diagram The basic data unit of MATLAB is matrix. Using MATLAB, it is convenient to draw vector distribution map, such as the sampling data of air flow; Gradient of function; The normal vector of the surface, and so on. Matlab's built-in quiver and quiver3 functions can meet this demand, but the arrow ty ...

What is "high cohesion and loose coupling"?How to realize "high cohesion and loose coupling" by using Demeter's law?What code design is clearly contrary to Dimitri's law? How to reconstruct this? What is "high cohesion and loose coupling"? "High cohesion and loose coupling" is a very important design ide ...

Understanding arrays -- sparse arrays Let's talk about some recent understandings and hope to enlighten you: 1. Programs exist for the realization of functions, so in the process of learning, we should first understand the principle of function realization, and then remember the key code process; (that is, at the beginning of learning, you ca ...

ES6 modules are loaded at compile time, and the dependencies of modules can be determined at compile time. ES6 module is not an object, but the output code is explicitly specified through the export command, and then input through the import command. //ES6 module import { stat, exists, readFile } from 'fs'; The above code essentially loads t ...

The official account of WeChat: Java essays Follow to learn more about Java related technology sharing. Questions or suggestions, welcome to the official account message! Zero copy, which is a familiar term, is often mentioned in the interview of development post. Recently, after reviewing the basic principles of Netty, I went through th ...