Programmer Think

1, What is object-oriented The idea of object-oriented (OO) is very important for software development. Its concept and application have even gone beyond program design and software development, and extended to fields such as database system, interactive interface, application structure, application platform, distributed system, network manage ...

Open the official website and find the document of WebView (not supported by the simulator) Hongmeng webview's Development Guide (original link, easy to identify and click): https://developer.harmonyos.com/cn/docs/documentation/doc-guides/ui-java-component-webview-0000001092715158 2. Create a Page Ability and make the basic layout well ...

paging1. Background:Background 1: there are too many records returned by query, which is very inconvenient to view. How can we realize paging query?Background 2: there are four data items in the table. What if you only want to display the second and third data items?2. Implementation rulesPaging principle The so-called pagination display refer ...

1. Introduction to mybatis 1.1 original jdbc operation (query data) 1.2 original jdbc operation (insert data) 1.3 analysis of original jdbc operation The problems existing in the original jdbc development are as follows: ① The frequent creation and release of database connections cause a waste of system resources, which affects the sys ...

What is Spring Cloud Square When talking about Spring Cloud ecology, you must be familiar with Feign. As shown in the figure below, Feign can hide the Rest requests of the underlying (okhttp, httpclient) and pretend to be similar to the Controller of spring MVC. You don't have to splice URLs, splice parameters and other operations by yourself. ...

Factory mode effect: It realizes the separation of creator and caller Detailed classification: Simple factory mode It is used to produce any product in the same hierarchical structure (for adding new products, the existing code needs to be overwritten) Factory mode method It is used to produce fixed products with the same level struct ...

JDK source code learning 06 currenthashmap analysis The principle of CurrentHashMap is very complex. You can only record what you understand. As we all know, the thread safety implementation principle of CurrentHashMap is Synchronized+CAS. Now let's take a look. Brief reading of notes * Overview: * The main design goal of this hash table is ...

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Level 1: what is a class and how to create it Task description: This related task: create a class and an object, and call the properties and methods of the object. Programming requirements: According to the prompt, supplement the code at the beginning end of the editor on the right: Add two classes, namely, run name, String, and color, to ...

1. Character stream Causes of character stream Read English characters and numbers with byte stream No problem can be displayed normally Read Chinese characters with byte stream There may be a problem Codec How is a character stored in a computer? Based on a coding table, the corresponding integer value (coding value) is store ...