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About String's Internal Method There are 8 basic types and a more specific type of String in the JAVA language. These types provide the concept of a constant pool to make them run faster and save memory. A constant pool is similar to a cache provided at the JAVA system level. The eight basic types of constant pools are all system-coordina ...

the Java Collections Framework Reference video: [QianFeng] Java Collection Framework Details BV1zD4y1Q7Fw 0. Overview of collections Purpose: Container of object, which implements common operation on object Differences from Arrays: Array length is fixed, set length is not fixed.Arrays deliberately store base and reference types, while ...

Advanced pointer Character pointerArray pointerPointer arrayArray parameter passing and pointer parameter passingFunction pointerFunction pointer arrayPointer to array of function pointersCallback functionPointer and array analysis of interview questions Statement: This article is a note when learning the advanced C language. Learning cont ...

The first part introduces the coding specifications of some common problems in the development process, and the second part mainly introduces the better writing methods of some common problems, as shown in the figure below. 1. Guiding principles 1.1 pointer to interface There is little need for pointers to interface types. The interf ...

1, Project introduction This project is an online office system for small and medium-sized enterprises. CloudE online office system is a system used to manage daily office affairs. Specific contents: Daily various process approval, news, notice, announcement, document information, finance, personnel, expenses, assets, administration, ...

Recently, I came across a need to download the zip package, so I found the zip tool class written by others on the Internet. But I found many blogs and always found bug s. So I wrote a tool class myself. The functions of this tool class are: (1) You can compress files or folders (2) At the same time, it supports compression of multi-level folde ...

preface The notes and pictures in the article are from watching this video: Crazy God says Java 1, Definition of array An array is an ordered collection of data of the same type.Array describes several data of the same type, which are arranged and combined according to a certain order.Each of these data is called an array element, a ...

Cache module of mybatis There are L1 (enabled by default) and L2 caches in mybatis. Caching can speed up queries and reduce the number of connections to db. The cache module belongs to the basic support layer of mybatis. At org apache. ibatis. Cache package. --------org.apache.ibatis.cache -------------------------------decorators ---------- ...

When we first started learning python, we understood the coding style requirements of Python. We can see its specific description by entering import this through Python terminal.   This is the famous "python Zen". In short, it is to write python compliant code, which is concise, elegant and readable. Here are some common Python ...

1. Abnormal 1.1 abnormality (memory) Overview of exceptions An exception is an abnormal condition in the program Abnormal architecture [the external chain picture transfer fails. The source station may have an anti-theft chain mechanism. It is recommended to save the picture and upload it directly (img-EuvFnCDO-1641957293904)(img(_ exceptio ...