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Article directory Ch.III Java basic programming structure: Java String API: 3.7 basic input and output: Read input: Format output: File I / O: File input: File output: 3.8 control process: 3.9 large value: 3.10 array: Initialization of array: Fast output of array: Array copy: Array sort: 2D arr ...

Interface and polymorphism Article directory Interface and polymorphism Interface Interface Overview Characteristics of the interface Inheritance and implementation of interface Application of interface Features of interface in jdk1.8 Benefits of using interfaces The difference between interface ...

1, Purpose of the experiment 1. Master the basic syntax and function of Arcpy 2. Learn to use Arcpy custom GIS toolbox 3. Spatial interpolation with arcpy 4. Customize the Arcmap mapping template created, and use arcpy to adjust the location of legend, annotation, scale, etc 2, Experiment content 1. The ...

I. annotations 1. What is built-in annotation (1) Add @ SuppressWarnings to the front of the program to remove warnings in javac compilation -- stage is SOURCE (2) @ Deprecated package with tag, method, field description obsolete -- stage is SOURCE (3) Mark @ excessive to indicate that the method overrides the method of the parent class -- sta ...

Date Time Object There are two types of operations on date and time: Conversion: Conversion from string to timestamp Calculate: Calculate the interval between two time points, the time point and the time period (Calculate next week N, next month D, last M month D, etc.) Java8 provides three classes: ...

Declarative Transactional Transactional for the SpringBoot series of tutorials When we want a set of operations to succeed or fail, we tend to consider using transactions to achieve this; the db operation described earlier, mainly on a single-table CURD, focuses on the use of declarative transactions@Transactional s <!-- more --> I. Co ...

brief introduction Introduction to the previous article cobra Mentioned when viper Today, let's talk about this library. viper is a configuration solution with rich features: Supports configuration files in various formats, such as JSON/TOML/YAML/HCL/envfile/Java properties; You can set up to listen for changes to configuration files and autom ...

Operator '= =' and object's equals() method brief introduction The operator "= =" compares whether the two operands are equal. The two operands can be either basic type or reference type. For example > int a1=1,a2=3; > boolean b1=a1==a2;//The operand of "= =" is of basic ...

Preface Based on the Server side of BIO implementation, how many threads will there be when 100 connections are established? How many threads will there be based on NIO? BIO The so-called BIO is the most traditional socket link, for example: int port = 4343; //Port number // Socket server (simple sending information) Thread sThread = new Thread ...

Experimental target A preliminary model of user management module of archives management system is realized. Functions include: login interface of password mechanism; query and modification of ordinary users' own information; addition, deletion and modification of other users' information by administr ...