Programmer Group

Inner class General learning objectives of common classes Inner classObject classCommon methods of Object classPackagingString classBigDecimal class Inner class classification Member inner classStatic inner classLocal inner classAnonymous Inner Class concept Define a complete class inside a class characteristic: After compilation, an ...

1, Basic concept of graph   Graph - graph G is composed of two sets V(G) and E(G), marked as G=(V,E), where V(G) is a non empty finite set of vertices,   E(G) is a finite set of edges, and edges are disordered or ordered pairs of vertices. Graph cannot be empty 1. Terms and definitions of drawings 1) Directed graph If E is a finite s ...

2021SC@SDUSC     in my previous blogs, I learned and introduced the models and algorithms used in the direction classifier of paddeocr. Today's blog will learn the real function and algorithm implementation framework of the direction classifier.    after the text detection of the picture, the possible text parts in the pictu ...

The scope in Spring is a. The default value, singleton, represents a single instance object: When the scope of a bean is set to singleton, there will only be one shared bean instance in the Spring IOC container, and all requests for a bean will only return the same instance of the bean as long as the id matches the bean definition. In other ...

preface This module is close to the boundary of C language and takes some time to learn. However, when we know this knowledge, we can see more than the appearance in the function of C language, and we can really understand how the function is called. However, my ability is limited. If the following knowledge is inappropriate, please correct it ...

Database programming (JDBC) 1. Database programming: JDBC JDBC, namely Java Database Connectivity. Is a Java API for executing SQL statements. It is a database connection specification in Java. This API is composed of some classes and interfaces in java.sql. Javax.sql. Package. It provides a standard API for Java developers to operate ...

Strange usage of C in word2vec 1. malloc() and calloc() Both malloc() and calloc() functions can be used to dynamically allocate memory space, but they are slightly different. malloc() function has one parameter, that is, the size of memory space to be allocated: void *malloc(size_t size); The calloc() function has two parameters: ...

  Zero, write in front          This series is not updated frequently. It's interesting to see today's topic. Let's have a look. The main knowledge points are [question 04] given a and b, ask whether a can be divided by b. The Application of if statement and conditional operatorhttps://blog.csdn.ne ...

preface Learn more about Spring. Tip: the following is the main content of this article. BeanDefinition What is BeanDefinition BeanDefinition represents a Bean definitionSpring creates Bean objects based on the BeanDefinitionBeanDefinition has many properties to describe a BeanBeanDefinition is a very core concept in Spring Import ...

Metaclass Everything in python is an object, so the class you define must also be an object, which is instantiated by a class. This tired class is called metaclass. How to find metaclass class People: def __init__(self,name,age): self.name=name self.age=age print(type(People)) # The result is < class' type '>, which proves that Peo ...