Programmer Group

💜 Write before 💜 Preface This blog focuses on the following points 1. Understand the basic concepts of arrays 2. Master the basic usage of arrays 3. Array and method interoperability 4. Familiar with array-related common problems and codes~ 🎄 Array Basic Usage 🎅 What is an array Arrays essentially allow us to "batch ...

Task 1 (Template Class) #include <iostream> using namespace std; // Definition of Class A class A{ public: A(int x0=0, int y0=0): x{x0}, y{y0} {} void show() const { cout << x << ", " << y << endl; } private: int x, y; }; // Definition of class B class B{ public: B(double x0, double y0): x{x0}, y{y0} {} v ...

java.util.concurrent.CyclicBarrier provides a synchronization mechanism for multiple threads to wait for each other. It can be understood as an obstacle. All threads that reach the obstacle first will be in a waiting state. All threads can continue to execute until all threads reach the obstacle. For example, the synchronization mode of Cyc ...

1 Pack 1.1 declaration of package Declaration of first level formal package: package pkg; For example, create a package named myPackage package myPackage; Rule: the directory name must strictly match the package name, as follows: In fact, the package will include many files, as follows: Declaration of multi-level package: package ...

stay Inferential construction method (I) It introduces how to obtain the candidate construction method through determineconstructors frombeanpostprocessors(). After obtaining the construction method, the next step is to infer which construction method to use and instantiate a bean according to the construction method If the candidate construct ...

Function: in short, it is a code block that encapsulates functions. Functions: 1. Structured programming is the most basic encapsulation of code, which generally organizes a piece of code according to function 2. The purpose of encapsulation is to reuse and reduce redundant code 3. The code is more concise, beautiful and readable Function def ...

Interviewer's investigation point This question is still to investigate the basic knowledge at the JVM level. The interviewer believes that only with solid basic skills can we write code with high robustness and stability. Technical knowledge involved (x.equals(y)==true). This code looks very simple, but it actually involves some underlying ...

If you have ever had to analyze problems in production, I believe you know how important it is to have a good log record. Good logging requires three things: Log messages need to provide the information needed to understand what the application is doing internally.Writing log messages must be as efficient as possible so as not to affect the ...

preface Over the past few years, I have been struggling in the it industry. Along the way, many have summarized some high-frequency interviews in the python industry. I see most of the new blood in the industry, and I still have all kinds of difficult questions for the answers to all kinds of interview questions or collection Therefore, I dev ...

Basic type packing class There are eight basic data types in Java, but these data are basic data. It becomes difficult to perform complex operations on them. What shall I do? In the actual program use, the data entered by the user on the program interface is stored in string type. In the process of program development, we need to convert t ...