Programming VIP

Add: omit some questions. Here I think the questions that need to be posted are posted by me. The answers are different. You are welcome to express your views. I'll start with a brick to attract jade. Of course, the questions here are incomplete, and they will be supplemented in the follow-up. 2940. Byte string and string conversion descri ...

Detailed explanation of multithreading summary Core concept Threads are independent execution pathsWhen the program is running, there will be multiple threads in the background, such as main thread and gc thread, even if there is no thread created by itselfmain() is called the main thread, which is the entry of the system and is used to exec ...

generic paradigm A generic type is actually a type parameter used to specify a type. In order to count students' scores, it is required to design a Score object, including course name, course number and course Score. However, there are two kinds of scores: one is to take excellent, good and qualified as the result, and the other is to use dig ...

Library management system is a common small project in learning programming. After learning classes and objects, encapsulation, inheritance, polymorphism and interfaces, we can use these ideas to realize our library management system. Here I will use two blogs to explain the specific implementation methods. According to the first two blogs, we ...

1. Which of the following cannot be used to handle thread safety synchronized keywordvolatile keywordLock classtransient keyword Correct answer D answer analysis Let's take a look at the function of the transient keyword The variable cannot be serialized Variables modified by transient cannot be serialized Cannot be read after deserialization ...

Threads and processes 1, What is a process / thread 1. Introduction As we all know, CPU is the core of computer, which undertakes all computing tasks. The operating system is the manager of the computer and a big housekeeper. It is responsible for task scheduling, resource allocation and management, and commands the whole computer hardwa ...

Detailed explanation of JVM virtual machine (class II) loading subsystem 1. Overview of memory structure 💡 Note: only the HotSpot virtual machine is available in the method area, but neither J9 nor JRockit 2. Class loader subsystem Functions of class loader subsystem: The class loader subsystem is responsible for loading class ...

Why is there a function? At first glance, this problem is a bit SB. The function must be written for use, but can't I implement my steps step by step to realize the function? Yes, but on the one hand, it will cause code redundancy and heavy workload. On the other hand, it is unsightly and concise. In my opinion, function is to extract the ...

Parameter verification Business rule verification Code practice Custom annotation Implement business verification rules use test Summary In daily interface development, in order to ensure the stability and security of the interface, we generally need to deal with two kinds of verification in the interface logic: Parameter verif ...

4 STL function object 4.1 function object 4.1.1 function object concept Concept: A class that overloads the function call operator. Its object is often called a function objectWhen a function object uses overloaded (), its behavior is similar to that of a function call, which is also called an imitation function Essence: A function object ...