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
Added by LeslieHart on Tue, 01 Mar 2022 18:14:43 +0200
Detailed explanation of multithreading
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 ...
Added by vinoindiamca on Tue, 01 Mar 2022 13:21:07 +0200
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 ...
Added by saami123 on Tue, 01 Mar 2022 12:45:50 +0200
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 ...
Added by bad_goose on Tue, 01 Mar 2022 12:39:36 +0200
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 ...
Added by Gregghawes on Tue, 01 Mar 2022 09:18:21 +0200
Threads and processes
1, What is a process / thread
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 ...
Added by DChiuch on Tue, 01 Mar 2022 09:07:12 +0200
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 ...
Added by jmarcv on Tue, 01 Mar 2022 08:35:56 +0200
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 ...
Added by WebGeek182 on Tue, 01 Mar 2022 08:28:55 +0200
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 ...
Added by Tylor_Famous on Tue, 01 Mar 2022 07:46:08 +0200
4 STL function object
4.1 function object
4.1.1 function object 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
A function object ...
Added by CodeMama on Tue, 01 Mar 2022 07:30:32 +0200