C language notes
Chapter III data types of C language 3.1 variables and constants constant The amount that does not occupy memory and its value cannot be changed when the program is running. When the program is running, it appears directly in various registers of the arithmetic unit as an operation object variaUTF-8...
Posted by esport on Sat, 23 Oct 2021 08:35:52 +0530
wait in Java multithreading series
preface We know that in addition to calling the sleep method, the join method and the wait method for thread blocking, the first two belong to the tree method, and wait belongs to the Object method. Let's talk about the use of wait today. Let's take a look at the three overloaded methods of waiUTF-8...
Posted by donald on Sat, 23 Oct 2021 09:51:31 +0530
RocketMQ batch message introduction and introduction demo and how to solve the problem when the message exceeds the limit
introduce Batch message refers to combining multiple small messages into one batch message and sending it at one time. This has the advantage of reducing network IO and improving throughput. For example, I originally had three messages. If three messages were sent three times, I would go througUTF-8...
Posted by sig on Sat, 23 Oct 2021 12:35:30 +0530
Python 3 function variable input parameters
Usually, when we define a function in python, we need to give clear function input parameters. For example, for a mathematical function z=f(x,y), Z is a function about X and y. However, for functions with unknown parameters, for example, the function form can be z=f(x,y), but it can also be z=fUTF-8...
Posted by psytae on Sat, 23 Oct 2021 12:36:02 +0530
C + + classes and objects: operator overloading - +, <++
Operator overloading concept: redefine the existing operators and give them another function to adapt to different data types; Plus operator overload Function: add two user-defined data types; In this case, you need to define the member function overload + sign or the global function overload +UTF-8...
Posted by lucasrd on Sat, 23 Oct 2021 13:20:31 +0530
2021-10-23 getting started with Java 3
Java Foundation 1, Notes Single-Line Comments multiline comment Documentation Comments public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World"); //Output - single line comments /* multiline comment */ //Documentation Comments /** * @Author */ } } 2, IUTF-8...
Posted by tvance929 on Sat, 23 Oct 2021 15:39:48 +0530
Source code analysis of ConcurrentHashMap 1.7
Principle of ConcurrentHashMap 1.7 Since Unsafe is involved in the source code, let's explain it first Introduction to Unsafe 1. Introduction to Unsafe Unsafe class is equivalent to a backdoor class in java language. It provides hardware level atomic operations, so it is widely used in some conUTF-8...
Posted by God Ownz on Sat, 23 Oct 2021 15:48:23 +0530
[update from time to time] classic Java topics (10.21)
This blog is some topics that bloggers have done in the process of learning Java language. It is gathered here to share with you and will be updated from time to time. You can learn together and make progress together! 1. Find the larger of two numbers Enter two integers a and b, find the largeUTF-8...
Posted by PHPLRNR on Sat, 23 Oct 2021 16:39:44 +0530
Several situations in java where classes will not be initialized
As we all know, class initialization is performed after the class is connected. The life cycle of the class is shown in the following figure: Initialization is the process of executing the clinit() method of the class constructor. clinit() method is generated by the compiler automatically colleUTF-8...
Posted by cloudzilla on Sat, 23 Oct 2021 17:53:27 +0530
C# reads Excel and Csv files, coexists in DataTable, and then puts them into array
C # reads Excel and Csv files, coexists in DataTable, and finally puts them into array for calculation Absrtact: This paper introduces the method of C# reading Excel (. Xlsx. XLS) and Csv(.CSV) files, saving them in DataTable, and then putting them into the array. You can do things in the arrayUTF-8...
Posted by Sekka on Sat, 23 Oct 2021 20:19:20 +0530