Quickly understand the content of BIO and NIO threads in Java. It's enough to read this article

In this article, I want to complete the basic notes of the network programming model supported by Java, so that I and you can understand the I/O mode of network programming supported by Java. Introduction (small stove) Speaking of network programming, let's first understand the I/O modes of network programming supported by Java: BIO, NIO, and ...

Posted by richblend on Fri, 05 Nov 2021 15:16:24 -0700

Image theme color extraction algorithm

Median segmentation In RGB color space, the three primary colors R, G and B correspond to three coordinate axes of the space, and each coordinate axis is quantized to 0-255. 0 corresponds to all black and 255 corresponds to all white. In this way, a color cube with 256 sides is formed, and all possible colors correspond to a point on the c ...

Posted by Mark.P.W on Fri, 05 Nov 2021 14:47:49 -0700

Cf17e palisation problem solution

Description Luogu portal Solution A very interesting question. When you see the palindrome substring, you first think of the manacher algorithm. emm... But what to do after writing manacher? We find that finding intersecting palindrome substrings is very troublesome, so the direct wave is positive and difficult, and the disjoint is subtracted ...

Posted by Bjblatz on Fri, 05 Nov 2021 14:45:46 -0700

Web API learning notes day05, 06, 07

1.offset series Offset, offset, can only be obtained and cannot be changed offsetTop: returns the offset (Y-axis size) of the element above the parent element with positioning. If not, it is the distance to the bodyoffsetLeft: returns the offset (Y-axis size) of the element from the left border of the positioned parent element. If not, it is ...

Posted by zorgon on Fri, 05 Nov 2021 14:43:09 -0700

Java Se and objects

        As we all know, C language is process oriented. It focuses on the process of the problem, analyzes the steps of solving the problem, and gradually solves the problem through function call. Java is based on object-oriented, which focuses on objects, that is, the main body involved in completing a thing, splitting a th ...

Posted by Jessup on Fri, 05 Nov 2021 14:39:08 -0700

Font reading and display of dot matrix Chinese characters

1, Chinese character dot matrix library 1. Chinese character coding 1.1 location code It is stipulated in the national standard GD2312-80 that all national standard Chinese characters and symbols are allocated in a square matrix with 94 rows and 94 columnsEach row of the square array is called a "zone"Each column is called a ...

Posted by quizzical on Fri, 05 Nov 2021 13:49:39 -0700

Chapter III summary

3.1 cited examples [example 3.1] calculate the Celsius temperature corresponding to the Fahrenheit temperature of 100 ° F. Calculation formula:                            c= Where: represents the temperature in Celsius and f represents the temperature in Fahrenheit. #include<stdio.h> int main(void) { /*Define 2 integer variables. ...

Posted by olivarespablo on Fri, 05 Nov 2021 13:47:32 -0700

Dynamic memory management (heap)

catalogue Why is there dynamic memory management How to manage space? Introduction to dynamic memory functions malloc and free calloc ​ realloc Common dynamic memory errors Written test questions Flexible array   Use of flexible arrays Advantages of flexible arrays Why is there dynamic memory management 1. You can a ...

Posted by seaten on Fri, 05 Nov 2021 13:30:55 -0700

Database Experiment 3: basic SQL operation of database

(31) create a view of information department student information create view IS_Student as select * from student where sdept = 'IS'; (32) query students younger than 20 years old in the student view of the information department select * from IS_Student where Sage < 20; (33) delete all course selection records of Ma Chaoyang delete f ...

Posted by buceta on Fri, 05 Nov 2021 13:18:46 -0700

Data structure -- queue

Article catalog Article catalog 1, What is the queue? 2, Code implementation 1. Storage structure 2. Common interface functions 2.1 initialization and destruction 2.2 insertion and ejection 2.3 other interfaces summary ​​​​​​ 1, What is the queue?         Queue is also a linear table with the characteristic of ...

Posted by mclordgt on Fri, 05 Nov 2021 13:05:42 -0700