Programming VIP

Common methods in Enum class Full class name of enum class: Java lang.Enum First of all, we need to know that enum keyword defines enumeration classes, and enumeration classes defined with enum keyword directly inherit from Java Lang. enum class Here we will explain the three most commonly used methods in Enum class Here we will give an ex ...

📢📢📢📣📣📣 🌻🌻🌻 Hello, everyone. My name is Dream. I'm an interesting Python blogger. Please take care of me 😜😜😜 🏅🏅🏅 CSDN is a high-quality creator in Python field and is a sophomore. Welcome to find me for cooperative learning (VX wants to enter the learning exchange group or learning materials at the end of the article. Welcome ...

serialize The premise of reading and writing an object is that the object of this type is serializable Serialization of objects is simply to convert objects directly into binary data streams The deserialization of an object converts a binary data stream into an object Serialization and deserialization of objects are implemented through the JVM ...

Official Python column article 50, students stop, don't miss this article starting from 0! In the previous article, the academic committee proposed The idea of making current limiter based on Semaphore semaphore. A simple summary is: dynamic release ensures a fixed number of available semaphores at any time. We usually use semaphores like ...

Scala process control Branch control if else The if else expression in Scala actually has a return value. The specific return value depends on the last line of the code body that meets the conditions. object TestIfElse { def main(args: Array[String]): Unit = { println("input age") var age = StdIn.readInt() val res :String = if (age < ...

1, Introduction 1. Characteristics MyBatis is a semi-automatic ORM framework. MyBatis-Plus (MP for short) yes MyBatis On the basis of MyBatis, the enhancement tool is only enhanced without change, and is born to simplify development and improve efficiency. [tip] the version used in this article is 3.1.1 2. Characteristics 1) No invasion ...

Programmers want to create command-line programs for the following reasons: 1. Create scripts for that can be run automatically on a regular basis. 2. To create a script that interacts with files in the system. 3. To create scripts that can perform system maintenance tasks. 4. To avoid the unnecessary overhead of designing graphical user in ...

Implement a simple student management system from 0 to 1 with a console Needs Analysis: You need to use the console to implement a student management system, run the program into the management system, and input the corresponding operands to achieve the corresponding functions. Functions include adding student information, viewing student inf ...

File operation (IO Technology) A complete program generally includes data storage and reading; The program data we wrote earlier is not actually stored, so the data disappears after the python interpreter executes. In actual development, we often need to read data from external storage media (hard disk, optical disc, U SB flash disk, etc.), or ...

Concept and operation of binary search tree The concept of binary search tree Binary search tree is also called binary sort tree. If its left subtree is not empty, the value of all nodes on the left subtree is less than that of the root node; If its right subtree is not empty, the value of all nodes on the right subtree is greater than th ...