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Introduction to javadoc specification

We know that javadoc is embedded in the JDK, so following the javadoc specification is definitely the orthodoxy of java annotations. It is very practical to have javadoc to help generate API documentation.

Jan 25, 2021 am 09:49 AM

javadoc 规范

Java implements the function of sending verification code SMS

Java introductory tutorial: This article shares with you the Java code that implements the function of sending verification code text messages. It has certain reference value and I hope it can be helpful to everyone.

Jan 20, 2021 am 09:52 AM

java 验证码短信

How many bytes does the char type occupy?

In Java, the char type occupies 2 bytes; reason: The Java compiler uses Unicode encoding by default, so 2 bytes (16 bits) can represent all characters. In Java, short and char occupy 2 bytes; byte and boolean occupy 1 byte, and int and float occupy 4 bytes.

Jan 18, 2021 pm 01:51 PM

java char类型字节

What are the eight basic data types in java

The eight basic data types in Java are: 1. byte; 2. short; 3. int; 4. long; 5. float; 6. double; 7. char; 8. boolean.

Jan 15, 2021 pm 03:04 PM

java 基本数据类型

Java interview - talk about the methods of inter-process communication

Pipes are a half-duplex communication method. Data can only flow in one direction and can only be used between processes that are related. Process affinity usually refers to the parent-child process relationship.

Jan 15, 2021 am 10:50 AM

java 面试进程

Use java to determine the position where a character first appears

This article introduces the method of using Java to determine the position where a character first appears. It has certain reference value and I hope it can be helpful to everyone.

Jan 15, 2021 am 10:22 AM

java 字符位置

Java implements addition, deletion, query and modification of sequence table

The sequence table is a linear structure that is stored sequentially in a segment of storage units with continuous physical addresses. Generally, array storage is used. Complete the addition, deletion, checking and modification of data on the array.

Jan 11, 2021 am 09:43 AM

java 顺序表

Why does Java need to rewrite hashcode when rewriting equals?

Java introductory tutorial: Rewriting equals does not necessarily require hashcode, it depends on the actual situation. For example, it is not necessary when a container is not used, but if a container such as HashMap is used, and a custom object is used as the Key, it must be rewritten.

Jan 08, 2021 am 10:22 AM

java equals hashcode

Java implements the operation of removing elements from a linked list

Implementation ideas: One is based on sentinel nodes, and the other is based on java collections. The essence is still the same.

Jan 04, 2021 am 11:54 AM

java 链表元素

What are the java operators?

Java operators include: 1. Arithmetic operators, such as "+, -, %, etc."; 2. Assignment operators, such as "="; 3. Comparison operators, such as "greater than, equal to, not equal to"; 4. Logical operators, such as "OR, AND, NOT"; 5. Conditional operators, such as "ternary operator" and so on.

Dec 30, 2020 am 11:04 AM

java运算符

How to further optimize after implementing insertion sort in java

Java introductory tutorial: This article introduces the method of further optimization after insert sorting in Java. It has certain reference value and I hope it can be helpful to everyone.

Dec 29, 2020 am 10:12 AM

java 插入排序

Java uses Jsoup library to crawl weather

Specific methods: 1. Download the Jsoup core library; 2. Add the jar package; 3. Right-click the jar package and select Build Path——>Add to. If the corresponding jar package appears in Referenced Libraries, the loading is successful.

Dec 24, 2020 am 09:50 AM

java Jsoup 天气