包含标签：Java 的文章
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JDBC of Java ①
JDBC tool preparation: MySQL (database), MyEclipse (development tool), Navicat (database management tool) JDBC program…… -
Detailed explanation of internal classes of Java
Preface A little classmate asked me to write a summary of this. I said, well, let's write and summarize the knowledge …… -
Summary of vector and stack source code analysis / list collection
Preface This article is the last one of the collections under the list interface. The ArrayList and LinkedList have be…… -
Java Web (XIII) send mail using JavaMail (QQ, 163, Sina mailbox server)
Come on, come on. --WZY 1、 Principle of sending mail Before you know how it w…… -
Java Web (I) servlet details!!
This article is a little far from the last one. It's been about two months. I spent a year at home. Ha ha ~ now start …… -
HashSet source code details
Preface After writing the HashMap article, it took several days to continue this series of articles. Because there are…… -
Code implementation of Java Web (IV) one-time verification code
In fact, the logic of the implementation code is very simple, really super simple. 1. Log in on the login page JSP use…… -
An overview of the collections collection.
Preface I feel very confused when I suddenly encounter the interview questions about sets, so I specially summarize so…… -
Java Web (VII) JSTL tag library
Previously, we learned that in order not to use scripts on JSP pages, we have built-in behaviors and behaviors in JSP,…… -
Java container
The container collection interface defines methods to access a set of objects, Its sub interfaces set and list respect…… -
The insert method of mybatis plus has the problem of – ID ‘doesn’t have a default value
If this problem occurs, just set the corresponding field annotation to, for example: This error can be solved. -
Markdown syntax details
Markdown learning Markdown Download title Tertiary title Four level title typeface Hello,World! Hello,World! Hello,Wor…… -
Common windows and DOS
Windows common shortcuts Keyboard function keys Tab, shift, Ctrl, alt, space, enter, window, |, ↑↓←→ Keyboard shortcut…… -
Idea creates the first Java program
IDEA Download and install https://www.jetbrains.com Chinese package https://www.jb51.net/softs/598478.html#downintro2 …… -
Lesson 1: Java environment construction
Java environment construction Java features and benefits Three versions of Java JDK、JRE、JVM Install development envi…… -
Implementation principle of LinkedList
This article was written by the author of blog Park: Yicun Hui, personal blog address: https://www.cnblogs.com/zsql/ J…… -
Java object-oriented explanation
#############Java object-oriented explanation ################# 1. Basic object-oriented concepts 2. Classes and objec…… -
Java multithreading and concurrency (Fundamentals)
1、 Process and thread Process: it is a running activity of code on the data set. It is the basic unit for resource al…… -
Still don’t understand the colleague code? Fill in a wave of Java 7 syntax features
preface It has been more than 20 years since the emergence of Java platform. During these 20 years, Java has always be…… -
Introduction to new features of Java 12, come and make up
Java 12 was released as early as March 19, 2019. It is not a long-term support (LTS) version. Before that, we have int…… -
The difference between throw and throws and the order in which try, catch and finally are executed with return
1、 There are three forms of throwing exceptions. One is throw, the other is throws, and the other is that the system …… -
Four traversals of map
//Four traversal methods of map //Map cannot be traversed directly, but only indirectly by traversing key and value pu…… -
The most user-friendly explanation of the new features of Java 10
Since the beginning of Java 9, Oracle has adjusted the release strategy of the Java version. Instead of a large versio…… -
Java learning summary – array creation and parameter transfer
（1） Array creation The creation of array includes two parts: the declaration of array and the allocation of memory s…… -
Find the largest common substring from the two strings
The method to find the largest common substring (comstring) from the two strings (str_1, str_2) is as follows: Example…… -
Java ThreadLocal parsing
brief introduction ThreadLocal is similar to local variables. It solves the problem that a single thread maintains the…… -
Wait / notify mechanism for Java concurrency
1 Preface This article assumes that you have a certain understanding of synchronized and reentrantlock. 1.1 let's rela…… -
Java static keyword explanation
introduction There is a passage in Java programming thought: static method is a method without this. Non static method…… -
What is the difference between using synchronized to decorate static methods and non static methods
preface Recently, I was asked this question, and the first answer was also very bad. Here, I refer to the online answe…… -
Java error: Java math. BigDecimal cannot be cast to java. lang.String
Take a number from the database and turn it into a string. An error is reported: Java math. BigDecimal cannot be cast …… -
Summary of shallow copy and deep copy of Java
Object copy in Java refers to copying all attributes (member variables) of an object to another object with the same c…… -
Maven project tip: the source value of 1.5 is outdated and will be deleted in future releases
This is because the Maven project compiles using jdk1.0 by default 5。 We can make the following configuration in the ……