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📢📢📢📣📣📣 🌻🌻🌻 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 ...

Spring framework Demo1 --- bean Management: inject attributes into classes based on XML configuration files Normally: class demo1{ String data1="Laughing lazy cat"； } This method is often encountered when we learn Java, but this disadvantage is that the coupling degree is particularly high. It can be said that it leads the whole body. As ...

catalogue 1. Foreword 2. Realization idea 3. Coding practice 3.1 preparation 3.2 preparation of database table 3.3. User defined annotation 3.4 interceptor 3.5 interface usage 3.6 test 3.7 conclusion 4. Conclusion 1. Foreword Everyone who has studied Spring Security knows that the SpringBoot project can integrate Spring Security a ...

background Today, A new colleague in the group, Xiao A, asked me for help. It is A typical problem that newcomers are easy to make. I hereby record it. He wrote a code similar to the following package com.lingyejun.dating.chap11.toutiao; import java.util.*; import java.util.stream.Collectors; public class StreamMapCopy { public static ...

4, java collection 4.1 overview of Java collection framework On the one hand, the object-oriented language reflects things in the form of objects. In order to facilitate the operation of multiple objects, it is necessary to store objects. On the other hand, there are some disadvantages in using Array to store objects, and Java collection is ...

Java basic and important inner classes (important (anonymous inner classes)) catalogue 🐱 ‍ 🚀 Overall concept An inner class completely nested another class structure. The nested class is called inner class Internal classes are very important and difficult. They are very important and helpful for us to view the underlying source ...

Default member function of class If a class has no members, we call it an empty class. But there is not nothing in the empty class. The compiler will automatically generate six default member functions. If we implement the default member function, the compiler will not generate by default. The purpose of the default member function is to p ...

1. Character pointer What is the output of the following code? Answer: h hello the hello the Analysis: character pointer variables can store strings. The first h is because the * ps pointer points to the first character h of hello, so h is output; The last two array names, arr and ps, are the first character address of hello, so the ...

Process oriented and object-oriented design ideas Process oriented: is a programming idea. C language When solving problems, it is implemented step by step according to specific implementation steps. Process oriented, direct attention to process. eg. open the door first () Second, install elephants () Final closing () Object oriented: is ...

Java Foundation series articles - reference data types of data types Java Foundation series articles - reference data types of data types preface This blog mainly records some understanding of Java reference data types Tip: the following is the main content of this article. The following cases can be used for reference 1, Data ty ...