Recent Posts
-
Error prompt configure your build for vectordrawablecompat when using Huanxin development project
Problem Description: when using Android studio to develop a project, after rewriting the chat interface with Huanxin, …… -
Modify the (basic type) parameters in JNI and return to the Java layer for use
Recently, I encountered a problem in JNI related projects: pass in multiple int type parameters in the Java layer, and…… -
The difference between using thread thread and asynctask asynchronous task in Android
Recently, when I talked with several friends about the network download problem in Android development, I talked about…… -
Talk about the pitfalls of Android 6.0 dynamic permission application
During the day, I was doing the adaptation of the sdk23 version and encountered many pits. Now I take the time to writ…… -
Recyclerview is one of the solutions to incomplete text display when nesting textview
First describe this bug: when a simple textview nested recyclerview is used as an ItemView, the layout may be overwrit…… -
Cause analysis of network disconnection and reconnection collapse of csipim
Operation flow after disconnection and reconnection Make a call ->Call sipservice. Makecalloptions(), restart sipse…… -
String what is the maximum length of a string?
In the process of learning and development, we often discuss the value range of basic data types such as short, int an…… -
-
Arrays. Precautions for using sort()
Arrays. Precautions for using sort() Thanks to the big guys in leetcode, learn from each other and come on! -
Java Data Formatting & retain the specified number of digits after the decimal point
DecimalFormat NumberFormat Formatter String. format printf() Construction method Specific examples matters needing att…… -
Use of Java comparator comparingint()
comparingInt Custom sorting parameters Priority queue, override comparator -
Java course practice – student information management system
In 2020, the comprehensive course practice of Java & data structure was conducted. Due to the lack of ability, it …… -
ACM essential fast input / output (Java)
Handwriting input class BufferedReader StringTokenizer Static input method StreamTokenizer -
Java hand tear HashMap
HashMap Relationship between hashcode and equals Override hashcode and equals methods Iterator for map Map. Entry< …… -
Java Arrays. Lightning protection for aslist()
Arrays. asList() Quick create list Create using java8 stream -
-
Foreach () and iterator in Java and those things that enhance the for loop
List. forEach() Example The underlying implementation of foreach() Summary Iterator Introduction to iterators Iterator…… -
I / O input / output & redirection in Java
FileReader FileInputStream PrintStream OutputStreamWriter ObjectOutputStream Redirect -
com. sun. org. apache. xerces. internal. impl. io. Malformedbytesequenceexception: invalid byte 1 of UTF-8 sequence of 1 byte.
Try to modify the mapper registration method 一、具体到xml文件 <mappers> <mapper resource="code/dwx/mapper/…… -
Simple use of eclipse tools
preface Although it's better to write java with idea, I still have to keep pace with my teacher when I'm in college. H…… -
Apache HTTP server and Tomcat integration learning record
preface In fact, there are many tutorials on the Internet, but the problem is that it is difficult to find one with hi…… -
Simple understanding of JAVA memory partition
Java's memory is divided into five parts So what are the five parts? Follow me down! Introduction: each program needs …… -
Some problems about < packaging > in maven
1、 Packaging type of the project jar Default packaging format war Packaged into projects to be deployed pom The paren…… -
The idea compiler reports content of collection are updated, but never queried on variables
background I haven't seen you for a long time. When I write java with idea and declare HashMap, it turns yellow becaus…… -
JDBC learning (I)
JDBC learning (I) concept The so-called English abbreviation means: Java database connectivity, that is, the connectio…… -
A simple understanding of memory in Java
1、 JAVA memory partitioning It is divided into five parts. You can refer to this note for a brief understanding: http…… -
A small problem with Vue
NetWork Error 1. The first case It is a common cross domain request error. At this time, you only need to add the "@ c…… -
Map and set about iteration
We have learned about the following complex data structures: But this is not enough to deal with the reality. This is …… -
Nginx common commands
Windows View help information Nginx -h View nginx Version (lowercase V) Nginx -v In addition to version information,…… -
Some differences between web and game development
preface Recently, due to preparing for the final exam and preparing for internship. In fact, I haven't written a blog …… -
Java basic syntax (2) – basic data types
preface You can directly copy other people's notes, only do typesetting and combing, and you may add your own opinions…… -
NPM management command
We can easily download JS library and manage front-end projects through NPM. Node. JS the location of the NPM package ……