Java
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java – Float. Equals is completely useless. What should I use?
in consideration of: > == should never be used to compare doubles/floats > it appears from the docs that (beyond…… -
Java – synchronization, volatile and thread safety
I'm reading some books about Java concurrency recently With regard to thread safety, if you cannot make a class immuta…… -
Java – it is better to have a caching mechanism inside or outside the factory class?
My problem is not strictly language - related, it's more like a general programming concept If I have a factory class …… -
Java – where can I find Proguard. Java in my project cfg？
I want to enable Proguard for my application in this document @ L_ 301_ 0 @, it says that the Proguard that I have to …… -
When programming with Java / kotlin, it is recommended to use tail recursive or iterative version? Is there any difference in performance?
I try to learn good habits in programming, and I stick to this problem I know that in Java, recursive functions can be…… -
Java – embedded jetty: select an existing spring MVC controller
context I work on a web application (using the play framework), and I'm trying to migrate to the traditional servlet m…… -
Java – how to create acceptance tests for asynchronous microservices
If I have a microservice, it should create users. However, because user creation is very complex, it uses queues. User…… -
Java – mockito. In easymock What is the analogy of spy / doreturn?
Imagine that I have the following courses: public class TestClass { public class Index<X> { } publi…… -
Java EE – was remote container and arquillian on @ persistencecontext
For our integration testing, I want to use arquillian and follow all the steps in the "Getting Started tutorial" Becau…… -
Why Java util. The value of the calendar object will change after calling get (int)
I try to debug problems in some legacy code. I have narrowed the problem down to the following methods: public String …… -
Java – stay away from children: protected fields cannot be deleted from inheritance
In the spirit of well - designed OO, a category I have extended has marked that one of these areas has been protected …… -
Java 8 interface with default method invalid method when Jacobo is enabled
We have an interface that uses default methods. We implement this interface in Java and kotlin classes, and we provide…… -
Can I use azure table storage for conditional insertion
Can I use windows azure table storage service for conditional insertion? Basically, what I want to do is insert new ro…… -
Multithreading – how to execute QObject:: movetothread() when qthreadpool is used?
I'm building a small multithreaded web server Qtcpsockets are obtained in the main thread, and then passed to qtthread…… -
Unexpected sequence error in Java compilation
When solving challenges online, I found the following behavior of Java, which I found a little strange I started with …… -
Java – can I dynamically load other spring configuration files into an existing web application context?
In Tomcat 6.0 After starting my webapp in 18, I just use what is needed to initialize the system to boot spring - that…… -
Java – how to correctly use JTI to declare JWT to prevent replay attacks?
I created some rest APIs using spring and implemented spring security using JWT for authentication My front end runs a…… -
Java – get screenshot of StartMenu
I'm using BitBlt to capture a window If aviation theme is enabled, the background of the captured image is black If I …… -
Java – set httpparams object in httpclient 4.0
I'm creating a new httpclient by passing threadsafeclientconnmanager and httpparams in its constructor, but it always …… -
If the variable modified by the thread is marked volatile, why false sharing problem
I've been reading Martin Thompson's article This is an explanation of false sharing http://mechanical-sympathy.blogspo…… -
Enumerations disassembled with javap do not display constructor parameters
When I disassemble enumeration with javap, the implicit constructor parameter of enumeration seems to be missing. I ca…… -
Java – how to format strings using properties in beans
I want to create a string using the format and replace some tags in the format with properties in the bean Is there a …… -
Drag multiple button views in Java
I have an application where I need a button to move the stack (like moving part of a pile of cards from one pile to an…… -
Random chaos probability in Java (or any language)
See English answers > what distribution do you get from this broken random shuffle? 10 for(int i = 0; i < N; i++…… -
Java – hibernate annotations compilation error
When I tried to compile a dto file with hibernate annotations to map to DB, I encountered a strange problem When it fa…… -
Java – we put servlets in Tomcat’s directory structure?
I copied a helloservlet application from the web and put it in the root folder Solution This document can help you htt…… -
Why are there so many versions of Java that are different from c#?
I decided to learn another language and was in the picking stage At present, we are studying Java and C #, but because…… -
NetBeans (Java Swing): setting the window size
It really drives me crazy When I set the appropriate size for my window in design mode, it just ignores this size and …… -
Explanation of Java generic getthis technique
I'm reading about Java genetics. I'm a little confused when I encounter this topic come from: http://www.angelikalange…… -
Java – how do I detect which program plays sound on Windows 7?
I'm trying to write a small background program that will prevent music from playing Winamp. Com when another program p…… -
Java – Jenkins build blocked “option Code: 65002”
My Jenkins can't build our project. This is the log: Jenkins is fully up and running déc. 02,2014 12:34:35 PM Infos hu…… -
How to use java calendar to check whether today is Sunday
I wrote a few lines of code that didn't work Why? Can you explain something? Calendar date = Calendar.getInstance(); ……