Java
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Java – log4j2: the location where the log4jcontextselector system property is set for asynchronous logging
I tried to set asynchronous logging in the rest web method currently running in the free profile server (for performan…… -
Select a Java Web Framework 2011
My question is based on the following question: choosing a java web framework now? The reason for my problem is that a…… -
How to make indexof case insensitive in Java
I have a simple question How to use @ L_ 419_ Make indexof case insensitive in 0 @ This question has been answered in …… -
Java: the reference to static context is similar to class self reference ‘this’, which is often used as the coding style
As mentioned in Python, I have been using class self - reference since the recent beginning of Java, whether it is man…… -
How do I find infinite loops in Java Web applications?
One day, the CPU utilization of our Java Web application reached 100% We try to find the problem by using kill - quit …… -
What methods can represent weighted directed graphs in Java?
I can't use any external libraries, so I try to think of some ways to build my own data structure I was thinking maybe…… -
Java EE – why are stateless beans considered pseudo scopes and cannot have circular dependencies?
Using wildfly 8.1, I have several beans, and I try to inject several EJBs into each other It can be said that I have t…… -
When to use ‘Java util. Objects.*’？
I'm browsing the seven functions of Java. They talked about Java util. Objects course What I can't understand is the f…… -
Java – file upload “multipart / form” exception org apache. commons. fileupload. FileUploadBase $InvalidContentTypeException
I tried to upload a file using Apache commons, but threw the following exception org. apache. commons. fileupload. Fil…… -
Java – classpath problem using xpathfactory
I encountered the following exception on one of the real-time servers (other servers running the same code seem to hav…… -
Java – J2ME networks, threads and deadlocks
The simple MIDlet code (class MOO) is locked (after excerpt) (at least I think it is locked after reading this article…… -
java – . Time format used in ICs file?
I'm creating one in Java ICs file, I need to know the date and time format to use This is the current format of my ICs…… -
Why is BigInteger in java designed to be immutable?
In Java, BigInteger is immutable, but I want to understand why, because it is often used to do many calculations that …… -
java – MyBatis 3.0. 1 insert questions
I decided to move one of my projects from ibatis to mybatis and encountered an insertion problem mapper xml： <?xml…… -
Java – set vs list vs array as return type of EJB method
I was recently told that collection should take precedence over list as the return value of EJB methods The argument i…… -
Java – JUnit Derby spring: the in memory database is discarded after each test
In my unit test, I automatically installed some data sources using URLs jdbc:derby:memory:mydb;create=true Create dB i…… -
Java – explains the behavior of automatically incrementing a composite ID sequence using hibernate mapping
I have a table CREATE TABLE `SomeEntity` ( `id` int(11) NOT NULL AUTO_INCREMENT,`subid` int(11) NOT NULL DEFAULT …… -
Is there OLE automation in Java?
Can OLE automation be used in Java? If not, why is it impossible in Java? I want to automatically export Excel spreads…… -
Array – call the constructor with array parameters from PowerShell
I am a beginner and know c# moderation Recently, I was writing this power shell script and wanted to create a HashSet …… -
What kind of Java syntax is “= = null? False: true;”
I'm looking at the code and wondering what this means: Boolean foo = request.getParameter("foo") == null? false:true; …… -
Java: how to check whether a lock can be acquired?
If I want to ensure exclusive access to objects in Java, I can write this: ... Zoo zoo = findZoo(); synchronized(zoo) …… -
Java – stores the contents of a text file line by line into an array
All, the problem I'm facing now is that I don't know how to store the contents of the text file in the array Is it pos…… -
Java generics and number classes
I want to create a method to compare a number, but can have an input of any subclass of a number I see this in the fol…… -
Haskell – parallel strategy using Monad
I often see the use and interpretation of Haskell's parallel strategy related to pure computing (such as FIB) However,…… -
Are the default values of Java annotations compiled into bytecode?
I tried to implement several static analyses for Java bytecode They try to calculate whether a method has specific pro…… -
Java – learn about spring boot
I try to understand the difference between spring boot and spring boot web Starting from this boot tutorial, POM inclu…… -
Java – how to check how many threads are waiting for the synchronization method to unlock
Is there any way to check how many threads are waiting for the synchronization method to unlock? I want to know when a…… -
Java – push notifications in spring MVC webapp
I am writing a forum web application using spring MVC I'm just a beginner in spring. Now it's only a week I need help.…… -
Java – pass the parameterized class instance to the constructor
I have lost my way through the jungle, please help me:) I have such a thing: public class BaseClass<TYPE> { …… -
Java – project Euler problem #12
I have always been happy to challenge with project Euler. I noticed that my solution 12 is my slowest speed, reaching …… -
How to set a switch statement in a Java loop
I want to perform a switch in the while loop. At the break of each switch statement, the while loop stops and requires…… -
Unit tests – run JUnit tests using SBT
I have a 0.13 7 SBT project has several subprojects One of them is called webapp, which has many JUnit tests in webapp……