Java
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Generic class parameters in Java
So I pass activities and intentions in my Android application to handle threads (I'm sure there's a better example bec…… -
java – org. testng. Testngexception encountered while trying to access poolinghttpclientconnectionmanager
So I recently faced testngexception when trying to run an existing test suite using the IDE Recently I mean updating I…… -
Java – resource free method when using jax-rs on tomee
Using inventory tomee, I can't get simple Jax - RS resources I keep getting a mistake: Jun 30,2012 5:09:59 PM org.apac…… -
Java – unable to find spring namespacehandler for XML schema namespace[ http://www.springframework.org/schema/data/jpa ]
Any idea, what might cause this error? This is my 'servlet context XML '(there are some problems with indentation, but…… -
Can JavaFX filechooser “remember” the last directory it opened?
My view controller has a filechooser instance for opening and saving files Every time I call showopendialog () or show…… -
Jsf-2 – @ predestroy is not called after the session expires
This is in was8 JSF 2 application running on 0 This is the code of a page's "support" bean @Named("mySessionBean") …… -
Java – embedded jetty – spring MVC – view Parser – no XML – HTTP error: 404
I'm trying to build a simple spring MVC server using embedded jetty I've set up the server, enabled spring, and set up…… -
Java – compile Maven project
I have an ongoing Maven project. I make sure there are no errors. When I try to compile and deploy "MVN clean compile …… -
Convenient functions of operators in Java 8?
In Python, if I want to collapse the XOR operation, I can write: reduce(operator.xor,my_things,0) Not more trouble red…… -
Java – how to programmatically check HTML documents
I have a database containing small HTML documents, and I need to programmatically insert several into PDF documents wi…… -
Multithread construction algorithm of immutable tree in Java
I want to build an immutable tree data structure that represents any subset of the filsystem directory structure There…… -
Java – Amazon SNS – > SQS message body
I am sending a message from SNS topic to SQS When I check the body of the SQS message at the client, the entire messag…… -
Java – catch parameter parsing exception in spring 3.0 webmvc
I use spring webmvc to provide rest APIs The way I use is like @Requestmapping ("/ path ({ID}") void getbyid (@ pathva…… -
Why does Java 8 completable future thenpose generate different exceptions according to the completion order?
I have encountered the strange behavior of the Java 8 completable future thenpose method I have two tests that differ …… -
Java – NiO – detect closed connections
I wrote a server that uses Java NiO API to execute non - blocking io I see a situation where occasionally the client a…… -
Javadoc – can I group methods?
I am currently creating documentation for classes with many functions Solution Maybe try refactoring it so that you do…… -
Drag and drop images in Java
What I want is to drag and drop images from one JPanel to another I can do this by using the DND library But I insist …… -
Java – is there any way to provide persistenceunitname for spring’s localcontainerentitymanagerfactorybean instead of using persistence xml？
I have multiple data sources and multiple entitymanagerfactories defined in my spring context If there is only entitym…… -
Java – how to return type the return type is also the upper and lower limits of method parameters
Let's assume we have the following code: class A {} class B extends A {} class C extends B {} public static <T&g…… -
Change java version (MAC)
There are 2 Java versions on my computer: /Library/Java/JavaVirtualMachines/jdk1.7.0_07.jdk/Contents/Home /System/Libr…… -
Drag and drop images in Java
What I want is to drag and drop images from one JPanel to another I can do this by using the DND library But I insist …… -
Does the Java garbage collector stop POSIX threads created from JNI calls?
I have a time critical application that needs to send UDP datagrams according to the set schedule The jitter tolerance…… -
Java – unit test of kotlin lambda callback
Suppose we have the following functions to test fun loadData(dataId: Long,completion: (JsonElement?,Exception?) -> …… -
Java – DDD entity and its identifier
There is an entity in my system, which naturally needs an identifier so that it can be uniquely identified Assuming th…… -
Java – did this happen before the program command rules worked in the constructor?
Can you really view partially constructed objects in the thread created in the constructor because of the lack of sync…… -
Java – why doesn’t this code throw a NullPointerException?
background I want to know why a piece of code does not throw NullPointerException source code Consider the following c…… -
What is the equivalent of setresizeweight() on splitpane in JavaFX?
In swing, we can use setresizeweight () on jsplitpane to determine which part of splitpane gets free space Is there an…… -
Java – dynamic language switching in eclipse RCP applications
I am working on an eclipse RCP application with localization Users should be able to dynamically change the language u…… -
Java – why do hotspots compile logs at the same time as managementfactory getRuntimeMXBean(). Getuptime() is different?
When I start the JVM with parameters -XX:+PrintCompilation The output is as follows: 60 1 java.lang.Str…… -
Java – why does thencallrealmethod () lose its parameters here?
I have the following code: when(mockedOperation.getResult(anyDouble(),anyDouble())).thenCallRealMethod(); when(mockedO…… -
Java – SSO for Facebook integration
Is Facebook integrated single sign on available from other applications? Since Facebook uses OAuth 2.0, it seems that …… -
Java – an easy way to specify a default value using the xmlelement DefaultValue annotation
I have a simple POJO annotation class through JAXB: public class MyPojo implements Serializable { private fin……