Java
-
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…… -
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…… -
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 – 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…… -
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 …… -
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 – 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 – how to programmatically scope beans
I tried to find the scope of the bean by its name What I have found so far is: beanfactory#isPrototype(String name) …… -
How to support multiple truststores in Java SSL client applications
In our Java application, we need to use HTTPS protocol to communicate with the server list on SSL The list of servers …… -
Java：Math. 32-bit FP implementation of sqrt()
Standard math Sqrt () method seems to be quite fast in Java, but it has an inherent disadvantage that it always involv…… -
In Java, why is the new operator not used to allocate memory before the data type?
If we need the new operator to allocate memory for objects, why don't we use it class-name class-var = new class-name…… -
Java：Math. 32-bit FP implementation of sqrt()
Standard math Sqrt () method seems to be quite fast in Java, but it has an inherent disadvantage that it always involv…… -
Java – context hierarchy in spring boot based testing
My spring boot application starts as follows: new SpringApplicationBuilder() .sources(ParentCtxConfig.class) .chil…… -
How to use java to know the original size (width and height) of SWF file?
Is there any way to know the original width and height of SWF file in Java? int width,height; // my stream contains a…… -
JavaFX video cannot be played
I followed some tutorials on playing video by combining JavaFX with swing (JFrame), but all I got was a black screen, …… -
Copy two 2D arrays to another 2D array
I have another Java question:) I've read the this thread and it clearly explains it, but I have two 2D arrays I want t…… -
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…… -
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 – 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…… -
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 – 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…… -
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 – 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…… -
Multithreading – multithreading a * search with Java or LISP or c# search
Is there a good way to multithread a * search? Single threading is quite easy, as given in (for example) Artificial In…… -
Java – how do I use eclipse to check the status of debug symbols?
When discussing another question, I asked @ Aaron digulla and pointed out the following: File Src Zip is for me, but I…… -
Java – what happens if the certificate that signed the jar (with a timestamp) expires
I signed a jar with time stamp 2 years ago The certificate is about to expire What will happen? Will users be warned a…… -
Java – negating unary operators in Hibernate QL
I'm trying to HQL switch Boolean fields using: update Entity e set e.booleanField = not e.booleanField where e.id = ?1…… -
Java – how to read Class file?
See the English answer > How can I open Java class files in a human-readable way? 17 Solution To read this, you nee…… -
java. time. ZonedDateTime. Parse and iso8601?
Why does the jdk8 datetime library seem unable to resolve valid iso8601 datetime strings? Its time zone offset is expr…… -
AspectJ: pointcut for lambda expressions
I have a Java 6 project that is migrating to Java 8 We use AspectJ to record some user actions, such as button clicks …… -
Java – enables gson to deserialize numbers to integers or doubles
I'm sorry for gson I have a simple JSON. I want to deserialize it into map < string, Object > I'm really intuiti…… -
Java – use socket to send ArrayList from server to client through TCP?
I'm trying to send an object from a server socket to a client socket over TCP I can't find the problem This is the err……