Java
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Java – best practices for using JFrame constructors?
In my two Java classes and the books we use in them, the GUI using code involves a lot of JFrame constructors The stan…… -
Java: no AWT graphics created?
Are there any libraries that can create drawings without using AWT? thank you! Solution Unless you want to implement y…… -
Java Logging – Wrapper？
I started with a new project and made some considerations about logging I always use patterns, where each class that c…… -
Unit of measure API in Java?
Jsr-275 has been rejected. The measurement of measurement API project for Java project is a set of interfaces, but the…… -
Java – use the builder in mapstruct (using the immutables annotation processor) to map objects to immutable objects
We use immutables framework to generate all DTOs Now we want to map these objects to another using mapstruct However, …… -
Timer error Java lang.IllegalStateException
I tried to display a tag in JRE 8, saying that everything is only 3 seconds, because I can't use datepicker in JRE 7, …… -
Running Java programs on the back end
Hello everyone, I want to run a Java application as a back-end process It's like Tomcat server For I have developed an…… -
Java – how to link bifunctions?
I want to link bifunctions, just like in the chainwanted method in the following code example Bifunction takes functio…… -
Java – the relationship between GEF and GMF?
I am studying the eclipse modeling project and the summary of its subprojects It will not be published. Its only purpo…… -
Java – using dependency injection in Libraries
I am writing a Java library that will be used by existing applications I'm using dependency injection, so testing is e…… -
Multithreading – how to avoid threading?
I've recently read a lot about how writing multithreaded applications is a great pain, and I've learned enough about t…… -
Java – the sum of all numbers for a given positive number
Method returns that if you enter a number, assuming 345, the output should be 3 4 5 = 12 – > 1 2 = 3 What did I do …… -
Java – must be called ReleaseStringUTFChars after GetStringUTFChars (when char * is passed to C function)?
I'm a little confused about the objects passed from Java to C? Should they be deleted in native JNI methods or garbage…… -
Working with nested collections using java 8 streams
Recently, I encountered a problem when using nested collections (maps values in list): List<Map<String,Object>…… -
Java – @ Autowired bean used with @ valid on the controller but failed in the crud repository
I am using the user registration form to process the spring MVC hibernate JPA application. I decided to use the jsr-30…… -
Drools – gets the Java. DLL when the activate method is called on the taskclient lang.NullPointerException
Exception getting null pointer when calling activate method on client object This is my code @RequestMapping(value="/l…… -
Java – clean architecture: combined with interactors
I recently stumbled upon Uncle Bob's clean architecture. I'd like to know whether the interactors can execute other in…… -
Java Unisex bathroom
I have to use Java semaphores to solve this problem, but I don't know how. I can't find any relevant Java data What's …… -
Java, assertion and JIT
I tried to infer the JIT reason of hotspot I am most interested in the latest compilation phase (C2 compiler) Does JIT…… -
Java – how to get a list of classes in a project that are no longer needed for anything in the project
Is there any way to generate a list of classes in a java project that are no longer needed by any other classes in the…… -
Concurrency – printing to stdout results in blocked goroutine runs?
As a stupid basic threading exercise, I've been trying to implement sleeping barber problem in golang It should be eas…… -
Java – what is the memory range to refresh or publish to various threads when using volatile and synchronized?
This problem only concerns memory visibility and does not occur before and after There are four ways in Java to ensure…… -
Java – how Cassandra pages behave during concurrent inserts
I use the Java client and pagingstate to page the large result set of cassanda 2.2, as follows: https://datastax.githu…… -
GlassFish – interceptor problem in Java ee7
I am testing / switching to Java ee7 (GlassFish 4). One problem I encounter is the interceptor. Whenever I try to run …… -
Java – what should I use to display game graphics?
I have a game system, but I don't know how to display it I'm making a vertical shooter game. I've written methods for …… -
How to maintain the same session ID across multiple web applications in Java
How do I maintain the same session ID for multiple web applications in the JBoss server? Solution For similar question…… -
Java – how to start multiple debugging sessions in eclipse by clicking?
I am currently writing GWT applications through eclipse Eclipse is used for development, but I use the m2eclipse plug-…… -
How to ensure that Java programs use UTF-8 encoding
I recently found that relying on the JVM's default encoding can lead to errors I should explicitly use specific encodi…… -
Java – ideas for an alternative to ORM RDBMS?
I am currently developing proof of concept for alternative data storage The reason why I need to enhance a webapp that…… -
Java – IntelliJ displays the “always true” prompt, but not “always false”
Therefore, I use IntelliJ idea to program in Java. I'm trying to use the keyword instanceof. My code looks like this i…… -
Use event listeners as Java 8 stream sources
Fast cleaning Can a traditional event listener be refactored into a Java 8 stream so that the listener event becomes a…… -
Java – Model View Presenter and composite view
I try to follow the MVP (especially passive view) pattern in Java Swing UI applications The basic design of the applic……