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…… -
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, …… -
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…… -
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…… -
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 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 …… -
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 – we can create runnable objects as its interfaces
I see a sample code that uses the new runnable (), which is an anonymous inner class Runnable runnable = new Runnable(…… -
Java – JSP progress bar
Is there a simple way to implement the progress bar in JSP Basically, I have a JSP page to go to the servlet that call…… -
Java – * * busted * * how to use sun misc. Unsafe speed up byte [] lookup?
I'm trying to use unsafe to iterate memory instead of traversing the values in byte [] Use unsafe to allocate memory b…… -
javax. net. SSL, HTTPS client and close_ notify
Using javax net. Simple netty implementation of SSL HTTPS server with self signed certificate The server is started, a…… -
Java – how do I know if locale is in 12 or 24 hour format?
See English answers > How do I find out why a locale uses 12 or 24 hour time in Java? 3 I found this: if (android.t…… -
Compiler construction – converts an abstract syntax tree into bytecode
I'm trying to learn how to build a simple compiler as a hobby My goal is java virtual machine I wrote a simple syntax …… -
Can I check out the directory structure only in cvsclient in Java?
I'm using org NetBeans lib cvsclient Jar executes various CVS commands in Java classes that communicate with CVs I can…… -
Java – unable to load ‘classpath resource [org / springframework / WS / client / core / webservicetemplate. Properties]
I wrote some code where I was using another web service and sending a request to the web service using the web service…… -
Java – Amazon EMR: run custom jar with input and output from S3
I'm trying to run an EMR cluster with custom jar steps The program takes input from S3 and outputs it to S3 (or at lea…… -
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…… -
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 – 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 – 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 – 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…… -
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 – 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…… -
Migrating from Jack to native Java 8
I'm trying to use lambda expressions and streams in my android project I use the streamsupport library as a stream and…… -
Java – get the current system time and add 30 minutes after that
I want to get the current time in my application I am starting and stopping time from my network service For example: …… -
Java – Design Pattern: avoid switching to decide which service to call
For the project, we have a controller / service / Dao architecture We have implemented calls to different provider API…… -
Java – date change listener
My task is to trigger a method to refresh or reset my application every 12 o'clock I tried to search the Internet for …… -
Log4j in Java – logils: how to log in to a file?
I'm in Grails config This log4j configuration is available in groovy log4j = { error 'org.codehaus.groovy.grails.…… -
Why does go’s compiler “GC” use a different calling convention from C?
C uses cdecl, and I've looked at it and called it with an assembly It feels good. Why break compatibility? Why is anot…… -
How to use opencv featuredetector on small images
I use opencv 3 in Java, and I try to find small images (such as 25) on other images × 25 pixels) However, the feature …… -
Package info. Cannot be modified using java 8 Java comments
I'm facing a problem. I have to modify the package information package-info. java @javax.xml.bind.annotation.XmlSchema…… -
Java – why dir Mkdir() in file No exception handling is required in the case of createnewfile()?
This is a snippet of code File dir = new File("dir"); dir.mkdir(); File file = new File(dir,"file.txt……