Recent Posts
-
Algorithm for filtering / standardizing bad signals
Use GPS to process tracking applications What algorithm should I run to filter out bad signals? It looks like an appli…… -
Java & rabbitmq – queuing and multithreading – or couchbase as a job queue
I have a job distributor that publishes news on different channels In addition, I want two (and later) consumers to wo…… -
Java – PGP data encryption for yubico OpenPGP smart card
I try to implement PGP encryption in Java applications based on yubikey Neo OpenPGP smart card applet It seems to be a…… -
The mysterious veil of Java EE 6 annotation inheritance
I use EJB inheritance in several schemes, and sometimes use annotations in superclasses, such as this general entityda…… -
Java – PGP data encryption for yubico OpenPGP smart card
I try to implement PGP encryption in Java applications based on yubikey Neo OpenPGP smart card applet It seems to be a…… -
High end 2D Java (SE) graphics library [closed]
I am looking for a high-end graphics library for Java Standard Edition I know some fairly low-level libraries: AWT / s…… -
Automatic boxing should be avoided in Java
I'd like to ask if automatic boxing should be avoided in Java Because some methods need a primitive type "double", but…… -
The best learning algorithm for making decision tree in Java?
I have a data set that contains information such as age, city, child age, and results (confirmed, accepted) To help wi…… -
Java – logback is used, but log4j starts displaying warn no Appenders
I'm using logback for logging, but it's working all the time; One day I began to warn Log4j: warn did not find the app…… -
Java – if you do not specify my class, what is the default package for my class?
Let's say I have a name called main Java file, the code is as follows: public class Main { public static void main…… -
Implement autocomplete in Java – did I do it right?
See English answers > create a autocompleting textbox in java with a dropdown list5 >Start > enter city name …… -
Java – trove library threadsafe?
Is GNU trove library thread safe I'm interested in tobjectdoublehashmap I read their documentation but didn't mention …… -
Java – selenium 3.0 firefx driver failed with org openqa. selenium. Sessionnotcreatedexception failed to create a new remote session
Selenium 3.0 firefx driver via org openqa. selenium. Sessionnotcreatedexception failed: unable to create a new remote …… -
Java – generate CSR using bouncycastle API
I was new to Java security and stumbled upon this library called bouncy castle But the examples they provide and the e…… -
Java regular expressions run slowly
I tried to use the darling fireball regular expression for matching URLs in Java, and I found a URL that led to the ev…… -
Java – set Boolean value to false redundancy?
I have read several previous questions and answers [or very similar] on this topic, but none of them really solve this…… -
Java collections and garbage collectors
A small question about performance in Java Web applications Let's suppose I have a list < rubrique > listrubriqu…… -
How to use the monkeyrunner API to make Java applications?
The Android SDK has an API for sending commands to a mobile phone named monkeyrunner It seems to be a python API Is it…… -
Java – find out if path2d is self intersecting
I need to find out if path2d intersects Now, I simply extract a row array from the path and find out if there are inte…… -
java. io. What is the possible cause of IOException: “incorrect file name, directory name or volume label syntax”
I tried to copy a file using the following code: File targetFile = new File(targetPath + File.separator + filename); .…… -
Java – how to get logger value in string array
I use log4j Logger, and I have used fileappender to write log values to files Now I want to display the log values in …… -
Open source java code style try / finally block
See English answers > java IO ugly try finally block12 InputStream in = null; try { in = acquireStream(); .…… -
Java – it is necessary to have getters and setters in POJO
See English answers > are getters and setters poor design? 17 conventional advice seen Solution I don't think so. I…… -
Java 8 date is equivalent to joda’s datetimeformatterbuilder, which has multiple parser formats?
I currently have a joda date parser that uses datetimeformatterbuilder and can receive six different date formats I'm …… -
Java – JTree rendering and jcheckbox node
I'm trying to modify the standard swing JTree to mix nodes with and without checkboxes Here is an example: When I try …… -
Java – why doesn’t Tomcat need to restart when JSP changes
I've been using JSP, servlet I know that as long as we change anything in the servlet, we need to restart Tomcat serve…… -
WebView – JavaFX 8 webengine: how to from Java to console Log() from Java to system out？
I use JavaFX and JavaScript engine to develop applications in JavaFX web engine I want to get feedback from JavaScript…… -
Java – obfuscate initialization of instance variables
I was taking the scjp test and did some simulation tests. I met this one: It asks what is the output of: class TestCla…… -
Java – optionalint vs optional
When scrolling Java I was surprised to find that the optional < T > and optionalint have nothing to do with each…… -
Java – why not simply disable unchecked warnings?
Developers often encounter "unchecked" warnings when interacting with non - Generic APIs Consider the following exampl…… -
Why can javac infer generic type parameters of functions used as parameters?
In the following example, why can the compiler infer that in foo Foo. 0 is called for the first time in test() A gener…… -
Java – dagger 2 component dependency
Is it possible to inject something into the module? I have 2 basic modules / components: @Component(modules = {OkHttpM……