Java
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Multithreading – prevents / removes threads from publishing messages to the main UI thread
My problem is that if a thread quickly publishes messages to the main UI thread, and if I update the UI at that time, …… -
Concurrency – can a single process run in multiple cores?
Can a single process run different threads on different cores? (I think they can) @ h_ 301_ 3@ In this case, different…… -
Java – multiple object types in an ArrayList
I have an abstract class named user, which can be created as student type or teacher type I have created an ArrayList …… -
Java – making a flash screen with an eclipse progress bar
My main class loads the configuration from the file and then displays a framework I want to use a progress bar like ec…… -
Detect OS sleep and wake up events in Java
Is there any way for Java programs to detect when the operating system is about to go to sleep, or fail, or at least d…… -
Rotate the coordinate plane of data and text with Java
I need it: The following code sets this problem It works except for two problems: 1.) Draw the data point, the upper l…… -
How to generate serialVersionUID programmatically in Java?
I am developing a project to generate java files I want to be able to add serialVersionUID just like using the serialv…… -
Java – LDAP user password authentication using JNDI
public static void main(String[] args) public static void main(String[] args) { String INITCTX = "com.sun.jndi.lda…… -
Java – how to handle thousands of quartz queries gracefully?
We have a required application >Reprocess large amounts of data at night, and > reprocess large amounts of data …… -
Java – Oracle jdbc driver statement cache and bonecp statement cache?
I am using the Oracle jdbc driver and evaluating bonecp I asked myself if I should use one or another for statement ca…… -
Java – what is imageobserver?
When you draw an image, you need an image observer New comments new new new flag new new new flag new new flag new fla…… -
Threshold image using OpenCV (Java)
I'm working on a project with OpenCV I need to convert the following image to a threshold image I tried this function:…… -
Java – Find Unused public members in eclipse
I have a class with 1600 public static members I have to find and delete unused Is there any way to do it in eclipse S…… -
How to create a universal date formatter in Java for Solr?
I have a request that you can pass the date in the following format before indexing the date to Solr The following is …… -
Cause: Java sql. Sqlexception: connection and managed connection org. jboss. resource. ADA independent
I have an application for JBoss, seam, hibernate and H2 I wrote a simple operation to import data from an external fil…… -
Java – JMX monitoring using ZABBIX
I need to check the memory size and CPU utilization of my application, find ZABBIX as a monitoring tool, and hope to b…… -
Java – how to avoid concurrentmodificationexception when iterating over this collection?
I need to iterate over a series of projects & sometimes added to the collection at the same time However, if I add…… -
Java – Maven: the jar will be empty – nothing is marked as contained
I have a little problem with Maven When I run the command MVN package, I get the following warning: [warning] jar will…… -
Java – why doesn’t Proguard confuse method bodies?
I'm using Proguard to confuse my Jar program Everything is normal, but Proguard does not confuse local variables in th…… -
Multithreading – how to update GUI from thread using Delphi
I am using Delphi anonymous thread to execute code If I do this from within the thread, changes will occur, but once t…… -
Operator – rxjava returns the subscribed value in the function
For some reason, I sometimes want to use RX operators instead of the normal Java way to convert data structures, becau…… -
Multithreading – how to update GUI from thread using Delphi
I am using Delphi anonymous thread to execute code If I do this from within the thread, changes will occur, but once t…… -
java. util. zip. Zipexception: duplicate entry: Android / support / V7 / graphics / drawable / drawableutils class
I just changed the support library from 23.0 0 updated to 23.1 0, now when I build the project, I receive this error: …… -
Java – how to parse / decompress / decompress Maven repository indexes generated by nexus
I've been from http://mirrors.ibiblio.org/pub/mirrors/maven2/dot-index/nexus-maven-repository-index.gz Downloaded the …… -
Java static members in subclasses accessed through generic parent classes
This seems like a new problem, but the last time I use Java, the language has no generics I have a class hierarchy (ch…… -
Multithreading – why is Google Chrome renderer multiprocessing rather than multithreading?
Every time I load browser tags in chrome on my Mac, the application forks out to another process This seems to work di…… -
Java – how to configure my log4j (using GlassFish) login log directory instead of configuration?
My log4j The properties file has the following line: log4j. appender. logfile. File = MyApplication. log My log file a…… -
Java – parent POM Invalid wrapper for XML, must be ‘POM’, but ‘ear’
Someone can suggest a solution, with the following exceptions I'm going to create a multi - module project The parent …… -
Does java have a static sequential initialization failure?
A recent problem here is to have the following code (and similar) to implement a singleton without synchronization pub…… -
Java – Excel read error: invalid header signature How?
I am uploading an excel file from my browser I'm using poi. Jar But get wrong The two JSP files I use are as follows: …… -
How does Java – JFrame work? Deep inside, how does it draw things?
Usually, when I create a class, such as customer, I give it some data fields, that is, public int IDnumber; And some m…… -
Multithreading – is this a race condition?
Definition of competitive condition: racial condition or racial hazard is a defect in the system or process, in which ……