Java
-
Java – how to sort Horizontally Partitioned Data
I have a telco billing software system There are daily user telephone records Logs are divided by date (month) level E…… -
Java – RGB to CMYK and return algorithm
I try to implement a solution to calculate the conversion between RGB and CMYK, and vice versa This is me so far publi…… -
Java – need space between currency symbol and amount
I am printing currency in INR format as follows: NumberFormat fmt = NumberFormat.getCurrencyInstance(); fmt.setCurrenc…… -
Java – fatal error: content not allowed in 1:1: Prolog
I'm using Java and I'm trying to get XML documents from some HTTP links The code I use is: URL url = new URL(link); H…… -
Deadlock in Java: when occurs
I'm developing an application for J2ME. Sometimes it's completely frozen. AMS takes a long time to close it In my opin…… -
Java – why do we need to synchronize on the same object to make notify () work
I got Java lang.IllegalMonitorStateException. I mentioned this problem and it solved my problem The first answer is To…… -
Is there a Java geometry library? (not JTS)
I want to be equivalent to CGAL (c) – I want convex partitions of polygons or at least triangulation It must also be f…… -
Java – use huge memory in notifications
I am developing a service application that displays the progress of the timer in the notification area (with progress …… -
How to set the default file name of swing Jfilechooser?
I want to set the default file name to untitled. In this Jfilechooser text box txt. Can I set it? Solution Use the fol…… -
Converting Java applications to Mac OS X applications
Is there a way to convert Java applications to Mac OS X executable applications? I use NetBeans to develop java, and I…… -
Java – the error message “attempt to split long or double on the stack” indicates?
The following error occurred in my code: I am ignorant of the origin of this error and do not know how to debug it Wha…… -
Java – is this object mutable?
If I have such a class: @ h_ 301_ 2@public class MyObject { private int myField = 2; public void setMyField(int f) { t…… -
Java – best practices for controlling access to “. Internal” packages
I write eclipse plug-ins and export some classes as APIs, while I want to restrict access to other classes I follow ec…… -
Java – using maven, OSGi, and bndtools
Today, I was asked that using Maven in our current OSGi application is a good idea We use bndtools and it's great beca…… -
Java – softreference collects garbage too early
I am implementing a caching mechanism for my Android application@ H_ 404_ 2 @ I use softreference, just like many exam…… -
Java – what is the best practice when implementing equals () with entities that generate IDS?
If I have a table a, B, C, D Now, if I'm going to create a business object based on this table (for example, in Java),…… -
java – Cron Job in play framework 2.0
How to schedule tasks in play framework 2.0 through cron expressions? Equivalent to @ on ("< enter cron expression …… -
Reflection – Java 8 – invalid constant type
I have a problem with the reflections library Dependency and in POM Build in XML <dependency> <groupI…… -
Java syntax sugar
I came across this code block today. I don't know how it works I know how to do anonymous classes, but I'm used to see…… -
Java Double vs double：class type vs primitive type
I'm curious about the performance difference between Java classes and primitive types So I created a small benchmark a…… -
Although the serializable interface in Java has no methods and no fields, it can realize its functions What about?
Although Java io. Serializable interface public interface serializable {} surprisingly does not contain any methods an…… -
Java – how do I check if a thread terminates?
When does the thread reach the termination state? When the end of the run () method is reached, will it be terminated?…… -
Java – how to solve ‘define and throw special exceptions instead of using general exceptions.’
When the length of the two lists is not equal, I need to throw runtimeException We use the sonarqube tool for code rev…… -
What is the difference between const and volatile pointers?
What is the difference between const and volatile pointers? Solution The difference really comes down to the differenc…… -
Java – unit testing using Apache Mina as an emulated / in memory SFTP server
I'm working on how to use Apache Mina Their documents are a little inadequate for my powerless brain I've seen useful …… -
Populate check boxes in JSP pages with data from JavaBeans
I have a JSP page with check boxes in the HTML form, as shown below Now, when editing user skills, I want to get comma…… -
Java – how to create docker image files and value parameters for local applications
I have a Java application (jar file) that I want to be able to run from the dock image I created a docker file to crea…… -
Java – have I implemented equals and hashcode correctly using Google guava?
I am using hibernate and need to rewrite equals and hashcode () I chose to use Google guava's equals and hashcode assi…… -
Java – the best way to compare enumerations
See the English answer > comparing Java enum members: = = or equals()? 16 Color c1 = Brown,c2 = Red What is the bes…… -
How do I check the number of threads currently running in Java?
I'm looking for a way to see how many threads are currently running >First > programmatically via windows Soluti…… -
Java – sets the ideal size of the thread pool
See English answers > performance issues with newfixedthreadpool vs newsinglethreadexecutior1 newSingleThreadExecut……