Recent Posts
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Java – property of type not found in JSF
I tried to invoke an attribute using primefaces in JSF. But I have the type managedbean Error 500 not found on persone…… -
What is the correct code pattern for completing transactions in Java (exception rollback and successful commit)?
I am looking for a common code pattern to correctly handle transactions that may be abnormal I assume that there is a …… -
Java – Android gets the PID of other applications
I want to be able to start an activity or service and get the PID of the process as soon as possible, which will be th…… -
Java – Hide / filter nodes in JTree?
I have a data object in treemodel, and I want to show only a part of it in JTree - for argument, say leaves and their …… -
Java unchecked / exception clarification
I've been reading about unchecked and checked questions, and no online resource really knows these differences and whe…… -
Java – checks at run time whether a class has a specific constructor that uses generics
Hello:) I'm trying to choose the correct constructor in the class This is the code: Constructor[] constructors = targe…… -
Java – how do I manage optional spaces in ANTLR?
I tried to parse the data file in ANTLR – it has optional spaces 3 6 97 12 15 18 The start and end positions of t…… -
How to find out which thread locks the file in Java?
I'm trying to delete a file previously used by another thread in my program I can't delete the file, but I don't know …… -
Java generics and collections reading reference
Although I know some working knowledge of generics and collections, I can also say that I have some experience in usin…… -
Java – trim struts 2 text string input
What is the best way to trim this string? Where is the best place to place the trim code? Suppose my JSP has the follo…… -
Is JavaFX the choice of a dynamic GUI for a desktop or stand-alone application?
I want to make a dynamic UI for desktop applications I'm going to create it in JavaFX The second thing I want to know …… -
Java – I’m confused about writing a program to place some modified large parts on the 8 x 8 board
For this question: I want to write a powerful algorithm to find the maximum This is what I wrote: public class Main { …… -
How do you use CouchDB change notifications to make continuous changes from Java?
I'm trying to use CouchDB (continuous) change API in Java and find that after exhausting the current change list, the …… -
Java – trim struts 2 text string input
What is the best way to trim this string? Where is the best place to place the trim code? Suppose my JSP has the follo…… -
Java – jar folder for eclipse project
I'm trying to create a centralized folder (some kind of "meta project" in my eclipse workspace) for common jar files t…… -
Use classpathscanningandidatecomponentprovider with multiple jar files?
I am looking to use classpathscanningcandidatecomponentprovider to find subclasses of specific classes in my JVM What …… -
Java – spring 5 – how to provide static resources
I'm trying to provide static resources in my web application. I've tried: @SuppressWarnings("deprecation") @Bean WebMv…… -
Groovy equivalent of Java 8 lambda expression
I have only one method that has this java interface@ H_ 419_ 2@// Java Interface public interface AuditorAware { Audit…… -
Java – which is better when calling a function: twice or storing the result in a variable?
I doubted this problem many times, but I couldn't find the right solution I'll clear it this time I like something 1. …… -
Java – resttemplate does not pass the origin header
I'm trying to use spring's resttemplate for cross - source requests Communication is done between two spring boot weba…… -
Jpa-2.0 – JPA cascading persistence – many to one
I have a one - on - one relationship and I'm trying to stick to a sub - entity public class Office { public int id; pu…… -
Add two vectors by name
I have two named vectors v1 <- 1:4 v2 <- 3:5 names(v1) <- c("a","b","c","d") names(v2) <- c("c","e","d") I…… -
How do you use CouchDB change notifications to make continuous changes from Java?
I'm trying to use CouchDB (continuous) change API in Java and find that after exhausting the current change list, the …… -
Java Gregorian calendar time zone
I have a strange question about Java Gregorian calendar: SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm…… -
The Java – graphics2d conversion result does not match the manual conversion
I use Java's graphics2d to manipulate my drawing on a component using affinetransform Sometimes I need to manually ope…… -
Java – do I need to use @ remote when I want to expose EJBs to different applications on the same application server?
I have a @ stateless @ local bean successfully deployed in my ear When I browse the JNDI tree, I can see the new EJB 3…… -
Java – no body message is displayed when sending attachments
When I send an attachment, I can't see the body message in the email (message. Settext (this. Getemailbody());) MimeMe…… -
Java – Android – listview onitemclick() is not triggered in 4.1 jellybean
I have a user who only installs 4.1 (frozen beans), and listview onitemclick() stops working in my application Events …… -
In Java cross plateform ably, there is no time to seed the random generator
I initialize two random number generators on two threads almost at the same time. I want the behavior of the two gener…… -
Is there any way to use typescript in my code Collections. HashTable？
I saw the implementation of "hashtable" in the code of typescript compiler (in the file Src / compiler / core / hashta…… -
Java – log in and play non blocked?
Log in to play non blocked? Does it use some non blocking IO APIs behind the scenes? Is it scheduled in some other thr…… -
Trace the Java / Android stack to a unique bucket
When a stack trace of unhandled exceptions is recorded in Java or Android (for example, through acra), the stack trace……