Java
-
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…… -
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…… -
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…… -
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. …… -
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 – 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…… -
Use classpathscanningandidatecomponentprovider with multiple jar files?
I am looking to use classpathscanningcandidatecomponentprovider to find subclasses of specific classes in my JVM What …… -
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…… -
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…… -
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 – 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 { …… -
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 – 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 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…… -
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 – 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…… -
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 unchecked / exception clarification
I've been reading about unchecked and checked questions, and no online resource really knows these differences and whe…… -
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 – 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…… -
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 – 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…… -
Use the start process and wait commands in PowerShell
I'm new to power shell. I don't have much programming background. I just try to use it for software packaging Anyway, …… -
Java 64 bit JDK problem
If I compile some java files using the 64 bit JDK and then create a jar file from them, do the generated jars use the …… -
Multithreading – find tutorials and information on load balancing between threads
I know that the term "load balancing" may be very broad, but the topic I'm trying to explain is more specific. I don't…… -
How to perform different operations in update() of observer in Java?
I just started using observable, observer and its update () method. When different actions call notifyobservers (), I …… -
JSF. Load and invoke supported bean methods on each page
See the English answer > invoke JSF managed bean action on page load4 I have pages with datasheets and several bean…… -
java – inputstream. Available() is always 0
I don't know what happened to my code I made no mistakes and did not respond I'm writing data to serialport and activa…… -
Java – how to export all my IntelliJ code styles to Editorconfig file?
I tried to develop a standard code style for my project, and I've found it http://editorconfig.org/ , this is a standa…… -
Java – when to use hibernate connection. provider_ class
When should I use hibernate connection. provider_ class？ Me and 'hibernate connection. diver_ There is a bit of confu…… -
The target version of java compiler “jsr14” and JDK7 / 8
Who can tell me that javac with jsr14 target option can still use JDK7 / 8? Say, $javac -source 1.5 -target jsr14 Hell…… -
How do I inform users that a specific tab in jtabbedpane needs attention?
Suppose you have a user interface with five or more tabs and you need to notify the user that tab "2" needs attention ……