Recent Posts
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Java – is ThreadLocal thread safe?
For example, we have a static ThreadLocal field and a setter: private static final ThreadLocal threadLocalField = new …… -
Java – Lombok: how to specify an Arg constructor?
With Lombok, can you specify an Arg constructor? My goal is to create a constructor using the Lombok annotation, as sh…… -
Java – update Excel files using Apache poi
I'm trying to update an existing excel file using Apache poi Every time I run my code, I get an error, as shown below …… -
java – EventQueue. invokeLater vrs SwingUtilities. invokeLater
Can anyone highlight the difference between the two? Both are required?! I have an application that uses both, but won…… -
Java – which is faster, equalsignorecase or comparetoignorecase
In a Java application, suppose I can choose the following comparison method equalsIgnoreCase(String anotherString) com…… -
The Java – @ secured function obtains the access denied permission of the authorized user
I have implemented spring security into my rest API according to many threads At first I was stuck in the @ secured co…… -
Java – spring boot and thymeleaf 3.0 0. Release integration
I have a problem when I try to integrate spring boot 1.3 5. Release and thymeleaf 3.0 0. Release I know that spring bo…… -
Java – is there a simple framework that allows dependency injection in stand-alone programs?
We basically need to be able to adjust the behavior at startup by providing the required classes generated by various …… -
Java – why use IOException instead of exception when capturing?
I can't seem to say this correctly. Search engines can get any meaningful results try{ BufferedReader reader = new…… -
Java – what are the disadvantages of using Lucene?
I am considering using Lucene for very fast search in my project I know Lucene has created its own file, which holds a…… -
How to delete #text from my node parsing in Java DOM XML parsing
So I have the following code that I almost copied from here The problem is that my text nodes don't contain any text, …… -
Java – can a bifunction reference be passed to a method of the desired functional interface?
I've only used java 6, and now I'm catching up to learn new features in Java 8 I read this article here: It says: Bifu…… -
Java – call the activity from viewholder in recyclerview?
I have a recyclerview that loads the contents of my string array and works normally, but I want to open a new activity…… -
Java – how to define an index in a hibernate entity through several columns?
morning. I need to add an index to the hibernate entity As far as I know, the @ index annotation can be used to specif…… -
Java – multithreading and recursion together
I have recursive code that deals with tree structures in a depth first manner The code is basically as follows: functi…… -
Java – should classes with only static methods be abstract?
I have a class that provides a set of static utility type methods On the one hand, I don't want this class to be insta…… -
JavaFX 2.0 game engine / framework – how will JavaFX 2.0 change java games?
I realize that JavaFX 2.0 has only appeared for a short time, but I hope someone knows about the FX 2.0 game engine (e…… -
Java – anonymous inner classes in Inner methods
See the following code: import java.util.ArrayList; import java.util.List; class Main{ public static <T> L…… -
Can I write the end of a 5GB file in Java?
Can I write the end of a 5GB file in Java? The question appeared in my office, and no one was sure what the answer was…… -
Double vs long serialization in Java
I can store a number as long and double in HBase They all occupy 8 bytes in Java The advantage of using double is that…… -
Java – number of active tasks using ThreadPoolExecutor
I am using ThreadPoolExecutor to perform tasks in my java application I have a request. I want to get the number of ac…… -
JavaFX code editor, the content is highlight for Java code
I want to write a text editor in JavaFX, which is similar to the eclipse / NetBeans ide to highlight java code thank y…… -
Java – Stax – takes XML nodes as strings
XML looks like this: <statements> <statement account="123"> ...stuff... </statement> …… -
Java – use simpledateformat to parse strings to date and time
I have string 11 / 08 / 2013 08:48:10 I use simpledateformat ("mm / DD / yyyy HH: mm: SS") When I parse it, I throw an…… -
java – Map. Is containskey () useful?
See English answer > is using java map containsKey() redundant when using map. Get() 6 Map myMap .... if myMap.cont…… -
What’s the difference between DART’s snapshot and Java bytecode?
I've been reading dart snapshots, which are often compared with Smalltalk images But to me, they sound like Java bytec…… -
Java – interface, instantiation interface?
So I just found this code example on the Internet. I discussed it again, but I was confused By looking at it, what I c…… -
How do I launch the default (native) application for a given file from Java?
I am displaying a list of files; Xls, Doc, PDF, ODT, etc. in my java application (eclipse RCP) When the user clicks th…… -
How do I use filechannel to append the contents of one file to the end of another?
The file a.txt looks like: ABC The file d.txt looks like: @ h_ 404_ 5@ DEF I'm trying to take "def" and attach it to "…… -
Java integer memory allocation
Hey, I want to know the following code snippet public static void main(String[] args) { Integer i1 = 1000; Int…… -
Execute shell commands from Java
I am trying to execute shell commands from Java applications on GNU / Linux platform The problem is that the script th…… -
Center text on canvas?
Can anyone give an example of how to centralize text on JavaFX 2 canvas? Graphicscontext has some functions like sette……