Java
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Multithreading – the QApplication thread is frozen due to another qthread
In my QT application, I created a qthread, which should perform some heavy computing tasks regularly The main Q applic…… -
Java – direct field access in spring MVC 3
I want to use direct field access for "command objects" in spring MVC 3 Solution You can use the @ initbinder annotati…… -
Java – is there a way to force eclipse to automatically clean up every run?
I'm developing and using eclipse to create an APK for Android, which also has an APK with C code So file My problem is…… -
Java – deserialization with @ jsonsubtypes without value – missing attribute error
I deserialize jsons like this: { "type":"a","payload" : {...} } The type of payload depends on the type My class: pu…… -
Java: disk based fast hash set
I need to store a large hash set that can contain up to 200 million 40 bit values It is acceptable to store it as a va…… -
The difference between kotlin and Java string is separate from regex
If we have a Val TXT: kotlin String =“1; 2; 3;” And like to split it into digital arrays, we can try the following met…… -
Using selenium 2.0 webdriver in practice
I want to write selenium test cases in JUnit and test my project in multiple browsers. I want to take advantage of the…… -
Java – clean up projects and regenerate class files in eclipse
After I cleaned up a project in eclipse, I didn't see the class file generated in the output folder "bin". Although th…… -
Java – design problem: Reservation System
I have to design and implement a reservation system for the hotel I have >Array list of reservation Objects > ar…… -
Use the new standard javax JSON serializes POJOs into JSON
I like the idea of using JSON serialization standard in Java, javax JSON is a big step forward. You can create an obje…… -
Java – how to include all modules in a POM project
I'm looking for a way from another POM XML contains all the modules in the project So in my case, I have a parent POM …… -
Java – shuffling array in multithreading
I have an array of size n I want to shuffle its elements in 2 threads (or more) Each thread should use its own array p…… -
How to understand the wait and notify methods in java thread?
I am very confused about these two descriptions: >"Wait method blocks the calling thread and relinquishes the monit…… -
Java – read the newline character in CSV, which is referenced in the file in flatfileitemreader of spring batch
I tried to parse CSV files with flatfileitemreader This CSV contains some referenced line breaks, as shown below email…… -
Java – JAXB and inheritance in Collections
How do I map (through JAXB in Java 1.6) collections to XML and XML, and where class mapping{ @XmlElementWrapper(na…… -
Java: preparing statements without connections
I'm trying to generate some SQL files in my java application I want to use Java sql. Preparedstatement creates my stat…… -
Get split value after Java string splitting
I have a dynamically generated string I need to split the string according to the relational operator To do this, I ca…… -
Java – nginx: when nginx is used as the reverse proxy, can the response header be captured in the access log?
We use nginx as a reverse proxy to control and record access to clojure (Java) web service applications We can use ngi…… -
Java: how to store references to all instances of a class?
I'm used to C. to get a list of all instances of a class (this is a library class that can be extended by users), I us…… -
Java – XHTML to PDF how to cache CSS using fly saucer
In my production pipeline, I need to generate hundreds of PDFs from HTML In this case, I first convert HTML to XHTML D…… -
Java implementation of intervaltree deletenode
I need an intervaltree or rangetree implementation in Java and can't find an implementation with work deletion support…… -
Java – does AspectJ not capture all events in the spring framework?
My project is based on spring framework 2.5 4. I try to add aspects to some controllers (I use AspectJ 1.5.3) I'm at a…… -
Java – unable to understand class objects
The Oracle Java documentation on internal locks and synchronization says: I don't fully understand the concept of clas…… -
How do I store and reuse key pairs in Java?
I want to generate the key pair once and reuse it public static KeyPair generateKeyPair() throws Exception { K…… -
Java – how to use a custom runner when using categories in JUnit?
I have a bunch of JUnit tests that extend my basic test class basetest, which in turn extends assert Some of my tests …… -
Java – in IntelliJ, why should I clean up and build wars to see changes when I run Google App Engine locally?
I'm using the Google application engine to build wars, and I notice that whenever I make local changes, I don't apply …… -
Java – spring boot jsr-303 / 349 configuration
In my spring boot 1.5 In the application, I am trying to configure support for JSR - 303 / JSR - 349 authentication I …… -
Java – spring utilities cannot be resolved
I'm trying to use one of the Oracle GUI examples of spring utilities But eclipse gave me errors and could not resolve …… -
Test – guava ticker cache expired
Google guava tutorial says cache expiration can be tested with ticker According to my understanding, I can use it to f…… -
Java – in Hadoop map reduce, will any class see the entire key list after sorting and before partitioning?
I'm using Hadoop to analyze very uneven data distribution Some keys have thousands of values, but most have only one F…… -
Build a process pipeline using processbuilder in Java 7
I've been trying to figure out how to manage some processes in Java using the new process builder I can't find a suita…… -
How can this Recursive lambda be invoked in Java?
I recently encountered this code in Java It involves functions and printing Fibonacci numbers, and how it works public……