Recent Posts
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Java – sort using spring AOP \ u0026 \ u0026 MVC
I am trying to use spring AOP and spring MVC controller @Aspect @Component public class LoggingAspect implements Order…… -
Java – disruptor – eventhandlers not called
I was playing with the disruptor framework and found that my event handler was not called This is my setup code: priva…… -
Java – jarentry. Java when the jar file is opened from URL to InputStream Getsize() returns – 1
I tried to read the file from jarinputstream, and the size of the file returned - 1 I am accessing the jar file from t…… -
External connection and ORM mapping in Sqlalchemy
I use ORM mapping 0.6 in Sqlalchemy eight I have three tables (a, B and C) and there are no foreign keys between them …… -
java. math. BigInteger pow (exponential) problem
I did some tests on the pow (index) method Unfortunately, my math skills are not enough to solve the following problem…… -
Do java – HQL queries always hit the database and get results?
I'm going through hibernate and when to use criteria vs HQL. My understanding is to use hibernate. Whenever we query t…… -
Why do you have to deal with () an out of range Java awt. Window？
One of the memory leaks I found in my application was Java awt. Window. All windows specific static field that tracks …… -
Asynchronous – rxjava adds items after creating observable
I just started using RX Java and I got stuck Maybe I don't use rxjava in the right way, but I need to add it to observ…… -
When compiling java with different versions of JDK, the same target and source versions are guaranteed to perform the same operation?
We will update our CI system from Java 7 creation to Java 8 After that, we want to migrate the projects to Java 8.0 on…… -
Java multithreading in notebook computers with quad core processors
I'm reading a java tutorial that says that actual multithreading does not occur on a machine with a single processor I…… -
Java – why can’t ‘a’ compile in C, but ` (a) `?
Why is + + I considered an l-value, but I + + is not? 11 int main() { int a = 0; ++a++; // does not compile …… -
Java – hikaripool-1 – driverclassname requires JDBC URL
I'll go back and program my old program https://github.com/JonkiPro/REST-Web-Services. I have updated spring boot from…… -
Java – monitor windows directory size
I'm looking for something that can monitor the size of the windows directory and the number of files I'm talking about…… -
Java – iso8601 using Jackson in JSON in milliseconds
import com.fasterxml.jackson.databind.util.ISO8601DateFormat; import com.fasterxml.jackson.databind.util.ISO8601DateFo…… -
Java parseInt integrity check
I'm trying to parse an int from a string array element. Here's my code: String length = messageContents[k].replace("Co…… -
java – Arrays. Sort (object []) did not throw ClassCastException
Code: public class CompareTest { public static void main(String[] args) { ArrayList list = new ArrayLis…… -
Java assert double is Nan
I try to assert that my double is Nan private Double calculateIt(String input){...} assertEquals(Double.NaN,calculate…… -
Java – the URL can be accessed using a browser, but it is still a FileNotFoundException with urlconnection
I use httpurlconnection to connect to a website and receive a response code = 404 (http_not_found) However, there is n…… -
Java EE – securitycontext is not applicable to @ rolesallowed
I am currently using Jersey 2.5 in Tomcat 7 1 create a backend server For security, I use @ rolesallowed, @ permitall …… -
Java – explicit and implicit locks
Using locks (Java. Util. Concurrent. Locks. Lock) instead of the keyword synchronized, is the method wait() exactly th…… -
Java – get an instance of class [runtime type token]
I created a preferences class. For getters, I don't want to use runtime type token So this is my getter method: public…… -
Java – check user name and password in Android
I have a username and password field, now I need to check it and redirect it to the next page of Android public void o…… -
Java – the same string comparison gives me false
See English answers > How do I compare strings in Java? 23 String temp = ""+(num1*num2); Boolean equal = temp == an…… -
Java – why doesn’t this code cause concurrentmodificationexception?
I'm reading about concurrentmodificationexception and how to avoid it Found an article The code for the first list in …… -
How to clear HTTP from Java?
I am trying to perform purge using httpurlconnection as follows: private void callVarnish(URL url) { HttpURLConnec…… -
Java – default parameter in jar manifest
Is there any way to create a jar file that contains some parameters passed to the main class? (no need to add paramete…… -
Java – JAXB: how to customize XML serialization of two fields
I have a legacy class with many public double fields Use double MAX_ Value initializes all double fields to indicate t…… -
Java – Office add in development – malformed get URL (_host_info =…)
I am currently developing MS Word office addin using the JavaScript interface provided by Microsoft I used Django back…… -
Java – how to use JPA2 to persist entities containing user type fields
I'm looking for a way to persist entities that contain user type fields import org.joda.time.DateTime; @Entity public…… -
Java – I can automatically execute JUnit test cases once when all logging is enabled and automatically execute after all logging is disabled
I have found a solution. Please refer to the answer below Does anyone have something more elegant? I think this is to …… -
Java – run each spring scheduler in its own thread
I have multiple components with @ scheduled annotation, and I find that spring starts only one at a time, even if they…… -
PowerShell – hashtable and custom object array about iteration
I often write lists of things and enumerate them to perform some get / set I hate enumerating hash tables because when……