Recent Posts
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Java – * and *? In spring @ scheduled (cron = “…”)
I've been looking at the spring boot example to schedule tasks（ https://spring.io/guides/gs/scheduling-tasks/ ）And r…… -
Java – how to use JAXB to validate XML schema?
I am using XML and JAXB because I ungroup and group XML into Java objects and vice versa Now I try to validate our XML…… -
Java – final static method test
I've been studying for my software development course and got this problem from the example: "Why do you have both sta…… -
Java – use the console to read system. Java for IntelliJ in
I need to open the console and use IntelliJ to enter my homework Is there any way to do this? My code is as follows: p…… -
Java – why does type promotion take precedence over varargs of overloaded methods
public class Test public class Test { public static void printValue(int i,int j,int k) { System.out.pr…… -
Java – why choose JMS for asynchronous resolution? Why is it better than a simple entity bean?
In most of the projects I participated in, the choice of asynchronous solution has always been the source of a lot of …… -
How to use generics in Java to reference nested types?
How do I create generic classes that reference nested generic types? I'm trying to create a comparator class that can …… -
. Net – complex query of ORM (especially NHibernate) performance
Our company is rewriting the existing application from scratch This application and other tasks perform complex SQL qu…… -
Java – PostgreSQL error: undeclared due to user request
What causes this error in PostgreSQL? org.postgresql.util.PsqlException: ERROR: canceling statement due to user reques…… -
Java – how does method parsing and invocation work inside Python?
How do method calls work in Python? Indeed, python method parsing in Python may be slower than Java What is late bindi…… -
Java – is the constructor not a member of a class?
Constructor is not a member of class? If so, why not inherit? JLS 7.0 says that constructors are not members, so they …… -
Java – how do I get a custom space between JList projects?
I've added several images to my JList, and now I'm showing their level. Now I want to increase the space between the i…… -
Java – does pdfbox support spot color and color separation?
I am interested in using it in the project PDF@R_635_2419 @, the project needs to be able to specify spot color and co…… -
Java – why use J_ Username and spring_ SECURITY_ LAST_ Username variable?
Why do things turn out like this? <input type="text" name="j_username" value="${SPRING_Security_LAST_USERNAME}">…… -
Select statement in Java
public void search() throws Exception{ public void search() throws Exception{ Class.forName("sun.jdbc.odbc…… -
Javafx-2 – JavaFX, how to freeze the position of some columns in a tableview
The idea is: on a tableview with n columns, the first m column can always be visible even with a horizontal scroll bar…… -
How to monitor available memory (including cache and cache) in Java?
I have searched for possible solutions, such as how to monitor the computer's CPU, memory, and disk usage in Java But …… -
Array – the goal of combining LinkedList with string reverse is to understand LinkedList
I tried to use a link list program to display the reverse string entered by the user Here is my program to reverse the…… -
Java – smack client – the user is still online even though the connection is aborted
I use smack to build a small XMPP client / BOT to experience a very strange behavior I set up a connection and a conne…… -
Java robot keyboard command key
VK of command key on MAC_ [key] what is the code? I tried to get a Java robot to press the command key I'm using the c…… -
Java: programmatically determine the names of all packages loaded on the classpath
Any suggestions on how to handle how to find the list of package names that exist in the current classpath? This needs…… -
Java – how to get the line number of a method?
Can I get the line number of using reflection or other magic methods? Solution I want to do the same thing. After some…… -
Java executorservice pauses / resumes a specific thread
Is there any way to use executorservice to pause / resume a specific thread? private static ExecutorService threadpool…… -
Java – generics and CompareTo () methods
I'm trying to create a skiplist. I have a method using common data types: public void add(E key,Integer value) { N…… -
Undiluted date, with additional numbers in Java
What's wrong with this code? I try to parse the date format between months and months import java.text.SimpleDateForma…… -
Java – eclipse war export: optimized for a specific server runtime
In eclipse, this option is available when exporting a web project to a war / ear file What happens under the hood when…… -
Java – the best way to create child objects from parent objects [copy]
See the English answer > java: creating a subclass object from a parent object 10 public class Child extends Person…… -
Java – multiple DEX file definitions / buildconfig, unable to find reason:
I am using the new graduate building system and I am facing the following problems: UNEXPECTED TOP-LEVEL EXCEPTION: co…… -
Java – add API baselines in eclipse
Compiling the eclipse source library I tried to add API baseline, but I don't know how to add it or add it What are AP…… -
Java method call performance
I have this code to do range minimum query When t = 100000, I and j always change in each input line, and its executio…… -
Java – publish AAR files to Maven central, gradle does not work
Publishing a file to Maven central and gradle still doesn't work: OK, let's restate all the steps I follow and try to …… -
Java – can I double or BigDecimal overflow?
Java 8 gave us math Addexact() is an integer, but not a decimal Can double and BigDecimal overflow? According to doubl……