Java
-
JPA – jpql query select optional general Dao selection
I have retrieved the category object according to a valid JPA example: return (ArrayList<Category>) getEntityMan…… -
Java – send invalid XML characters in soap request
I want to send special (&, '(single quotation mark)) characters in soap request I use axis 1.4 The web service cli…… -
Java – unable to obtain the jdbc driver of MySQL in Tomcat environment
I've been trying to get the driver class connected to MySQL's JDBC bash-3.2$echo $CLASSPATH /home/cmao/public_html/jsp…… -
Static and overlay in Java
public class B { static int i =1; public static int multiply(int a,int b) { return i; } …… -
Java – optional jar wrapper
I have a small program Jar, which uses a huge library A small part of the jar Is there a tool to repackage several can…… -
The frequency response is calculated from the filter coefficients
I can't find any understandable information about the subject On Wikipedia in the Netherlands, I found that you can ap…… -
Java – if we don’t generate windows, why doesn’t timer work?
This is the code: import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame;…… -
What’s the difference between Java – serialized objects because they can persist?
We know that serializable is a tag interface (that is, an interface without any methods) So I want to know how to impl…… -
Java – the difference between Max heap and sort stack
I want to know when we can use collections Why do we need a new data structure like Max heap when sort method sorts th…… -
Java – does the runtime match o (nlogn)?
I wrote a class (greedy strategy). At first, I used the sorting method with O (nlogn) Then I used the binary search tr…… -
Extract the zip file in the BlackBerry Java app
I'm trying to write code to unzip the zip archive and put the output in another folder Do I have to use a third-party …… -
Java – how to get the instance number
Is there any way to get the instance number or ID? I mean, you can see it in the eclipse debug > variables window a…… -
Java, wait for the child process to exit
Using Java's processbuilder, I'm creating a set of subprocesses I can use the waitfor () method in the generated proce…… -
Java – part of my layout moves up with the keyboard
My Android application has such a layout. When I open the keyboard, two imageviews are displayed on the keyboard at th…… -
Java – extract subgraphs from drawings using Jun?
I have a big picture. I'm using Jung I wonder if Jung provides a way to extract the two hop neighborhood of a vertex (…… -
How to convert Java util. The date object is converted to a restricted form of the canonical representation of datetime
I need to put Java util. The date variable is converted to a representation similar to the following 1995-12-31T23:59:…… -
Creating jar files for Java applications
I created a Java application that uses the data in its config folder. It also uses a third-party jar file located in t…… -
How to delete drawing lines in Java?
The question is how to delete old rows? I mean, only the current X and Y lines are displayed on the screen, so that th…… -
Java – why are exception error strings different in different environments?
I have this code to handle catching specific exceptions private static final String CONNECTION_REFUSED_EXCEPTION = "ja…… -
java – Webdriver showModalDialog
We use webdriver for functional testing However, our application uses the showModalDialog JS function to open a pop-up…… -
Java – how to read international characters from the console
How to read international characters from the console in Java? Solution Using Java io. Console class, just like any ot…… -
Java – how to add a throws exception clause when implementing a defined method in an interface without a throws clause?
I need a class to browse the collection, and then I implement the iterator interface The only exception thrown by next…… -
Java – any website / book / technique for practicing recursion and OO design?
I just want to know if any websites have problems practicing recursion and OO design (given some entities that design …… -
Can java process delete loaded jars?
Hello, I have the following questions: During the unloading process, I loaded a jar (JDBC Driver) URL pDriverJar = jar…… -
Java – Android random number
I generate a random card from the array And assign it. " public void rand() { String rank[]= {"tclub1.png","tclub…… -
How to see whether two Java queues are equal according to the content value of each queue?
I want to implement an equals override, which compares two Java queue objects based on them, and the contents of each …… -
Servlets – how do I specify filter priority in a Java Web application?
Hello, I hope I can define two such filters <filter-mapping> <filter-name>SecurityFilter</filter-na…… -
Java – accessing EJBs from POJOs
Can I access EJBs from POJOs? I tried @EJB MyClass obj But it doesn't work Solution If you use JSR - 199 (Java context…… -
Java – Tomcat log request parameters
Is there any way to record request parameters in Tomcat? What if so? thank you. Solution Tomcat has a requestdumperfil…… -
Java – best practice response getOutputStream
Allow users to download any comments about my code if(fileObject !=null) response.setHeader("Content-disposition","att…… -
Java – running Grails in a remote environment
I have a "named" server, which seems to cause Grails to be unable to find localhost Running Grails application.. 2011-…… -
Add listener at runtime? – Java MVC
In my MVC mode, my model generates components at runtime and provides them to the view to be displayed on the screen t……