Recent Posts
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Java – jaxp API that is not valid when unmarshalling JAXB
I have a JAXB object that I can ungroup very well However, if I add an element [] field annotated with @ xmlanyelement…… -
When Java TimerTask is scheduled in the timer, has it been executed?
I want to clarify about TimerTask When you have the following code: timer.schedule(task,60000); The task is scheduled …… -
Package Java nio. File does not exist
I'm studying how to compile Java. Java from the command line This is what I got: This is what I got: /myjava/compile.c…… -
Java 8 function constructor from templated object
I am using eclipse Luna service release 2 (4.4.2), Java 8 U51 I'm trying to create a method that will create an instan…… -
Why user Do dir system properties work in Java?
Almost every article I've read tells me that you can't create chdir in Java Accepting the answer to this question mean…… -
If Java does not have a preprocessor, what is “import”
This article is in 2.2 1 says that there are no more typedef, definitions or preprocessor In C, include is part of the…… -
Java – is generic programming an example of polymorphism?
I'm doing a homework (a project) and one of the criteria is that I must take advantage of polymorphism in a way that s…… -
Java linked list that supports rapid deletion of any node?
java. util. LinkedList does not allow you to quickly delete a given object in the list The remove (object) method perf…… -
Java – how to place log files in the user’s home directory in a portable manner in logback?
I want to put the log file in the user's home directory How do I do it in a portable way, i.e. working on windows, Lin…… -
Java – what is the difference between JPA project and EJB project in eclipse?
Which one is used? When I want JSF stateless bean JPA entity application, do I need to integrate EJB project and dynam…… -
Java – call the ColdFusion function on another server?
I have a Java class that must be run, and my current web host (share) will not allow Java I need to host it on another…… -
Java – why is “t instanceof T” not allowed, where t is a type parameter and t is a variable?
Eclipse indicates that the instanceof operation is not allowed for the type parameter due to the generic eraser I agre…… -
Java – how to use reflection to call methods with parameters?
This is my lesson: public class A{ private void doIt(int[] X,int[] Y){ //change the values in X and Y }…… -
What is the shortest way to delegate an unimplemented method to an object contained in Java? [waiting for answer]
I include the primary object (with most functions) in helpers, which will provide a convenient method I have only one …… -
How to focus items in a Java combo box
Is there a way to center the items in the combo box in Java? I tried this, but it didn't work: myCombo@R_793_2419@.set…… -
Rest – jaxrs API vs. jsr311 API vs. javax ws. rs-api vs. jersey-core
For each of the above, I'm a little confused and still confused This is my understanding of this: >Jaxrs API: conta…… -
Java – advantages of using a dynamic client with jax-ws
What are the advantages of using dynamic clients with jax-ws services over using only generated client classes? What a…… -
Java – how do I deploy my war on Tomcat for so long?
I have a web application that usually takes a lot of time to deploy on Tomcat I suspect that a database connection is …… -
Java: unchecked convert from X to Y / how to implement castornull
I have implemented this function: static <X,Y> Y castOrNull(X obj) { try { return (Y)obj; } catch(Class…… -
Java – enum and class loader
Sometimes you may not even know that the environment in which you insert code has multiple class loaders In this case,…… -
Use Java – getcontentresolver () and GetWindow () in dialogfragment
I'm trying to insert seekbar in the dialog box to change the brightness To this end, I wrote this code public class Lu…… -
Java – classes that implement interfaces without type parameters cannot be compiled
I have the following test codes: public interface Container<I> { public void addClass(Class<?> clazz);…… -
How to implement unit converter in Java
How can I implement a unit converter in Java??? I'm thinking about an abstract base class: public abstract class Unit …… -
Basic problems of Java
public static void main( String arg[] ) public static void main( String arg[] ) In the above statement, can I use int …… -
Use java to delete all files with extensions
I'm (relatively) new to Java and I'm trying to implement a to run a command list Jar, at the command prompt of Windows…… -
Java – what is the best way to “Ping” a database through JDBC?
I tried to determine the best way to Ping the database through JDBC "Best" I mean fast and low cost For example, I hav…… -
Java – when to use runtime Maxmemory() and totalmemory() [copy]
See English answers > What are runtime getRuntime(). totalMemory() and freeMemory()? 6 What are the typical use cas…… -
Java – can I convert relax ng to XSD?
See topic: if so, my second question is, how? I tried to use the Trang Java library and nothing happened:（ Solution T…… -
Java – what is an interface based framework?
I'm reading effective Java and reading static factory methods to create objects Chapter 2, item 1 Do you have an advan…… -
Java – programmatically check the available heapsize?
I'm using eclipse The problem is that if less than 512MB of memory is allocated, my application crashes Is there any w…… -
Java – httpservletrequest#getheader (“user agent”) returns null browser name
I'm using java 6 I know very little about JSP and servlet I'm using the following code to get the name of the browser …… -
Java – sets the timeout for user input
Can I set a timer for user input? Wait 10 seconds – proceed to the next step, etc //wait several seconds{ String s = ……