I have to convert one of my code segment from C to java. Code is given below. union commandString{ char commndStr[20]; struct{ char commnd[4]; char separator1; char …
package javax.servlet.annotation does not exist
I have some of the following imports defined like the following as shown in the image below. I am wondering, how can I eliminate “package javax.servlet.annotation does not exist” error. I am currently working on “Java Web” type of project in Netbeans 7.4. . Secondly, I believe , the ab…
Spring dynamically choosing between data sources (alternative to ThreadLocal)
I’ve read about AbstractRoutingDataSource and the standard ways to bind a datasource dynamically in this article: It uses a ThreadLocal context holder to “set” the DataSource: I have a quite complex system where threads are not necessarily in my control, say: Scheduled EJB reads a job list f…
Package org.jboss.netty.channel.socket.nio does not exist
Which JAR contains org.jboss.netty.channel.socket.nio? I’m not using Maven or Ivy, just Ant. Ant compile gives: In the classpath is: The library is netty-4.0.21.Final.tar.bz2, which was downloaded from the official Netty website. I added each JAR from that download to the project. Yes, I realize it̵…
SOAPHandler handleFault
Can any one explain me when SOAPHandler’s handleFault(SOAPMessageContext context) method is called ? My Handler class is : Can any one explain when handleMessage and handleFault method is called ? Answer According to : http://docs.oracle.com/cd/E13222_01/wls/docs103/webserv_adv/handlers.html#wp222524 ha…
Spring Bean Validation @Valid handling
I have created a Spring MVC REST service using Bean Validation 1.2 with the following method: If object isn’t valid, Tomcat informs me that The request sent by the client was syntactically incorrect. and my validatedMethod is never called. How can I get the message that was defined in the ValidObject be…
JPA PessimisticLockScope.NORMAL and locking “relationships”
I am studying JPA Documentation and encountered the following lines: Entity relationships for which the locked entity contains the foreign key will also be locked, but not the state of the referenced entities (unless those entities are explicitly locked). Element collections and relationships for which the en…
Incompatible types List of List and ArrayList of ArrayList
The below line gives me error : What is the reason? EDIT I understand if I change my second ArrayList to List, it does not give me error. I want to know the reason of error though. Thanks Answer If you had a List<List<Integer>> then you’d be able to add a LinkedList<Integer> to it. But…
How to see if a texture is touched in libgdx?
pretty much i want my texture to move to a random position on the screen when its touched and when its missed i want to system.out(“missed”). I cant figure out how to see if its touched. right now i can only get if the screen is touch and it records about 10 touches for every one touch because it …
Can’t fix Unsupported major.minor version 52.0 even after fixing compatibility
When I try running my java .jar on another machine I get the error Unsupported major.minor version 52.0 I compiled my program using the jdk 1.6 and my machine (separate one) has java 7 installed. …