Why can't Final variables be accessed in a static variables. At the compile time they are simply substituted directly substituted with their values so, they should be allowed to use even in static methods why is this restriction??? ...
Java 6 API primitive type wrappers have pairs of static methods decode(String s) and valueOf(String s). Both of them return a new object of wrapper class type and none of them are annotated as deprecated. Does someone know the difference between them? For example: Byte b1 = Byte.decode("10"); and Byte b2 = Byte.valueOf("10"); ...
I have just started programming with Java and noticed I might need to improve my math skills if i'm to do anything worthwhile with it. I just noticed that some of the exercises should be easy for someone with a solid understanding in math as there seems to be some math formulae running the show. I finished high school two years ago and d...
So I'm trying to explore Clojure's internals and I've come across something I'm not quite sure I understand: From the REPL, I can access RT.var("clojure.core","require") just fine (this is supposed to return the var associated with the "require" symbol in the "clojure.core" namespace): user=> (clojure.lang.RT/var "clojure.core" "requir...
I am talking to a device via a telnet connection (telnet client from apache), the device requires us to send a CTRL-B to go into a certain mode. How can I send that via java? ...
I'm converting a JAX-RPC client and service to JAX-WS, and am trying to figure out how to set the client timeout programmatically. This will be a JAX-WS 2.1 client running in WebSphere 7. In JAX-RPC, there was a property I could set on the SOAPBindingStub to set the timeout. In the JAX-WS code, I've tried setting several properties as...
I write couples of servlet program, however I dont think I fully understand how servlet run. So here is couples question that I have: All the code I wrote about Servlet only run on Netbeans with apache tomcat run behind. When I run my html file that make request to the servlet, it usually give error saying that it could not find the s...
I am using a MSDOS to pipe in a file.. I am trying to write a program that counts how many times each word pair appears in a text file. A word pair consists of two consecutive words (i.e. a word and the word that directly follows it). In the first sentence of this paragraph, the words “counts” and “how” are a word pair. What i want the ...
I have several libraries that I want to import into my project. They are all Jar files I've created, and they were built using Eclipse, then preverified using the command-line tool. Now, I'm working in the BlackBerry JDE (not Eclipse) and I've added the Jar files into my main project. Originally, it wouldn't compile, complaining about...
Currently I have a library that is logging certain information as ERROR. If I change my log4j settings like this: log4j.logger.com.company.theirpackage.foo=OFF that will completely disable the library's logging altogether. However, what I'd really like is to still see the information, but have it logged at a WARN or INFO level. In oth...
Supposing that I have a standard EAR file (and the source files that were used to generated it,) what additional processing needs to be done to convert it to an IBM WebSphere "Enhanced EAR"? Another way to ask this question would be to ask, "What is the difference between an Enhanced EAR and a standard EAR?" I'm very aware that there i...
Below is a small test I've coded to educate myself on references API. I thought this would never throw OOME but it is throwing it. I am unable to figure out why. appreciate any help on this. public static void main(String[] args) { Map<WeakReference<Long>, WeakReference<Double>> weak = new HashMap<WeakReference<Long>, WeakReference<...
Hello, I have a list of XML tags and a method for each of them inside my class, getting that tag as an argument and doing its work. So all the methods get the same input and I want to loop through the list of tags, calling appropriate method each time. In Python I've made it with a hash of strings (names of tags) to lambdas (self.metho...
Apologies in advance for asking a (seemingly obvious) question. I haven't found an answer online, so I figured I'd ask: Is Java's Util.Random platform-independent? For Example, is new Random(50) going to produce the exact same sequence of random numbers in both *nix and Windows systems? ...
Hello lads and ladies, I'm a bit freaked about what I just read. I did some research, as I want to start programming in Java, and I came to the conclusion that NetBeans is the best IDE for me because of its capable Swing GUI Designer and powerful reporting with Jasper Reports (iReport). Yet Oracle (who will soon buy Sun) doesn't seem ...
I'm using Spring MVC 3.0 and can't quite see all the parts to this problem: my controller will produce a list of domain objects. Let's say a simple User object with firstName, lastName, age, and role properties. I want to output that list of users in a table (one column per property), each row also having a checkbox which are all selecte...
I'm trying to put some new functionality into an existing app that uses iBatis but I'm a little stuck with one of the design decisions. There is an existing class (call it class A) which I want to add some new fields to. These fields will be of type B. The query will join B via an outer join. So it will be something like public c...
Hi, I would like to know what's the best way to get the last entry of a table with JPA. In Sql, what I'm looking for would be like: select id from table order by id desc limit 1 I was thinking about model.count() but that sounds more like a hack than a good solution ;) ...
I am just following along the spring tutorial (http://static.springsource.org/docs/Spring-MVC-step-by-step/part1.html) I downloaded this version of Eclipse: http://www.eclipse.org/downloads/packages/eclipse-ide-java-ee-developers/galileosr1 I guess tomcat is a separate install? Update Is Ant ready to go with eclipse, or that is yet an...
Reading the javadoc for EhCacheManagerFactoryBean and EhCacheFactoryBean I figured that: <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean" p:configLocation="classpath:ehcache.xml"/> <bean id="locationCache" class="org.springframework.cache.ehcache.EhCacheFactoryBean" p:cacheManager-ref="...