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• How to Broadcast to a shutdown system using java?

  - by pirates-iiita

  We use socket.send(packet) function in java to send a "packet" to a given port. My problem is that i have to send a packet to a shutdown system using UDP protocol. The problem with send() function is that first it verifies whether the host IP is multicast or not. Now my local area network is of broadcast type. So i am having problem is using this function. can anyone please give me a way ?

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• Tutorial how to create a CXF web service from existing Java code and embed it in Tomcat

  - by EugeneP

  Do you know a tutorial how to create a CXF web service from existing Java code and embed it in Tomcat, and also generate a wsdl file so that any .NET system would be able to generate client code easily? I miss that WSDL creation point in, for example this http://www.ibm.com/developerworks/library/ws-pojo-springcxf/ tutorial. No wsdl file is generated. But still it should be present in my case to provide system interoperability.

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• Java: how to clone ArrayList but also clone its items?

  - by palig

  Hello, How can I clone Array List but also clone its items in Java 1.5? For example I have: ArrayList<Dog> dogs = getDogs(); ArrayList<Dog> clonedList = ....something to do with dogs.... And I would expect that objects in clonedList are not the same as in dogs list. Thanks for any answer!

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• Do I need a semaphore for my thread in Android/Java?

  - by Henrik

  Hello all, When running a thread in Android/Java: public void run() { while (running) { if (moreTasksToExec()) { task = getNextTask() task.exec(); } } } Is it OK to let it run and not using a semaphore to block while no work needs to be executed? I am only using one thread, so I need no inter-thread synchronization.

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• How can I get client side information using either Javascript or Java Servlets?

  - by reply2viveksshah

  How can I get client side information using either Javascript or Java Servlets? Client side information such as client's computer name, its IP Address etc. Thanks in advance.

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• How to open html file in default browser from Java Swing application?

  - by kovike

  My Java Swing application generates html file and I want to open it with default browser when it is generated and saved. How to achieve that?

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• What is the best way to create a debugging web page for a computation in Java?

  - by Shooshpanchick

  I'm developing a website that uses some complex computations (NLP-related). My customer wants to have "debugging" webpages for some of these computations where he can run them with arbitrary input and see all the intermediate results that occur during computation. Before this request all of the computations were encapsulated in beans and intermediate results were logged into general log. What is the best way to capture all these results on Java level to render them as webpage?

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• Could extra imports in Java slow down code loading time?

  - by Spines

  Is it possible that adding more import statements to your java code could slow down the time it takes to load your classes into the JVM?

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• Is it possible to instantiate a Java Annotation given a Class<? extends Annotation>?

  - by Steve

  I have a Class<? extends Annotation> and tried calling newInstance() but Java yelled at me for the obvious reason that I can't instantiate an interface. But I know frameworks like EasyMock are perfectly capable of instantiating interfaces. What would it take to get a completely dumb Annotation instance out of my Class?

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• How do you merge two input streams in Java?

  - by J. Pablo Fernández

  Having two InputStreams in Java, is there a way to merge them so you end with one InputStream that gives you the output of both streams? How?

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• Is there a way to make eclipse report a general "catch (Exception e)" as an error/warning (in java)?

  - by Rog

  I'm trying to encourage a best practice of not catching general exceptions in Java code. eg: try { ... } catch (Exception e) { // bad! ... } Is there a way to flag this as an error/warning in Eclipse? I know PMD picks this up, but I'd rather avoid integrating it into everyone's build environment at the moment.

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• how to add a xml document to another xml document in java.

  - by Jagadesh

  I have a xml document like this rootXMLDoc=<root></root> . I need to insert paramxmlDoc= <parameter par='1'>abc</parameter>. how to insert paramxmlDoc to rootXMLDoc in java.?

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• Is Java worth learning in my late forties? [closed]

  - by bobi

  Hi guys. First I want to say is that I am 37 years old and not from programmer background (actually from biology). And my question is should I start learning Java? I have coded in PHP and JavaScript for a year and a half. Every answer would be appreciated. Thanks in advance Bobi.

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• What is an instance in Java ? Confused between instance and object

  - by happysoul

  Are they same ? Came across this line when reading about Java's main method's signature "String args[ ] declares a parameter named args, which is an array of instances of the class String. Objects of type String store character strings."

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• How to convert a scala.List to a java.util.List?

  - by Alex Baranosky

  I'm trying to use some Scala code and am having a hard time figuring out how to convert the Scala lists into standard Java lists. Any ideas?

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• Are there any way to apply regexp in java ignoring letter case?

  - by Roman

  Simple example: we have string "Some sample string Of Text". And I want to filter out all stop words (i.e. "some" and "of") but I don't want to change letter case of other words which should be retained. If letter case was unimportant I would do this: str.toLowerCase().replaceAll ("a|the|of|some|any", ""); Is there an "ignore case" solution with regular expressions in java?

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• How I can Optimize this mySQL transaction within java code?

  - by worldpython

  Dear All, I am new to MySql database. I've large table(ID,...). I select ID frequently with java code and.And that make a heavy load on transaction select from tableName where ID=someID notes: 1.Database could be 100,000 records 2.I can't cache result 3.ID is a primary key 4.I try to optimize time needed to return result from query. Any ideas for optimization ? thanks in advance

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• How do I get the set of all letters in Java/Clojure?

  - by Jason Baker

  In Python, I can do this: >>> import string >>> string.letters 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ' Is there any way to do something similar in Clojure (apart from copying and pasting the above characters somewhere)? I looked through both the Clojure standard library and the java standard library and couldn't find it.

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• How to enforce a 5-minute per post rule in a session object in Java?

  - by John

  I'm trying to figure out how to enforce a 5 minute per post/action rule. I'm developing a web application with Wicket in Java and I've got a session class which I was planning on using to keep track of these timers on a per-user basis. I wasn't planning on storing the timestamp in a database. public boolean isAllowedToPost() { if(null OR has 5 minutes passed since last post) { // set the new timestamp return true; } else { return false; } }

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• How to design an exception logging table using HyperTable and access it via the Java client?

  - by ikevinjp

  If I have the following table schema to log an exception (in standard SQL schema): Table: ExceptionLog Columns: ID (Long), ExceptionClass (String), ExceptionMessage (String), Host (String), Port (Integer), HttpHeader (String), HttpPostBody (String), HttpMethod (String) How would I design the same thing in HyperTable (specifically, what is the best approach for efficiency)? And, how would I code it using the HyperTable Java client?

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• Where can I find sample java questions for hands-on ? Not certifications type questions

  - by 29b5k

  Hi all, Most google results for sample questions/problems for java, results in a link directing to mock certification questions. Does anyone know where can i find sample problems for practice ? Thanks

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• Is there a solution to parse wikipedia xml dump file in Java?

  - by Syed

  I am trying to parse this huge 25GB Plus wikipedia XML file. Any solution that will help would be appreciated. Preferably a solution in Java.

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• How to learn .wav duration in Java media frame work?

  - by yaseemin

  Hi all, I am tyring to merge an .mov file with a .wav file using java media framework, thus I need to know their duration. How can I do this? Any ideas would be appreciated..

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• Java: Multi-dimensional array vs. One-dimensional.

  - by Mikolan

  For example: a) int [x][y][z] vs b) int[x*y*z] Initially thought i'd go with a) for simplicity I know that Java doesn't store arrays linearly in memory like C does. But what implications does this have for my program?

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• Is there a "best" or more popular database for standalone Java app?

  - by Tom Brito

  Is there a "best" or more popular database for standalone Java app? I'm currently writing by hand, but I would like to know what is commonly done, if there is something that is commonly done.

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