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• Java/Eclipse Dependency mapping / graphing tool - Where is a JAR being used in my project?

  - by gav

  Hi All, I have a JAR on the build path of a medium sized Java application and I would like to know where it's used. At the most basic level if someone could tell me how to 'Find References' for a Jar that would be great. Whilst I'm looking at dependencies it would be great to find a tool that would map all of my package / external library usages and graph them. I used to have a free plug-in for eclipse that did just that but I haven't been able to rediscover it. Thanks, Gav

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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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• how to take user input in Array using java?

  - by sadia

  how to take user input in Array using Java? i.e we are not initializing it by ourself in our program but the user is going to give its value.. please guide!!

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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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• 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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• 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 to create an array, array list, array stack and array queue in Java?

  - by theband

  I was reading a Java article, but found no differences in the declaration and was confused over. Can anyone list me out this?

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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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• How to communicate with a USB device under Windows and Java?

  - by Gili

  I'd like to communicate with a USB device under Windows and Java but I can't find a good library to do so. I don't want the user to have to install any extra hardware or device drivers to make this work. That is, I want to be able to interact with USB just like other Windows applications do. I am familiar with jUSB and JSR 80 but both seem to be dead projects (at least for Windows).

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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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• 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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• 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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• 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 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 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 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 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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• 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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• 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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• 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 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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• 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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• I need a Java code that takes tab delimited info from a file to a displayed table and updates the fi

  - by Rin

  I need a Java code that takes tab delimited info from a file to a displayed table. The user should be able to click a row and update it, this is followed by updating the file. The code should use Swing objects.

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