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• How to change to a different port for Java server in Netbeans to listen ?

  - by Frank

  I use Netbeans 6.7 to develop Java servlet. It defaults to port 8080. How do I change the port number to 8083 for example?

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• Can anybody give me a complete list of data structure supported in Java(not in util package)?

  - by Kavin

  I want to know what kinds of data structure in Java and not in the util package? For example: Hashmap, Collection, Set. Please give me a list of them as many as possible. Thank you

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• http proxy script that can handle javascript in Java ?

  - by fwfwfw

  CGIproxy works great for LAMP stack, but was wondering, is there a java class for a Http proxy that can pretty much render any HTML/Javascript ?

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• Can we convert any java program into an eclipse plugin ?

  - by Karthik

  I want to write a plug-in which tracks the updates to a text file and stores them in a separate file. Should I first write a simple java program which does this and then try to convert it into a plug-in?

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• How can I host many identical java web applications?

  - by aelkin

  Hello, I have a problem. I need to host many (tens, hundreds) of small identical JAVA web applications that have different loads during one time. I want to use Glassfish V3. Do I need to use a load balancer and clusters or something else? Advise where can I find information about similar problems and their solutions... Best regards, Alexey.

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• Is Object constructor called when creating an array in Java?

  - by Peter Štibraný

  In Java, an array IS AN Object. My question is... is an Object constructor called when new arrays is being created? We would like to use this fact to instrument Object constructor with some extra bytecode which checks length of array being constructed. Would that work?

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• does Java have the @ character to escape string quotes?

  - by mrblah

  My string has double quotes in it, in c# I would do: string blah = @"this is my ""text"; how would I do that in java?

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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 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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• How do I make my java webservice client fetch and parse WSDL upon execution?

  - by ventolin

  I've created java webservices and clients using Netbeans. However, the clients seem to have the WSDL already 'built-in'. Is there an easy way of making my client fetch and parse the WSDL code upon execution, so that if the webservice moves to another server, the client is just invoked with a different commandline argument for where to find the webservice?

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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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• How to convert a Java Long to byte[] for Cassandra?

  - by dfrankow

  Lazy programmer alert. :) Cassandra stores column values as bytes (Java example). Specifying a LongType comparator compares those bytes as a long. I want the value of a long into a Cassandra-friendly byte[]. How? I poked around for awhile. I think you people can help me faster.

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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 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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• Is there anything like Enumerable.Range(x,y) in Java?

  - by Simon

  Hello there. Is there something like C#/.NET's IEnumerable<int> range = Enumerable.Range(0, 100); //.NET in Java?

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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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• Is there any way to use javaw with JNI instead of java?

  - by Xinus

  I am using JNI to initialize classes in my jar files present at the classpath. But created executable uses java and displays ugly command prompt when my program starts. I want to configure my JNI to use javaw instead. How can I achieve it? Platform: Windows 7

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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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• 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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• 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 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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• Best way to get the highest sum from a Matrix (using Java but algorithm is the issue here)

  - by user294896

  Sorry I dont know the correct terminology to use but I have a 3x3 matrix like this 1 3 4 5 4 5 2 2 5 and I want get the highest score by picking a value from each row/column but I cant pick the same row or column more than once , so the answer in this case is 3 + 5 + 5 = 13 (row0,col1 + row1,col0 + row2,col2) 4 + 5 + 5 = 14 is not allowed because would have picked two values from col2 I'm using Java, and typically the matrix would be 15 by 15 in size. Is there a name for what Im trying to do, and whats the algorithm thanks Paul

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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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• 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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