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• java interfaces

  - by Codenotguru

  write an interface with one method,two classes that implement the interface, and a main method with an array holding an instance from both classes.Using this array variable call the method in a foreach loop.This is a interview question in java anybody?

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• difference between hashmap and array list in java?

  - by Venkats

  In java, ArrayList and HashMap are using in collections. But i couldn't understand at which situations we should use ArrayList and which time use HashMap. What is the major difference between both of them?

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• Java marshaller performance

  - by cbz

  Hi, I've used JAXB Marshaller as well as my own marshaller for marshalling pure java bean objects into XML. It has been observed that both of them require almost same time to marshal. The performance is not acceptable and needs to be improved. What are possible ways where we can improve performance of marshaller? Like threading?

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• Smartfoxserver java extension

  - by Daniel

  Hello, I'v created a java extension that handles login requests using smartfoxserver for my game. The following is inside the internal event: View Here: http://mfpurl.net/index.php/view/8e43b130 But its complaining invalid login request?

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• java database backup restore

  - by jawath

  how do i backup /restore any kind of databases inside my java application to flate files.Are there any tools framework available to backup database to flat file like CSV, XML,or secure encrypted file,or restore from csv or xml files to databases ,it should be also capable of dumping table vise restore and backup also

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• How to create .exe file for java project.

  - by Manu

  hi all How to create .exe(executable)file for java project?. thanks for your help in advance.

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• Tutorials on packaging a java application

  - by JCH

  Hi, Can somebody point me to some tutorials and best practices that show to make a build from source code for a java desktop / jee web application ? I want to learn what needs to be packaged as a war/jar from source and how it must be structured? br /jon

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• Java OCR package

  - by pstanton

  what is the best OCR package you've used with java? I need to parse mainly numbers in a single font and am looking for a well architected, lite weight library to use. thanks.

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• Translate Ruby snippet to Java

  - by sipwiz

  How can I do the equivalent of the Ruby snippet below using Java? require 'net/http' res = Net::HTTP.get_response(URI.parse("http://somewhere.com/isalive")).body

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• Same keyword for two purposes in java?

  - by gurukulki

  As we use "default" keyword as a access specifier, and it can be used in switch statements as well with complete different purpose, So i was curious that is there any other keywords in java which can be used in more then one purposes

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• Same keyword for two purposes in java?

  - by gurukulki

  As we use "default" keyword as a access specifier, and it can be used in switch statements as well with complete different purpose, So i was curious that is there any other keywords in java which can be used in more then one purposes

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• How to Configure Google app engine Java project when using third party libraries like spring

  - by Praneeth

  How to configure applications that use Spring MVC for GAE Java. Is there an article which gives this information? More specifically I would like to know if I am required to upload spring related jars also to the cloud? How do I need to configure my application if I needn't upload these jars?

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• data mining open source software in java

  - by pat

  Hi i just like to know is there any open source data mining software written in java that is approximately less than 3k lines of codes? If yes, please give download link i need to do software testing thank you.

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• Java Operator Precedence Comparison

  - by Andrew

  Does java have a built-in method to compare precedence of two operators? For example, if I have a char '/' and a char '+' is there a method I can call that compares the two and returns true/false if the first is greater than the second (e.g. true)?

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• How to determine a random int between 1 and 800 in java

  - by Charlie

  I feel like this is trivial, but my brain is not functioning. How can I generate a random integer between 1 and 800 in Java?

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• How to convert dwg file to jpeg or gif format using java api or .net library

  - by magh

  How can be autocad file (dwg) converted to jpeg or gif file using java api or or .net library. Without using the convertors Thanks in advance

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• Any YAML based fixture loader for Java?

  - by Adrian

  I've used DbUnit but after playing about with the Play Framework recently I've found it's Fixtures.load(String yamlFilename) really useful. Anyone know of a similar tool that can be used with any Java project?

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• Why is System.arraycopy native in Java?

  - by James B

  I was surprised to see in the Java source that System.arraycopy is a native method. Of course the reason is because it's faster. But what native tricks is the code able to employ that make it faster? Why not just loop over the original array and copy each pointer to the new array - surely this isn't that slow and cumbersome? Thanks, -James

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• how to add to dates in java??

  - by terrific

  I want to add days in a date to get a new date in java. How to achieve it using the Calender class. Gregorian calender. Calender dom = new GregorianCalender(d, m y); is the instance of my date of manufacture and I want to reach to Date of Expiry adding some 100 days to the current date and store it in doe but unable to do that. Any help would be appreciable.

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• Maximum number of type parameters used in a java class

  - by True Soft

  What is the maximum number of type parameters you used in a java class? Example for 4: class MyClass<A, B, C, D> { }

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• "using" keyword in java

  - by DrDro

  In Java is there an equivalent to the C# "using" statement allowing to define a scope for an object: using (AwesomeClass hooray = new AwesomeClass) { // Great code } This has probably allready been asked but the keywords make it difficult to find a relevant question.

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• parallel java libraries

  - by jetru

  I'm looking for Java libraries/applications which are parallel and feature objects that can be queried in parallel. That is, there is/are objects in which multiple types of operations can be made from different threads and these will be synchronized. It would be helpful if someone could ideas of where I could find such applications as well. EDIT: Actually, language doesn't matter so much, so C++, Python, anything is welcome

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• Mint Linux - Downgrade Java to 1.5

  - by Chrisc

  Hello, Currently, I am running Mint Linux (Release 9). I need to downgrade Java from version 1.6 to 1.5, and have been trying to figure out how to go about this. So far, I've had no luck. The package manager doesn't seem to have it. Does anyone have any suggestions? Thanks, - Chris

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• Web Search API for Java

  - by MadSeb

  Hi, I need a Java library for doing web searches ( any search engine is good ). I should be able to to write code such as: WebSearch search = new WebSearch("Apple"); System.Out.Println("Results = " + search.Results.Count); Does such a library/API exist ? Regards, Sebastian

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• what is java exception?

  - by Stupid_medankia

  What is java exception? Is an exception considered an error? When should I throw exceptions? How many kind of exceptions?

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