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• java RSA Multiple Encryption

  - by user1763730

  I encrypt my message with a symmetric key and the symmetric key itself has to be further encrypted with different RSA public keys. When I tried to implement the above I got the following error: javax.crypto.IllegalBlockSizeException: The input was invalid: Invalid input length. at com.rsa.shareCrypto.j.hD.engineDoFinal(Unknown Source) at javax.crypto.Cipher.doFinal(Cipher.java:2087) at wrap1.main(wrap1.java:69) Is there a way to solve this problem ?

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• (Java) weird value of System.getProperty("os.version")

  - by Helpme

  hello fellow java developers, Im trying toget the System.getProperty("os.name") of my own machine. I am running a java application directly from the machine from within eclipse. My machine is "windows 7" the returned value is "windows vista" ! Seems wrong, very wrong. and yes I am sure that I am running the app on a windows 7 machine... Any ideas as to what is going on here?

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• Best way to send floating point numbers from .NET to Java and back

  - by Evgeny

  I'm writing a .NET application that will make an RPC call to a Java application (via a message queue). The data sent in both directions will be large arrays of floating-point numbers. What is the best way to serialize them to send them across the wire? I'd like something more compact than text, but architecture-independent as the server may not be an x86 machine. The Java application can be changed as needed.

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• meaning of import statement in java file

  - by Rozer

  Can any one clear me exactly what happend when we do import statement in java files. does it inscrease the size of file if we add more and more java classes. why we dont use classloader for the same and what are the restrictin for importing.

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• Calling Maven goals from Java

  - by ned24

  Is it possible to call Maven goals from Java, for instance, can I do the equivalent of: mvn clean package from a Java class? thanks, Nick

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• continuously fetch data from database using JAVA

  - by deathcaller

  Hi all, I've a scenario where my java program has to continuously communicate with the database table, example my java program has to get the data of my table when new rows are added to it at runtime. There should be continuous communication between my program and database. if the table has 10 rows initially and 2 rows are added by the user, it must detect this and return the rows. My program shouldn't use AJAX and timers. Please Help.

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• Does Jquery add value to JAVA / J2ee Programmer

  - by harigm

  I am java J2ee Programmer, I came across Jquery some where in Stack over flow, If I am Planning to learn Jquery My question is 1) Does Jquery Add any additional weightage in my Java / J2ee Career 2) If Yes, What way it can help me

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• Returning char array from java to C - JNI

  - by Malik

  I have a object store in Java. My C program stores data (in form of char array) in java. Now I wish to retrieve data from my store. I cannot find any function call that returns me an char array. How can I do this?

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• python-like Java IO library?

  - by drozzy

  Java is not my main programming language so I might be asking the obvious. But is there a simple file-handling library in Java, like in python? For example I just want to say: File f = Open('file.txt', 'w') for(String line:f){ //do something with the line from file } Thanks!

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• JDK Installed but browser (FF, IE) can't run Java apps

  - by Zai

  I have installed latest JDK (x64) on Windows 7 but browsers still can't run the java apps. I understand that JDK includes JRE. JDK is installed correctly and from command line (Java -version) shows installed version as well. Any suggestion please? Thank you

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• "Low level" project using Java

  - by Tammy Wilson

  I'm wondering if it would make sense to do some low level or OS stuff(a project) using Java. Reason why I ask is because I would like to expand my knowledge in Java and I'm into doing stuff like file compressor, bulk file renamer, etc. Are there any examples out there that I can look at or play with? Or should I just be using C or C++ instead? Thanks!

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• Taking MySql backup from my Java application

  - by dhiraj

  I am developing a Java application with MySql as the database. I have to dump the MySql database from my application periodically(let say every day at 10 a.m.) and I have written a batch (.bat) file for dumping the database. The batch file is working fine, but the problem is that it is asking for password each time during its execution. Is there any way to dump MySql database without prompting for password and achieve it from Java application periodically?

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• Call C methods from C++/Java/C# code?

  - by Mohit Deshpande

  Many of today's programming languages are based on C; like C++, C#, Java, Objective-C. So could I call a C method from C++ code? Or call C from Java or C#? Or is this goal out of reach and unreasonable? Please include a quick code sample for my and everyone else's understanding.

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• related to java file handling.

  - by sadia

  In Java how can I take the data of my file on my display screen? I want to use data in my file and also want that data to be displayed on my output screen when I execute my program. Can any body please help by providing me such example in Java language. Thank you!

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• Unable to load main-class for jar file.

  - by Logan

  I have developed an application using Eclipse IDE. After creating the application I exported the project in jar format. When I am trying to run this jar file, I get the error: Unable to load main class. Please Help.

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• Creating New Object of Other Class dynamicly ?

  - by Meko

  I am trying to create new object of other class in a for loop. like for(int i =0;i<10;i++){ Computer p1=new Computer(10,20); } and when I try anywhere to reach p1.someAction(); it say you must declare p1. But if I declare it on top of program how can I create again in loop? I also try only Computer p1; but it gave exeption ..

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• Java library to render static SWF to raster image

  - by asd

  Do you know a Java library to render static SWF file (no animation, just raster and vector images on a canvas) to PNG? I know swfrender (a part of swftools) but I need java, not C.

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• Overload with different return type in java?

  - by nunos

  So, I am just starting Java and, even though I have looked in some question about it here at stackoverflow.com and elsewhere, haven't been able to find a straightforward answer to why isn't possible to overload a function just by changing the return type. Why is it so? Will that provably change in a future version of Java? By the way, just for reference, is this possible in C++? Thanks.

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• Creating a C++ static lib to use with Java on Android

  - by Josh

  I have some C++ code that I want to make into a static lib for use with Java on the Android platform. Can anyone point me to a resource that tells me how to do this? I am completely new to Java and Android.

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• From Java/C++ to XML

  - by Greenhouse Gases

  I know Java and C++ but am looking to get in to XML. I don't want to waste time reading over the basics of programming in a book, so has anyone any recommendations for resources for learning XML that assume a knowledge of programming already, or even better highlight how to switch from Java/C++ to XML ie. main differences etcs.

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• Interface Vs Abstract Class

  - by Hari kanna

  In OOPS When to use Interface? When to use Abstract class? Real time example plz... Difference not needed...

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• how to convert mp4 to mp3 in java

  - by insighter

  Hi, Looking for a minimal way to convert mp4 file to mp3 file in java, ideally I also need an cutting of target file. Do java libs support this or only 3th party ones? jmf, ffmpeg? Thanks!

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• How to parse .ics file in java?

  - by MadhuBala

  Hi all.I need to parse outlook calendar file(.ics).how to parse it using java ?Is there any api is available to parse the calendar file ? I am new to java . can any one help me ?

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• example of using scala.collection.immutable.Set from java

  - by Jason S

  Does anyone out there who's familiar with Scala know how I could use scala.collection.immutable.Set from Java? I can vaguely read the scaladoc, but am not sure how to call scala methods like "-" from java (I assume that I just need to include some scala .jar file in my classpath...?)

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• Hidden features in java [closed]

  - by Ravisha

  Possible Duplicate: Hidden Features of Java Just want to know any hidden/very rarely used features of java which are not so dominant in coding. Like i found the ?? operator in c#

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