How would I go about determining whether a file or directory has been created in Java?
I basically want to create a data directory if one is not already present.
Thanks.
I want to create a simple chat application that supports voice and video (something like Skype or Google Talk). I don't want to write everything from scratch, so my question is do you know some good libraries for that?
I stumbled over libjingle (c++) and Smash (Java), both implementing the XMPP extension Jingle. Would you recommend one of those?
I m consuming java based web service with c#.net app.
I m sending soap message in xml format.
But Im receving this error message:
ns1:Client.NoSOAPAction no SOAPAction header
Hi there,
I have an enum type on my Java model which I'd like to map to a table on the database. I'm working with Hibernate Annotations and I don't know how to do that. Since the answers I search were rather old, I wonder which way is the best?
Thanks in advance
In VB6 there are local static variables that keep their values after the exit of procedure. It's like using public vars but on local block. For example:
sub count()
static x as integer
x = x + 1
end sub
After 10 calls, x will be 10. I tried to search the same thing in .NET (and even Java) but there was none. Why? Does it break the OOP model in some way, and is there a way to emulate that.
Hi,
We have an issue where a Database table has to be updated on the status for a particular entity. Presently, its all Java code with a lot of if conditions and an update to the status. I was thinking along lines of using a Workflow engine since there can be multiple flows in future. Is it an overkill to use a Workflow Engine here... where do you draw the line ?
How does one convert an empty string to an int using Struts2. When the application encounters this parameter with no value, like from an empty text field, it throws the following exception.
java.lang.NoSuchMethodException:
com.XXXXXXXXXXXX.setID([Ljava.lang.String;)
Where ID is an integer, and the URL is:
Something.action?ID=&other=rawr
Is there a way to do this without using an Integer (class)? Do I have to write a type converter?
I'm running in to an error when I try to run my server application from Eclipse. The error is java.net.BindException: Permission denied. I think this is because I am using port 443 to set up an SSL connection. I can get around this problem if I run my code on the command line using javac and sudo. Is there a way to set up Eclipse so that when I hit the run button, my application is executed with sudo?
I need to find the value of n choose r- the number of ways of selecting r objects out of n.
if i first find the numerator then the denominator. i get an exception.
i am using java.
how to do it for example for 44 choose 42
I'm writing a test engine for a Java application that has some of the code written in C. This application uses JNI to access it's native part.
In the engine I'm writing, I use Fest to control de UI and perform the tests. However, I,m blind when dealing with the part that is written in C. I wonder if I can use JNA or JNI to access the native part of the app. I believe that the fact that the application is already running is huge issue here.
Hello.
I have a task to write a web service with use of Hessian and Spring.
Unfortunately there is not enough information so i can't make it work myself...
Please can anyone write a simple Hello World for me?
My version always shows 404 when accesing with browser... I'm new to java so if smb knows how to help tell me what files of my project to share.
Thanks a lot!
Can someone please write to me source code in Java? I have a task: create a program, that contains two dimensional array (with numbers) and the programm needs to sum zeros in each column and then get out the number of column in which the zeros are least.. thanks!
I have this situation(Java code):
1) a string such as : "A wild adventure" should match.
2) a string with adjacent repeated words: "A wild wild adventure" shouldn't match.
With this regular expression: .* \b(\w+)\b\s*\1\b.* i can match strings containing adjacent repeated words.
How to reverse the situation i.e how to match strings which do not contain adjacent repeat words
Suppose I have a Java method that returns a HashMap object.
Because a LinkedHashMap is a subclass of HashMap, I can return a LinkedHashMap from this method just fine.
On the next "read" action (no adding/removing/modifying of K/V pairs), would iterating over the keys of the resulting method (which returns a HashMap) go in the same order as the originating LinkedHashMap, even though the HashMap lacks the key links?
Posting a video on tumblr.com allows you to just paste the URL of the video on youtube, vimeo, whatever and tumblr automatically does the embedding for you.
I assume that this would be nothing more than a mapping between an URL-regex and the belonging HTML construct for embedding the video. Or it is just parsing the response of the URL and getting the construct from there.
Is there already any utility, preferably in Java, for doing this? If not, how would you do it?
I'm building a web app with custom components. I need a way to route requests to class / methods, is there any standalone java library that can achieve that (in a sexy manner [1]) ?
[1] read : no xml!
I am working on eclipse java using swt jface with rcp.
How can i limit the characters in my text box. Like if i want only 4 characters in my text box then what should i do? and what if i want alphanumeric combination . again in certain limit?
For a while I have been struggling to integrate scala with java methods that might return null. I came up with the following utility which helps a lot:
// produce an Option, nulls become None
object Maybe {
def apply[T](t:T) = if (t==null) None else Some(t)
}
Maybe(javaClass.getResultCouldBeNull()).map( result => doSomeWork(result) )
I have a few questions about this solution:
Is there a better or more standard pattern to use?
Am I duplicating something that already exists?
Does this functionality have hidden gotchas?
Hi all,
In my code I am updating two table, one after the other.
update(table1_details);
update(table2_details);
So if the update fails in table1 , table2 should not be updated or should be rolled back.
How to handle this situation. I know I have to use transaction. Can some one help with code !!!
I am using Java with spring and hibernate .
From what I understand, the object state is just stored (values for fields, etc.), however, the execution context is anyways going to be lost.
What's the point of this? What bad can happen if so?
Note* this was taken from Effective Java By Joshua Bloch
I'm fairly new to programming and from learning I have seen different ways of formatting code, comments, etc; and have been recommended on different techniques.
I mostly program in C#, C++, and Java so I want to know what is the the best way to layout code so that if other people where to go through it, they would be impressed by how simple and easy to understand it is.
I would like to know the same thing for commenting as well.
Hello All,
I want to connect to MS SQl server 2005 using hibernate in java. i am unable to find the jars and the hibernate.cfg.xml file for the same. can someone help me with the same
Thanks in Advance
Regards,
Rima
Kryo is a very new and interesting Java serialization library, and one of the fastest in the thrift-protobuf benchmark. If you've used Kryo, has it already reached enough maturity to try it out in production code?
While debating which platform to use for what applications (specifically we debated c++, java, c# and f#) we tried finding scientific quality research on productivity (cost of ownership really) of similar applications build on various platforms/using the above mentioned languages. Any one know of such research?
Is there any free Java library for extracting text from PDF, that is compatible with Google Application Engine?
I've read about PDFJet, but it can't read PDF, can it?
Is there perhaps other way how to extract text from PDF? I tried http://www.pdfdownload.org/, unfortunately they don't handle non-English characters correctly.