Is there a well-known implementation, that has friendly open-source licensing (not GPL), of an ECC (error correcting code) library (e.g. Reed-Solomon) for Java?
I have a string which is fed into the query as IN clause,which looks like this ('ACT','INACT') which is one of the parameters to a function inside a package.when a call is made to the function from java,
it looks like this
call package.function(1,2,3,('ACT','INACT'),4,5).
When the package is called,i get error as wrong type of arguments.
It is taking the values inside brackets as different values delimited by strings
Hi,
I want to develop phone dialer application, the app is to use modem to dial phone numbers and play voice messages .
which java api is to be used,other wise is their opensource IVR paltform to serve that ?
I want to add days to a date to get a new date in Java. How to achieve it using the Calender class.
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.
Is there a good way to remove HTML from a Java string? A simple regex like
replaceAll("\\<.*?>","")
will work, but things like
&
wont be converted correctly and non-HTML between the two angle brackets will be removed (ie the .*? in the regex will disappear).
hi
i have problems in converting an XML document type into a Document object..
this is the piece of code
line 1 : Document doc=null;
line 2 : doc = (Document) parser.parse(sourceFile);
for this line 2 it throws java classcast exception..
without the typecast it shows error as
"Type mismatch: cannot convert from org.w3c.dom.Document to javax.swing.text.Document"
how do i now typecast properly? any suggestions??
I am trying to print a double value in my java code. but it is printing in matissa and exponent format which I dont want to. ie
for example:
instead of printing 1234567 it is printing 1.234567E6
how to avoid that.
I was wondering if it's possible to have a java package setup using a different subversion repository than the rest. Ideally, I would probably go with a different library project, but in the case of BlackBerry, the 3rd party library linking does not work well, so I would like to just separate my UI package into a different repository than the rest so that I can control the UI better for different OS versions, but leave all the other packages the same.
Is this possible?
I have a java.util.Set<City> cities and I need to add cities to this set in 2 ways:
By adding individual city (with the help of cities.add(city) method call)
By adding another set of cities to this set (with the help of cities.addAll(anotherCitiesSet) method call)
But the problem in second approach is that i don't know whether there were any duplicate cities in the anotherCitiesSet.
I want to do some processing whenever a duplicate entry is tried to be entered in thecities set.
Can any one let me where the memory leaks can happen when we are developing Java based application.
I am aware of Database but apart from that, is there any other possible ways .
Please list the scenarios
Hi,
I have a Windows Server that recives mail. These mail contains only 1 single CSV file. I want my server to automatically take the attachment from any incoming mail and send to a java program locally installed. Is there anyone who can give me directions on any programs that fix this or do I need to create some kind of windows service?
Thankful for any help!
Is there any way I can get system info, like processor/ram etc (preferably cross platform, in browser)?
I am looking to implement this in a website, so I need it in either flash or a java applet.
Hi,
I am creating one application in java using swing.In that i have an array of String, I try to use html marquee tag to scroll all the strings one by one from top to bottom.But the marquee tag doesn't support in the panel. How can i acheive it.Can any one suggest me?
Thanks in advance
Hi All,
We have a system which performs a 'coarse search' by invoking an interface on another system which returns a set of Java objects. Once we have received the search results I need to be able to further filter the resulting Java objects based on certain criteria describing the state of the attributes (e.g. from the initial objects return all objects where x.y z && a.b == c).
The criteria used to filter the set of objects each time is partially user configurable, by this I mean that users will be able to select the values and ranges to match on but the attributes they can pick from will be a fixed set.
The data sets are likely to contain <= 10,000 objects for each search. The search will be executed manually by the application user base probably no more than 2000 times a day (approx). It's probably worth mentioning that all the objects in the result set are known domain object classes which have Hibernate and JPA annotations describing their structure and relationship.
Off the top of my head I can think of 3 ways of doing this:
For each search persist the initial result set objects in our database, then use Hibernate to re-query them using the finer grained criteria.
Use an in-memory Database (such as hsqldb?) to query and refine the initial result set.
Write some custom code which iterates the initial result set and pulls out the desired records.
Option 1 seems to involve a lot of toing and froing across a network to a physical Database (Oracle 10g) which might result in a lot of network and disk activity. It would also require the results from each search to be isolated from other result sets to ensure that different searches don't interfere with each other.
Option 2 seems like a good idea in principle as it would allow me to do the finer query in memory and would not require the persistence of result data which would only be discarded after the search was complete. Gut feeling is that this could be pretty performant too but might result in larger memory overheads (which is fine as we can be pretty flexible on the amount of memory our JVM gets).
Option 3 could be very performant but is something I would like to avoid as any code we write would require such careful testing that the time taken to acheive something flexible and robust enough would probably be prohibitive.
I don't have time to prototype all 3 ideas so I am looking for comments people may have on the 3 options above, plus any further ideas I have not considered, to help me decide which idea might be most suitable. I'm currently leaning toward option 2 (in memory database) so would be keen to hear from people with experience of querying POJOs in memory too.
Hopefully I have described the situation in enough detail but don't hesitate to ask if any further information is required to better understand the scenario.
Cheers,
Edd
Hi all,
I have a matrix.I found the 10th power of matrix using Java.After finding the 10th power,I need to round off the double values to 3 decimal places.Please help me to round off the double values in the matrix to 3 decimal places.
I want to develop an application in java to capture video from webcam and store it onto a particular location.Can anyone provide me the working code?
What type(usb,ip etc..) of webcam is the best in order to develop the application.
Please help me. how to proceed?
Java loads the resources as they are needed. This make my tiny small desktop application to be very slow when opening a window.
How can I do to load all the resources when starting the app? Is something related to classloaders?
XML spec defines a subset of Unicode characters which are allowed in XML documents:
http://www.w3.org/TR/REC-xml/#charsets.
How do I filter out these characters from a String in Java?
simple test case:
Assert.equals("", filterIllegalXML(""+Character.valueOf((char) 2)))
Are there any example log4j configuration files (XML).
I have a java main application.
I want log4j to output to console AND write to file.
Any examples of this would be greatly appreciated.
I'm using netbeans if that matters.
I make my own GUI see here but system is taking too much resources on further looking into the issue i have found that java pumpevents method is talking too much time.
Any resolutions ????
pump events more detail pump event detail
java.util.zip sucks for stream compression. The longer you leave an Inflator/Deflator open without calling end(), the more native memory it uses up. This is a known issue: http://bugs.sun.com/view_bug.do?bug_id=4797189 which nobody seems to care about fixing.
What is a good alternative? Preferably one that is free and is still actively supported by its developers.
hi,
when I write a new text file in Java, I get these characters at the beginning of the file:
¨Ìt
This is the code:
public static void writeMAP(String filename, Object object) throws IOException {
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(filename));
oos.writeObject(object);
oos.close();
}
thanks
I am new to Java Swing and I am creating a window which displays a list of items retrieved from an XML file that can be manipulated by the user.
The window should have a Cancel and a Save functionality implemented with buttons. While the Save functionality is straightforward (just close the window) I don't know how to implement the Cancel functionality. Does exist an "undo" function? Does anyone know how?