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.
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)))
Hello,
I have seen many times on Java Swing GUIs buttons that look like images until the mouse rolls over them. They appear to not have their content area filled. When the mouse rolls over them, the content area fills in but the button looks as though the mouse is not hovering over it. An example of this would be the toolbar of buttons used to activate each demo in SwingSet2.
How is this effect possible?
Thanks!
can any1 tell me how to insert a table without a table header.
i am making sudoku puzzle and i want to insert a table without the table header in java.Is it possible??
plz help.
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
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?
Hello,
I have 2 .properties files in my java project and I want to define one of them as default file to be used when the language of the operating system is different from the 2 languages already defined.
Can you tell me please what should I add to my code to make that possible?
Thank you
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.
Given a list of potential class names:
1. Alaska
.
.
.
50. Wyoming
Is there a tool that will create empty java class files for each with supplied parameters?
I'm thinking of something like the "New...Class" dialog in Eclipse, only on steriods. :-)
Thanks in advance,
Kyle
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.
Hi friends,
I have text file as
0B85 61
0B86 6161
0B86 41
0B87 69
0B88 6969
0B88 49
0B89 75
0B8A 7575
0B8F 6565
I want to write this string into two dimensional array. (i.e) String read[0][0]=0B85 and String read[0][1]=61.
Please suggest any idea to do this using java. Thanks in advance.
When I use the default java locale on my linux machine it comes out with the US locale settings, where do I change this so that it comes out with the correct locale?
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 , I am trying to play a .wav file with java. I need it when a button is pressed to play a short beep sound. I have google it but most of the code wasn't working. Can someone give me a simple code to play a .wav file.
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?
This is what I'm doing now. Is there a better way to access the super class?
public class SearchWidget {
private void addWishlistButton() {
final SearchWidget thisWidget = this;
button.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
// A better way to access the super class?
// something like "this.super" ...?
workWithWidget(thisWidget);
}
}
}
}
I'm programming with Google Web Toolkit, but I think this is really a generic Java question.
Just finished reading ch23 in the excellent 'Beautiful Code' http://oreilly.com/catalog/9780596510046
on Distributed Programming with MapReduce. I understand that MapReduce is a programming system designed for large-scale data processing problems, but I have a hard time getting my head around the basic examples given and how I might apply them in real world situations.
Can someone give a simple example of MapReduce implemented using either java, javascript or actionscript?
Hi, I have an ASCII String, with HTML entities, like:
à
¨
ç
I need this String to be without those entities and convert them into UTF-8 chars.
Is there any easy way, in java to do that?
Where:
Clazz.method("aà","UTF-8")
returns "aà"
or something like that?
I want to encode a UTF-8 string to a ISO 8859- string in Java
I have this:
String title = new String(item.getTitle().getText().getBytes("ISO-8859-1"));
But it isn't working, the output is Sørensen for example
Is there a way to include all the jar files within a directory in the classpath?
I'm trying java -classpath lib/*.jar:. my.package.Program and it is not able to find class files that are certainly in those jars. Do I need to add each jar file to the classpath separately?
I have read this question and I'm still not sure whether it is possible to keep pointers to methods in an array in Java, if anyone knows if this is possible or not it would be a real help. I'm trying to find an elegant solution of keeping a list of Strings and associated functions without writing a mess of hundreds of 'if's.
Cheers
edit-
'functions' changed to 'methods', seems to bug people.