I'm trying to figure out how to enforce a 5 minute per post/action rule.
I'm developing a web application with Wicket in Java and I've got a session class which I was planning on using to keep track of these timers on a per-user basis. I wasn't planning on storing the timestamp in a database.
public boolean isAllowedToPost() {
if(null OR has 5 minutes passed since last post) {
// set the new timestamp
return true;
}
else
{
return false;
}
}
I am scrapping data from web site using my java application and want to display the result after parsing code of html page in a Text Area made in Swing.
Text like: hello <b>every</b>one should be displayed as: 'hello everyone' in text area.
Thanks!!
Is there a method in JDK or apache commons to "pop" a list of elements from a java.util.List? I mean, remove the list of elements and return it, like this method:
public Collection pop(Collection elementsToPop, Collection elements) {
Collection popped = new ArrayList();
for (Object object : elementsToPop) {
if (elements.contains(object)) {
elements.remove(object);
popped.add(object);
}
}
return popped;
}
In Python, I can do this:
>>> import string
>>> string.letters
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
Is there any way to do something similar in Clojure (apart from copying and pasting the above characters somewhere)? I looked through both the Clojure standard library and the java standard library and couldn't find it.
I have a xml document like this rootXMLDoc=<root></root> . I need to insert paramxmlDoc= <parameter par='1'>abc</parameter>. how to insert paramxmlDoc to rootXMLDoc in java.?
Hi all,
Most google results for sample questions/problems for java, results in a link directing to mock certification questions. Does anyone know where can i find sample problems for practice ?
Thanks
What are the best practices for using Java's @Override annotation and why?
It seems like it would be overkill to mark every single overridden method with the @Override annotation. Are there certain programming situations that call for using the @Override and others that should never use the @Override?
Hi guys.
First I want to say is that I am 37 years old and not from programmer background (actually from biology). And my question is should I start learning Java? I have coded in PHP and JavaScript for a year and a half. Every answer would be appreciated.
Thanks in advance
Bobi.
I have a Class<? extends Annotation> and tried calling newInstance() but Java yelled at me for the obvious reason that I can't instantiate an interface. But I know frameworks like EasyMock are perfectly capable of instantiating interfaces. What would it take to get a completely dumb Annotation instance out of my Class?
For example:
a) int [x][y][z]
vs
b) int[x*y*z]
Initially thought i'd go with a) for simplicity
I know that Java doesn't store arrays linearly in memory like C does. But what implications does this have for my program?
I have no experience with MongoDB and we are trying to port a JPA application to be based on MongoDB. There are 3 drivers mentioned for porting java here. Which driver would be the easiest to use for converting my existing JPA application? Would it be morphia, mungbean or daybreak. Would prefer some practical experiences with users who have gone through this path before.
Is there a "best" or more popular database for standalone Java app?
I'm currently writing by hand, but I would like to know what is commonly done, if there is something that is commonly done.
I'm on my way to programming a database application and in our course we are told to implement a library of elements using one of the Java Collections. Each of the elements has a unique ID with which it's supposed to be addressed. Now I am wondering how this can be done.
I though about using a ListArray but this won't work because the only way of addressing List elements is through the index which you can't control.
Do you have some advice for me?
in java what is the syntax for commenting out multiple lines?
i want to do something like:
(comment)
LINES I WANT COMMENTED
LINES I WANT COMMENTED
LINES I WANT COMMENTED
(/comment)
This is sort of the Java analogue of this question about C#.
Suppose I have a String object which I want to represent in code and I want to produce a string literal that maps to the same thing.
I was just about to write a state machine that ingests the string character by character and escapes appropriately, but then I wondered if there was a better way, or a library that provides a function to do this.
Hi all,
I am tyring to merge an .mov file with a .wav file using java media framework, thus I need to know their duration. How can I do this? Any ideas would be appreciated..
I have a small Java Swing application that I want to rewrite in WPF .NET.
The application uses a JTable with an AbstractTableModel and a custom TableCellRenderer. I use my custom cell renderer to display the objects in two rows.
What is the corresponding WPF .NET component to JTable?
I need a Java code that takes tab delimited info from a file to a displayed table. The user should be able to click a row and update it, this is followed by updating the file. The code should use Swing objects.
Java Servlets - How do I detect if a user is from a mobile device?
I'm using the TinyMCE javascript editor, and it doesn't work on the iphone. How can I detect if the user is coming from a mobile device?
here's my problem: I have multiple classes that are part of the same package and they need access to a certain file path
String filePath = "D:/Users/Mine/School/Java/CZ2002_Assignment/src/"
Rather than declaring the same Filepath in every single class, is it possible to simply have a "global" type of variable of this FilePath so that all classes can access it and I only need to declare and update it once.
Thanks
How and where do you define your own Exception hierarchy in Java?
My main question concerns package location where they your Exception classes must be defined.
Do we create a special package ourexceptions and put all classes inside it?