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What is resource-ref in web.xml used for?
...figuration file.
So here's what happens: let's say you want to lookup the java:comp/env/jdbc/primaryDB name. The container finds that web.xml has a <resource-ref> element for jdbc/primaryDB, so it will look into the container-specific configuration, that contains something similar to the foll...
How to remove elements from a generic list while iterating over it?
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For those coming from Java, C#'s List is like ArrayList in that insertion/removal is O(n) and retrieval via an index is O(1). This is not a traditional linked list. It seems a bit unfortunate C# uses the word "List" to describe this data structure...
Android equivalent to NSNotificationCenter
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You could try this: http://developer.android.com/reference/java/util/Observer.html
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HttpServletRequest - how to obtain the referring URL?
I need to log URLs that are linking to my site in a Java Servlet.
4 Answers
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Remove file from SVN repository without deleting local copy
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When you want to remove one xxx.java file from SVN:
Go to workspace path where the file is located.
Delete that file from the folder (xxx.java)
Right click and commit, then a window will open.
Select the file you deleted (xxx.java) from the folder, and a...
What are Long-Polling, Websockets, Server-Sent Events (SSE) and Comet?
...ee HTTP above).
The client receives the requested webpage and executes the JavaScript on the page which requests a file from the server at regular intervals (e.g. 0.5 seconds).
The server calculates each response and sends it back, just like normal HTTP traffic.
Ajax Long-Polling:
A client req...
Handle spring security authentication exceptions with @ExceptionHandler
... private static final boolean jaxb2Present =
ClassUtils.isPresent("javax.xml.bind.Binder", MessageProcessor.class.getClassLoader());
private static final boolean jackson2Present =
ClassUtils.isPresent("com.fasterxml.jackson.databind.ObjectMapper", MessageProcessor.class.getClass...
Calculating distance between two points, using latitude longitude?
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The Java code given by Dommer above gives slightly incorrect results but the small errors add up if you are processing say a GPS track. Here is an implementation of the Haversine method in Java which also takes into account heigh...
Detect whether there is an Internet connection available on Android [duplicate]
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The code is good, I just wish people would stick to Java coding style when writing java haveConnectedWifi, haveConnectedMobile. I know it's a small thing, but consistent code is more readable.
– Stuart Axon
Dec 9 '10 at 16:37
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Key hash for Android-Facebook app
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the command should be executed in the bin folder of java in windows systems.
– Antrromet
Feb 15 '12 at 4:31
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