How do you check if a one-character String is a letter - including any letters with accents? I had to work this out recently, so I'll answer it myself, after the recent VB6 question reminded me. ...
Here is my problem: I've got a dialog with some parameters that the user can change (via a spinner for example). Each time one of these parameters is changed, I launch a thread to update a 3D view according to the new parameter value. If the user changes another value (or the same value again by clicking many times on the spinner arrow)...
My code takes an interface as input but only excercises a couple of the interface's methods (often, just getters). When testing the code, I'd love to define an anonymous inner class that returns the test data. But what do I do about all the other methods that the interface requires? I could use my IDE to auto-generate a stub for the i...
Working on a project that parses a log of events, and then updates a model based on properties of those events. I've been pretty lazy about "getting it done" and more concerned about upfront optimization, lean code, and proper design patterns. Mostly a self-teaching experiment. I am interested in what patterns more experienced designers ...
Hi, I use the recent Ganymede release of Eclipse, specifically the distro for Java EE and web developers. I have installed a few additional plugins (e.g. Subclipse, Spring, FindBugs) and removed all the Mylyn plugins. I don't do anything particularly heavy-duty within Eclipse such as starting an app server or connecting to databases, ...
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? ...
I have a handful of projects that all use one project for the data model. Each of these projects has its own applicationContext.xml file with a bunch of repetitive data stuff within it. I'd like to have a modelContext.xml file and another for my ui.xml, etc. Can I do this? ...
Say I have some javascript that if run in a browser would be typed like this... <script type="text/javascript" src="http://someplace.net/stuff.ashx"></script> <script type="text/javascript"> var stuff = null; stuff = new TheStuff('myStuff'); </script> ... and I want to use the javax.script package in ja...
A third-party application reads some Java code from an XML file, and runs it when a certain event happens. In Java, I want to tell a .NET 3.5 application, running on the same machine, that this event occurred. The total data transferred each time is probably a few characters. What is the best way of using Java to tell the .NET process t...
In C# and in Java (and possibly other languages as well), variables declared in a "try" block are not in scope in the corresponding "catch" or "finally" blocks. For example, the following code does not compile: try { String s = "test"; // (more code...) } catch { Console.Out.WriteLine(s); //Java fans: think "System.out.println" ...
I am trying to write a simple networked chat program in Java. I have almost no networking experience. I was wondering what resources I should begin looking at (beside here of course). Sticking with the core Java API would be best for now. ...
I'm using the following code to query a database from my jsp, but I'd like to know more about what's happening behind the scenes. These are my two primary questions. Does the tag access the ResultSet directly, or is the query result being stored in a datastructure in memory? When is the connection closed? <%@ taglib prefix="sql" uri=...
I'm new to .Net and I'm trying to understand the basics first. What is the difference between MSIL and Java bytecode? ...
I have: class MyClass extends MyClass2 implements Serializable { //... } In MyClass2 is a property that is not serializable. How can I serialize (and de-serialize) this object? Correction: MyClass2 is, of course, not an interface but a class. ...
If a class defined an annotation, is it somehow possible to force its subclass to define the same annotation? For instance, we have a simple class/subclass pair that share the @Author @interface. What I'd like to do is force each further subclass to define the same @Author annotation, preventing a RuntimeException somewhere down the roa...
Had a conversation with a coworker the other day about this. There's the obvious which is to use a constructor, but what other ways are there? ...
I have a serial hardware device that I'd like to share with multiple applications, that may reside on different machines within or spanning multiple networks. A key requirement is that the system must support bi-directional communication, such that clients/serial device can exist behind firewalls and/or on different networks and still t...
I have a series of functional tests against a web application that correctly run, but each require the class level setup and teardown provided with the @BeforeClass and @AfterClass annotations, and hence require JUnit 4.0 or above. Now I want to perform load testing using a small number of these functional tests, which simulate a large ...
We'd like a trace in our application logs of these exceptions - by default Java just outputs them to the console. ...
I'm writing a report view of an audit trail, and I need display this in a .jsp. What's the "best" way to get the data from the database to the screen? We're using Spring for dependency injection, Data Access Objects, and Hibernate. I can use hibernate or straight jdbc for this report. If I load all the records into memory I run out of ...