How Jim Blandy Pronounces “Subversion”
Found this by accident and thought it was hilarious.
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Using the New java.io.Console Class
The 1.6 release of the JDK included a new java.io.Console class, which adds some new features to enhance and simplify command-line applications. Notably, Console includes a method specifically for reading passwords that disables console echo and returns a char array; both important for security. Scenario: Getting Username and PasswordGetting a user’s username and password is probably one of the more common …
Yummy Web Service Goodness
I’m not sure why I haven’t ventured into the realm of web services before this week. It probably has a lot to do with time (or lack thereof) and the type of projects I’ve worked on. But, I finally got my feet wet this week. My employer asked me to create a web service that …
Cloning an Object Using Reflection
Here’s a quick and dirty way to do a shallow copy of an object by overriding the clone method of Object. If you want to do deep copying, you’ll have to fidget with this a little more…or maybe I’ll do another blog about doing recursive cloning for deep copying. We’ll see. In order to make …
Sending Serializable Object Data to Standard Out
I can’t really think of a good reason why you’d want t send object data to std out (System.out), but I recently had a project requirement that a parent process read the output from a child process. The child process output was complex, so I wondered if I could send it as object data instead …
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JTree Drag and Drop Gotcha
Before adding Drag and Drop capabilities to my JTable, I read Java Tip 97 and Java Tip 114 from JavaWorld. They were fairly helpful, but I ended up doing things a little differently. In implementing my Drag and Drop JTree, however, I was plagued by a persistent exception: “InvalidDnDOperationException: Drag and drop in progress.” I debugged my code for hours …
Java News-reader Application
I started working on a news aggregator application as my semester project last month, but it has turned into much more than the simple RSS reader is started out as. It now reads all versions of RSS, RDF and Atom. I’ve also updated the GUI to have a nicer look and feel. Here’s are some screen captures. …
The RSS Version Fiasco
I’ve recently been extending my Java RSS/Atom feed reader to support more versions of RSS. In doing so I’ve discovered that the version history of RSS is a lot more complicated than I’d thought. One would assume that the version history was linear from 0.9 through 2.0, but one would be wrong. Versions 0.9, 0.91, …
New System Tray API in JDK 6 (Mustang)
Robert Eckstein writes: The latest beta version of the Java 2 Platform Standard Edition 6.0 version (Mustang) now lets you access the system tray in Java with the help of two separate classes in the java.awt package: SystemTray and TrayIcon. These classes give you the ability to add graphics, popup menus, and floating tip functionality …
Rendering HTML in your Swing Applications
I recently wrote a news reader application (RSS only at the moment) that displays the messages using HTML. In doing so, I discovered the terrible state of the javax.swing.text.html.HTMLEditorKit. From the Javadoc: The default support is provided by this class, which supports HTML version 3.2 (with some extensions), and is migrating toward version 4.0. Migrating toward …