I've always found processing command line parameters in Java something of a hassle. It's not hard, but it can be error prone and having to write the same code over and over is annoying. Here's a class I wrote that I find useful for this. Usage: String usage = “java ” + YourClass.class.getName() + ” … Continue reading Command Line Processing in Java →

The java.lang.instrument package allows a programmer to modify classfiles as they are loaded. No API for doing the modifications is supplied, but you can use ASM or BCEL etc to do that. This example prints out class names as they are loaded. package inst; import java.lang.instrument.ClassFileTransformer; import java.lang.instrument.IllegalClassFormatException; import java.lang.instrument.Instrumentation; public class Instrument { public … Continue reading JDK1.5: java.lang.instrument →

Earlier this year the Java blog world got very excited about Aspect Oriented Programming (AOP) and Java based frameworks to enable it. At the time the only AOF mature enough to be used was AspectJ, but now there are at least three other frameworks around designed to make AOP doable. I'm interested in this because … Continue reading A Journey through three Aspect Oriented Frameworks →

Sun's attempt to create a community – java.net – includes some weblogs. I'm a little cynical about how useful this site will end up. Most Sun-run website seem to end up with millions of questions like “I must create an Enterprise Java Website. Should I use Strings or StringBuffers” (okay, I made that up) or … Continue reading Weblogs at java.net →

The 1.5 million “words” I claimed JavaBlogs has needs to be clarified slightly. They are “words” as defined by running String.split(“\\W”) on all the posts archived. The [\W] regular expression is defined as a “A non-word character” – any character that is not in “a-zA-Z_0-9”. For normal english sentences from a book that is probably … Continue reading 1.5 Million Words in JavaBlogs? →