Wednesday, December 10, 2008
Funniest thing I read today:
"Autoboxing was a misguided effort to paper over Java’s early decision to have a segregated type system for primitives and objects. It was Java’s Plessy v. Ferguson decision that pretended primitives and objects were separate but equal; but the claim was no more true in Java than it was in American [...]
I spent a few hours this week trying to figure out why some date manipulation methods I was writing weren't working. In my test case, I had two instances of GregorianCalendar which I was comparing, an original and one that had been round-tripped through some conversion methods, via oracle.jbo.doman.Timestamp. Using the equals method, [...]
Sunday, February 10, 2008
Since migrating from JUnit 3, TestNG has been wonderful. Groups are the killer feature of TestNG that really make it worth the migration cost. When wanting to test a single method, I no longer need to manually comment or uncomment method names in the suite() method, I can just add a new group [...]
Here are the slides from my "Shards in your Latte" PJUG presentation on January 15:
javasharpedges.pdf
The Josh Bloch / Bill Pugh puzzlers talk from JavaOne given at Google. The Elvis example comes straight from here, and they do a better example of describing it than I did.
The Java Puzzlers book.
A couple of things that came [...]
Saturday, December 8, 2007
Inspired by Weiqi Gao's Friday Java Quiz this week, I came up with a few more curiosities of Java double. What do each of the calls to larger() print? Hint: this puzzle has nothing to do with type conversion loss of precision, it is only about the specified behavior of doubles.
public class Foo [...]
No, not that string theory. This string theory is testable. In fact, the moral of this story is this: don't make any assumptions about Java. The compiler or the VM. They do crazy stuff, like make your code run better. If you think you have an inefficiency in your [...]