Skip to main content

Annoyingly named methods

There's several annoyances I have with method names in the Java API - some are well documented as being ridiculous early design decisions that, well, couldn't be reverted without breaking backwards compatibility. Boolean.getBoolean() is a classic example for instance that really doesn't do what you'd expect.

However, there's another which is more recent that I haven't really heard complained about anywhere else. It's not a deal breaker by any stretch of the imagination, but it is a bad name, and it is mildly annoying.

I'm talking about the removeAll() method present on collection classes. It takes a collection of items to remove from that particular collection - pretty standard stuff. But to me, that should be called removeEach(),  removeAllOf(), or perhaps even just remove(), overloaded with the standard method that takes one parameter (to me the latter seems like the most logical choice.)

The problem I have with removeAll() is that it sounds like a method that you would call to do just that - remove all items from the collection. Wipe it. Now this isn't too bad, because if you get it wrong and call it with no arguments, it doesn't compile, and you can fix it pretty easily.

With JavaFX however, they've very helpfully added a var-args method with this name, that does the same thing. This may seem like a logical extension, but because it's a var-args method, passing no parameters, which does nothing, is a perfectly valid option. Not just at compile time, but at runtime as well. It all goes fine, apart from the method does absolutely nothing. It fails silently.

Perhaps a better implementation would have been to make it a two argument constructor, a "normal" reference to a parameter of type E, and then a var-arg list afterwards, essentially making it a "one or more" var-arg list. Granted, this would remove the ability to directly pass an array in - but an overloaded method expecting an array of that type could easily be added to get around that issue.

Anyway, rant over. Back to playing around with cubic Beizer curves for me!

Comments

Popular posts from this blog

The comprehensive (and free) DVD / Blu-ray ripping Guide!

Note: If you've read this guide already (or when you've read it) then going through all of it each time you want to rip something can be a bit of a pain, especially when you just need your memory jogging on one particular section. Because of that, I've put together a quick "cheat sheet" here  which acts as a handy reference just to jog your memory on each key step. I've seen a few guides around on ripping DVDs, but fewer for Blu-rays, and many miss what I believe are important steps (such as ensuring the correct foreign language subtitles are preserved!) While ripping your entire DVD collection would have seemed insane due to storage requirements even a few years ago, these days it can make perfect sense. This guide doesn't show you a one click approach that does all the work for you, it's much more of a manual process. But the benefits of putting a bit more effort in really do pay off - you get to use entirely free tools with no demo versions, it...

Dropbox Java API

This code will no longer work! It uses the old v1 API, which has been turned off. See here for working code with the latest v2 API. As well as being useful as general cloud storage, dropbox also has an API that lets you access its contents programmatically. It's a straightforward REST API with a number of language specific libraries to make the going a bit easier. Java is included on the list of SDKs, but at present only Android is included on the list of tutorials. This can be somewhat frustrating because simple examples using Java are lacking. Fortunately, the process was described by Josh here . So I've taken it and implemented it in Java, and it seems to work. It's a very basic example that authenticates with dropbox then uploads a file called "testing.txt" containing "hello world." Of course, more functionality is available than this, but this is the hard part (at least I found working this bit out the hard part.) Once you've got your Dro...

Using VLCJ for video reliably with out of process players

This post is really a follow on to the last, so if you want a bit of background give that a read through. In it I basically talk about the various options I came to when trying to implement video support in Java, and how I felt the best way to go was using out of process players and VLCJ. Before I get to the code, a warning - while this isn't stupidly hard, it's definitely not for beginners. If you're competent with Java in general you shouldn't have any trouble following - but this is not a cut / paste / forget the advanced stuff job! Eventually and depending on interest I may look into packaging it up into an easy to use library and distributing, but that day is not today! Secondly, this code is literally cut straight out of Quelea and at the moment is: Largely uncommented From an unreleased version Not the best quality May contain Quelea specific bits that don't apply Eventually, it'll all be refactored into beautiful OO-like niceness. But in terms of the con...