Morphex's blogologue (Life, technology, music, politics, business, mental health and more)

This is the blog of Morten W. Petersen, aka. morphex in various places. I blog about my life, and what I find interesting and/or important. This is a personal blog without any editor or a lot of oversight so treat it as such. :)

My email is

I am

An OGG/Vorbis player, implemented in Javascript.

My Kiva bragging page
My shared (open source) code on GitHub

Morphex's Blogodex

Me on Instagram

Zope hosting by Nidelven IT

Morten Petersen on Linkedin

Morten Petersen on Facebook

Morten Petersen on SoundCloud

Morten Petersen on MixCloud

Blogologue on Twitter

Older entries

Atom - Subscribe - Categories

Facebook icon Share on Facebook Google+ icon Share on Google+ Twitter icon Share on Twitter LinkedIn icon Share on LinkedIn

Can I Java cup of coffee? Isn't that valid?

Yesterday I made some progress on the twitter-exporter tool, working and thinking quite a bit in one day.

I'm surprised I am as productive as I am in Java, since I haven't used it in work-related projects. Yesterday it felt like I had a couple of cups of coffee too many, maybe it's the spring, but I was cranking out code and dealing with Exceptions like I'd been eating a lot of cake and drinking a lot of coffee.

I'm particularly pleased with this piece of code:

class TwitterStatusFetcher {
        Twitter twitter;
        ArrayList statuses = new ArrayList();
        Integer page = 1;
        Integer count = 20;

        TwitterStatusFetcher(Twitter twitter_) {
                twitter = twitter_;

        Status getNextStatus() throws TwitterException {
                if (statuses.isEmpty()) {
                        // See if more tweets can be found
                        ResponseList results = twitter.getUserTimeline(
                                new Paging(page, count));
                if (statuses.isEmpty()) {
                        return null;
                Status status = (Status) statuses.get(0);
                return status;

Which works with the twitter4j code and Twitter API to deliver one status at a time to the rest of my app code. Maybe it's not that big of a deal, but I found it elegant, and it does use the object-oriented paradigm that Java is big on.

It seems the most frequent mistake I make coming from Python, is forgetting the semicolon; I like to indent code regardless of language, so it's the semicolon that I forget.

I guess one thing I've found annoying about Java so far, is the type casting that is necessary at different places. I was working on some code which I guess was eventually removed, where I knew the method to call, but because of some abstraction in a method call, the returned objects were java.lang.Object, and calling a method, a String method I think, on that object failed in compilation.

I was also almost smacking my head yesterday, when I discovered that twitter4j returns shortened (and expanded) URLs in their Tweets as well, and thought I'd developed quite a bit of code for no good reason.

However, as it turns out, some tweets do contain shortened URLs that aren't mentioned in the Tweet metadata, so the class I wrote to resolve URLs still has some use. Phew.

Finally, I found Firefox now displayed the test.html output page as XML, instead of XHTML. So I made the code output a Unicode BOM, and Firefox says it is in standards compliance mode, and Chrome does not complain. However, the validator on, - still does not validate the page when it has a UTF-16LE BOM.

I'm not sure what's going on there, but to me it looks like the w3c validator isn't working.

A test.html page I just created is available at - just rename it to test2.html after download and open it in Firefox to see the rendered archive of my tweets.

[Permalink] [By morphex] [A Java-based tool to export tweets from Twitter for safe keeping (Atom feed)] [14 Apr 10:35 Europe/Oslo]