I used Twitter4J as my library to log-in and post Twitter updates. I could create my own URL wrappers but why re-invent the lemonade right? so go and grab a copy of Twitter4J from http://yusuke.homeip.net/twitter4j/en/index.html and use your favorite IDE (I used Eclipse) to create your java class.
In order to pass the Twitter username and password I used the parameter values that you can setup in the Advanced tab of the iBot creation wizard. Then I referenced those two parameters within my java class like so:
Twitter twitter = new Twitter(jobInfo.parameter(0),jobInfo.parameter(1));
For the content to post, I used a modified version (removed HTML tags) of the Corporate Overview sample that is included with the Paint dashboard sample (Shared Folders/Paint Demo/Sales Summaries/Regional Analysis/Corporate Overview) which is a narrative view. I modified it and saved it to "My Folders". This is the text that will be posted to Twitter.
I setup the iBot as follows:
- Class Name: com.kerdock.delivers.DeliversToTwitter (the name of my Java class)
- ClassPath: kdqobiee.jar (the name of the jar containing the above class)
- Additional Class Path(s): twitter4j.jar (downloaded from the URL referenced above)
- Results: Pass delivery content to Java Program
- Other Parameters: two parameters containing my twitter username and password

Then I copied the jars (kdqobiee.jar and twitter4j.jar) to the appropriate folder (in my case is C:\OracleBI\web\javahost\lib)
Finally, when I save my iBot, my twitter status is updated with the text from the Answers view:

