So, hurray, there's no need to create a special file extension manually anymore.
The text 'Static Text' is the default. You can change the text in-line, which, if you follow the tutorial, should be "Hello Report World":
You can drag and drop the item around in the report. Notice also that it is in a clearly marked "Details" area. In fact, the whole Design view shows areas that match those found in the XML tags you'll find in the tutorial, for example "Details" is a clearly marked area, as is "Header". You can also stretch the item, with your mouse. When you right-click on the text item, you see this:
So, you can delete the item, adjust size and change properties. This is all very detailed. For example, when you click "Properties", you change font, alignment, size, and so on. (Although I haven't found a way to undo changes.)
When you look in the XML view, you see that this has been generated for the Details section of the report, for the static text item added above:
<band height="100" isSplitAllowed="true">
<reportElement height="30" key="staticText-1" width="60" x="124" y="33"/>
<box bottomBorder="None" bottomBorderColor="#000000" leftBorder="None"
leftBorderColor="#000000" rightBorder="None" rightBorderColor="#000000"
<text>Hello Report World</text>
Next, in the tutorial, you're told to add code to the Main.class generated by the IDE. You're also shown how code completion works, thanks to the Jasper JARs being available on the classpath.
With the JasperReports Visual Designer, you can very easily switch between views and preview your report as you go along, instead of needing to deploy the application each time.
Clearly, this is a very ambitious project, turning into a very mature tool that is going to be incredibly useful within the NetBeans community. Keep it up Toni! You're doing a fantastic job. If you're interested in this work, go to https://jarvis.dev.java.net/, check out the sources from CVS that you find there, and then just run the module suite that you end up with. I've done this successfully in 5.5.