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Use of ANTLR to multiple Parsing

What I need : Find a way to parse a ttcn-3 source code or a ttcn-3 schema into XML or JAVA
I have looked on the internet to see if I can find an IDE or a program that helps me to parse a code in a ttcn-3 language and I have found the ANTLR website. Another tool for language recognition so I would like to know if someone has used ANTLR or knows if it can help me to parse.

Definitely yes. I know many people who have used ANTLR (including myself) and it can be used to solve your problem and parse your language if you can find a grammar for it.

creating a cluster from XML file

I am working on text analytics. I am using carrot2 api for Java through which I am reading an XML file and trying to generate the cluster. But I am unable to find any simple code snippet for the same. Can someone help me for the same.
Thanks in advance

Carrot2 JavaDoc overview has a number of code examples. Furthermore, the Java API package comes with more self-contained Java code examples.

Trying to find synonyms using wordnet java api

I am trying to find synonyms of some words(String type) in java using Wordnet java api. I have difficulties though in figuring out how it works.
I found this link http://lyle.smu.edu/~tspell/jaws/doc/edu/smu/tspell/wordnet/impl/file/ReferenceSynset.html#getTagCount%28java.lang.String%29 which I though it is useful, but still I don't know how to start. Do I have to create a ReferenceSynset object and then find its synonyms, and how can this be done? Or is there another easier way? Please help!
Thanks in advance!

JAWS - "Java API for WordNet Searching" has been created exactly for this purpose. It is possible that you haven't installed it right. In the same domain that you mention (smu.edu) there are instructions for installing JAWS.
First, you will need to download the executable and Wordnet itself.
Get the *.jar file
Download the wordnet database files to the appropriate directory (instructions here)
Once you have done this you should next try the example program. First, make sure that it works unmodified. If you get that working, you should see a bunch of synsets when you type:
java TestJAWS <your word here>
If that works, you can start modifying the code to suit your purpose.
Hope that helps.

Issues regarding building xforms editor?

Sorry this question might look a bit vague. But my problem description is I want to build an xForm editor (preferably in GWT). I would be very grateful if someone can suggest me some hints, links or material that I should be looking into to answer my following questions.
How I can generate the equivalent xml code as I drag and drop the controls in the editor?
And then how to ensure that this generated xml adheres to the xforms schema definition?

You can see how Orbeon Form builder works and if you think you want to develop something similar to that, then try looking at the code. Since Orbeon is open source developed on Java/J2EE you can get the source code. This would be a good starting point.
Cheers.

Java Jackcess Library Documentation?

I need to read and write some data on .mdb Access file and over the web I found the Jackcess library that that does exactly that.
Unfortunately I could't find any documentation to use that. On the library website there are a couple of examples, but no real documentation. Can anyone tell me if there's some sort of documentation somewhere?

The javadoc is intended to be fairly explanatory. The primary classes would be Database and Table. The library is also heavily unit tested, so you can dig into the unit test code to see many examples. There isn't currently a great "getting started" document. It has been discussed before, but, unfortunately no one has picked up the ball on actually writing it. That said, the help forum is actively monitored.
UPDATE:
There is now a cookbook, which is the beginnings of a more comprehensive user-level documentation.

You can use jackcess-orm that use DAO pattern and POJO with annotations.