Update: I found out that i placed the jars files in the wrong folder. Beanshell is currently answering my oneliners! 
Anyhow, did anybody try to get jEdit working in Processing?

Greetings, Dipperson

jEdit is, to my knowledge, a Swing application. Swing and Processing doesn't mix well...
Side note: jEdit base component is used in the PDE. I am not thrilled by its possibilities... (but it is probably an old version).

I will try to make jEdit working in Processing because in the integration of BeanShell is really handy.
I tried to access the class manager in BeanShell, because i found out that if you type :
browseClass( "test.class" );
that it shows a really cool & handy class browser (you have to use the console to type this command!). I am still looking for the source of this one because i can't find it.
But, i found out in the source a link to http://www.ow2.org/ , i did find that really wierd but taking a look can't harm. At this website i found ASM is the only application that have many options that i was looking for, for example: A class reader, class writer, byte code, assembly code, types, methods, etc etc. All the things that BeanShell also uses.
I got the class reader working, but the class writer not. The last step, accessing the new class does not work. If you want to hide your code, ASM is a good option if you get the class writer working.

The class reader is really fast, for example, show me everything of java/lang/String:

Method : length name: ()I access : 1 Signature : null
size of array : 0
size of arguments and size of return value : 5
Int
----------
Method : isEmpty name: ()Z access : 1 Signature : null
size of array : 0
size of arguments and size of return value : 5
Boolean
----------
Method : charAt name: (I)C access : 1 Signature : null
size of array : 1
[0] I
size of arguments and size of return value : 9
Char
----------
Method : codePointAt name: (I)I access : 1 Signature : null
size of array : 1
[0] I
size of arguments and size of return value : 9
Int
----------
Method : codePointBefore name: (I)I access : 1 Signature : null
size of array : 1
[0] I
size of arguments and size of return value : 9
Int
----------
Method : codePointCount name: (II)I access : 1 Signature : null
size of array : 2
[0] I
[1] I
size of arguments and size of return value : 13
Int
----------

There is allot more info, but i don't think you don't want to see 500 lines of info you already know. :)

It makes me wonder what to integrate with each other. I like BeanShell allot because it's small, fast and it's a thread that can do almost everything (Java 1.1 but who needs 1.5?).

Greetings, Dipperson.

Update: I found the BeanShell classbrowser, i also found the sourcecode of it. I placed it all in Processing and hit run, and it works! You still need the BeanShell jar in the libraries folder or else it won't work.
Now i can examine the code and upgrade it to Quarks Guicomponents, because the classbrowser uses Swing.

Also, i found out that the BeanShell classwriter/classreader/types/opcodes comes from.... The ASM library.

If somebody is interested in the source, let me know.

Greetings, Dipperson