Try to create a DSL for a finite state machine.

Inspired by Chris vanBuskirk version on this site and the Ruby article at

http://www-128.ibm.com/developerworks/java/library/j-cb03137/index.html

/**
* GOAL: Write a quick-and-dirty DSL in Groovy that emulates Bruce Tate's
* example "acts_as_statemachine" Ruby code at
* http://www-128.ibm.com/developerworks/java/library/j-cb03137/index.html,
* within 20 minutes or less (i.e. steer clear of MOP-magic engineering ;).
*
* For more context, see the Apr'07 "Symbols" thread on the groovy-user mailing
* list.
*/

Using the SwingX JXMapViewer and using a special tile factory to retrieve Google Maps tiles, from a Groovy SwingBuilder.

This is an example from practice. The domain is a whater flow messure system. I wrote a blog entry where I fully described the evolution of this class - in german.

Recursively iterate over folders and files to check for differences.

Using a JGroups ReplicatedHashtable from Groovy

This is a very convenient way to remove all doubles from a List in Java. The only prerequisite is that the elements in the list have proper equals and hashCode methods.

It work by using the constructor of a Set that takes a Collection as an argument.

I poured the snippet in a little program so can run it straight away.

To create a chatprogram in java we need 2 classes one for Client and one for Server from which the client will be able to connect and exchange text messages. to compile the code simply type these commands in command prompt window:-
1)ipconfig(memorize the Ip address)
2)javac client.java
3)javac server.java
4)java server 10.69.23.203 (You need to type your own ip address)
5) After this you need to open another command prompt window(Make sure the server command prompt window is also open). now type:
java client 10.69.23.203
Thats it.
if anyone have any problems please post a comment and i will answer all of your questions or if you are having trouble in compiling.

This code illustrates using ruby REXML package. It converts J2EE web application deployment descriptor web.xml into Freemind mindmap document.

This class intended to collect TODO comments from java/c++/etc source files.

Example:

protected readFileData (String path) throws IOException {
// TODO: add try...catch block for IOException
InputStream is = new FileInputStream(path);
...
}


See also DirectoryScanner class.