Wednesday, June 11, 2014
Thursday, March 27, 2014
java.lang.IllegalArgumentException: badly formated directory string
it is based on invalid format, try to give correct name structure for instance:
new X500Name("C=DE,O=Organiztion");
new X500Name("C=DE,O=Organiztion");
Tuesday, March 4, 2014
Sunday, February 23, 2014
Design patterns
Design pattern are solutions to a class of problem which is proven to be good. It's like following the big guys. The attached project contains easy to learn example for Factory, observer listener and strategy design patterns. This project will be updated with further patterns. Each if the downloadable project is an eclipse project , you can simply import it in eclipse if you wish.
Download all Project
Description of project via sample problems:
PROBLEM 1:
Say you want to create people in a computer game. People can be of type enemy army, friendly army or civilians (Also further more addition in future should be also possible). In this kind of problem you can use Factory pattern to create these game people.
PROBLEM 2:
Say in same game scenario you want to create Aeroplanes with different capability. Say 5 aeroplanes with military capability and 1 civilian (In future you should be also able to add more capabilities like speeds, payload types). In this kind of problem you can use Strategy pattern. You can create different capabilities and inject them in aeroplane.
PROBLEM 3:
Now say you have a game window. There are different buttons. You want to do different action in your Window class based to the location of the button clicked (Say button is developed by some other developer in his own way). In this problem you can use observer listener pattern.Window can be listener of button click event. Developer of the button should define a interface to add listeners.
Download all Project
Description of project via sample problems:
PROBLEM 1:
Say you want to create people in a computer game. People can be of type enemy army, friendly army or civilians (Also further more addition in future should be also possible). In this kind of problem you can use Factory pattern to create these game people.
PROBLEM 2:
Say in same game scenario you want to create Aeroplanes with different capability. Say 5 aeroplanes with military capability and 1 civilian (In future you should be also able to add more capabilities like speeds, payload types). In this kind of problem you can use Strategy pattern. You can create different capabilities and inject them in aeroplane.
PROBLEM 3:
Now say you have a game window. There are different buttons. You want to do different action in your Window class based to the location of the button clicked (Say button is developed by some other developer in his own way). In this problem you can use observer listener pattern.Window can be listener of button click event. Developer of the button should define a interface to add listeners.
Tuesday, November 5, 2013
HTML5 tutorial
Click to launch tutorial
- web workers: http://mydemo1.net78.net/html/webworker.html
- New form elements: TextInput, search, email, Tel, URL, Number, Range(slider), drop down list: http://mydemo1.net78.net/html/newInputTypeDemo.html
- Tag cloud: http://mydemo1.net78.net/html/tagcloud.html
- HTML5 audio, video: http://mydemo1.net78.net/html/audioVideoDemo.html
- Web storage: http://mydemo1.net78.net/html/localstorage.html
- IndexedBd: http://mydemo1.net78.net/html/indexedDB.html
Wednesday, June 19, 2013
Running 2 or more JBOSS in same machine:
To run 2 or more instance
of jboss follow the following step:
- First you need different installation location to run the another instance of the JBOSS. (assumption is that you already have a default instance running)
- This this example we are setting up jboss 5.1.0 as separate instance
- Go to bin : “jboss-5.1.0.GA\bin” and open “run.bat”
- Replace all the variable “%JBOSS_HOME%” with the direct path to your installation directory ie “jboss-5.1.0.GA”
if
exist "%JBOSS_HOME%\bin\run.jar" (
if
"x%JAVAC_JAR%" == "x" (
set
"RUNJAR=%JAVAC_JAR%;%JBOSS_HOME%\bin\run.jar"
)
else (
set
"RUNJAR=%JBOSS_HOME%\bin\run.jar"
)
)
else (
echo Could not locate
"%JBOSS_HOME%\bin\run.jar".
echo Please check that you are in
the bin directory when running this script.
goto END
)
With
if exist “<direct poath to
jboss home>bin\run.jar" (
if
"x%JAVAC_JAR%" == "x" (
set "RUNJAR=%JAVAC_JAR%;<direct
poath to jboss home>\bin\run.jar"
)
else (
set "RUNJAR=<direct poath
to jboss home>\bin\run.jar"
)
)
else (
echo Could not locate "<direct
path to jboss home>\bin\run.jar".
echo Please check that you are in
the bin directory when running this script.
goto END
)
- Run “run.bat”
[For
other version of installation eg: jbosss 7, you can do the same
thing,, ie go to “din/standlone.bat” and do 4)]
Wednesday, May 8, 2013
Heuristic Search videos
Basic of heuristic :
https://www.youtube.com/watch?v=jJ3CV3yhajMA* algorithm example
https://www.youtube.com/watch?v=kgr4AiV4eCYA* Algorithm optimality proof:
Heuristic search:
https://www.youtube.com/watch?v=xHocIAIPCEsstate space seach , 8 queen problem:
https://www.youtube.com/watch?v=M6V-TvwqwnUhill climbing:
https://www.youtube.com/watch?v=3PtuHl1rrT8state space search:
https://www.youtube.com/watch?v=FQWTa3XjyWginformed search: BF, A*
https://www.youtube.com/watch?v=6hmIKIWBVSIhttps://www.youtube.com/watch?v=tBn5gVXr0R4
A Quick Guide to the A* Algorithm :
https://www.youtube.com/watch?v=eTx6HQ9Veasminimum spanning tree
https://www.youtube.com/watch?v=R_zU-UYUCQU
AND OR GRAPH Search
http://www.youtube.com/watch?v=oPVj17gB7gY
21:20 > 34:04
iterative deepening:
https://www.youtube.com/watch?v=7QcoJjSVT38
some videos from me:
Back tracking on AND/OR graph
https://www.youtube.com/watch?v=9SFwT3n0nD0
Game tree:
https://www.youtube.com/watch?v=SO-oXQgvJt4
solving game tree:
6:00 > 11:00
alpha beta pruning introduction: 12:40
algorithm for alpha beta (example): 37:40
algorithm for alpha beta (ALGO): 47:40
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