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I use Netbeans and I like it. Others may disagree as it is a mater of preference as far as I'm concerned.
Panic, Chaos, Destruction. My work here is done.
Drink. Get drunk. Fall over - P O'H
OK, I will win to day or my name isn't Ethel Crudacre! - DD Ethel Crudacre
I cannot live by bread alone. Bacon and ketchup are needed as well. - Trollslayer
Have a bit more patience with newbies. Of course some of them act dumb - they're often *students*, for heaven's sake - Terry Pratchett
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I have always used Eclipse as I find it easier to work with than NetBeans, but as the great Vilmos says: "ez egy mater preferencia".
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I'm using Eclipse too. Netbeans is too fancy, to much play around for me.
Eclipse is just right. Most developers I know are working with Eclipse.
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Its just a matter of preference only.. netbeans n eclipse... depends on person to person...
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Hi to all,
I am using Rich face components like datatable, extend datatable, combo box, button, text etc...
When ever this component is loading it is taking huge memory and later it is not release this memory (even I tried GC also) and reducing performance.
How to improve performance and free memory as soon as page close or after component used.
Thanks in advance.
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- when is the memory assigned?
- why is so much memory assigned? any special "things" in there that can use memory?
Do you need to dispose the components after using them?
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a) As soon as page loading memory is assigned but it is not releasing memory after user log out.
b) I am using rich component for that I am assigning value from Database (using BEAN).
Slowly server memory filling to max. any suggestion.
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You need to find it - good luck.
memory leaks can be a pain in the *ss. Complicated to find and often caused by a little thing.
Debug your database related stuff. Check the amount objects that are floating around in that area. You might be able to see which objects are causing the problems.
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I have a xml file scanned from a 2d barcode. The creator decided not to include the namespace info into the code so i have to add it after scanning the file. How can I do it in java?
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Is this meant to signify something?
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piticcotoc wrote: so i have to add it
Why?
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why what? add it?
because i have a xsd file to verify the xml which requires the namespace (otherwise it cannot validate the xml)
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piticcotoc wrote: (otherwise it cannot validate the xml)
Why do you need to validate the xml that you get from a bar code?
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to make sure it was scanned correctly and all the elements are written correctly
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Java$RMI$JDBC$Programming$Practice$$
!
Title:$Java$RMI$JDBC$Program$for$Automating$and$Controlling$Access$to$Buildings$
Delivery$Date:!!June!25
th
,!2012!
!
The objectiveof this! practice! is! to! gain! skills! in! Java!distributed!programming! and!
assimilate! the!main! concepts! and! techniques! of!RMI!JDBC!programming! and! SQL!
database!programming.!!
!
An!enterprise!has!a!number!of!buildings!in!a!Campus.!Each!building!has!a!name!that!
identifies!it!and!a!number!of!gates!to!access!it.!Buildings!have!floors.!Each!floor!can!be!
accessed! from! different! gates! and! has! a! number! of! rooms! (offices,! labs,! etc.).! The!
employees!of!an!enterprise!are!given!access!to!some!buildings,!and!within!a!building!
they!are!given!access!to!some!floors!and!within!a!floor!they!are!given!access!to!some!
rooms.!!
!
The!enterprise!is!interested!to!develop!software!that!would!automate!the!controlled!
access! to! buildings! and! would! permit! the! enterprise! to! monitor! the! access! of!
employees,!the!time!the!employees!stay!in!the!enterprise’s!facilities,!etc.!!
!
You!are!requested!to!design!and!implement!a!program!in!Java!RMI!JDBC!that!enables!
automatic!access!of!employees!to!the!buildings!of!the!enterprise.!!The!objective!of!this!
practice! is! to! develop! a!client/server!program! in! Java!RMI! JDBC!that!offers! to!the!
employees!(remote!clients)!the!following!options!through!a!contextual!menu
1
:!
!
1. Connect$a$remote$client$to$the$server$application:!A!client!(employee)!requests!to!
enter!the!application!by!providing!its!username!and!its!password.!!
1.1. if!the!username!and!password!(verified!at!the!database)!are!correct,!the!client!
enters!the!program!and!the!options!are!shown!to!him.!
1.2. the!username!or!password!(verified!at!the!database)!are!incorrect,!the!server!
should!notify!“You%don’t%have%access%to%the%application”.!
2. If!identified!correctly,!a!client!(employee)!can!access!any!facility!he/she!has!access!
to
2
!in!the!enterprise’s!facilities.!For!that,!the!client!is!requested!to!go!through!the!
following!steps:!
2.1. Access%to%a%building:!!
2.1.1. the!employee!is!requested!to!provide:!his!ID,!the!name!of!the!building!
and!the!access!gate!number!of!the!building.!
2.1.2. based!on!the!data,!the!server!checks!if!the!employee!has!granted!access!
to!the!building.!If!yes,!he!receives!the!message!“Access!permitted!to!
1
!A!Graphical!User!Interface!(GUI)!is!not!required,!but!would!be!positively!evaluated.!The!GUI!can!be!done!following!
a!similar!example!program!in!the!course!materials.!
2
!In!real!life!scenario!the!Access!would!be!done!with!a!ID!card!which!stores!the!data;!here!we!are!simulating!the!
process.
building!”!If!not,!he!receives!the!message!“You!don’t!have!access!to!this!
building!”!
2.1.3. The!employee!can!follow!next!step!to!enter!a!floor.!
2.2. Access%to%a%floor:!!!
2.2.1. the!employee!is!requested!to!provide!the!floor!number!and!the!access!
gate!of!the!floor.!
2.2.2. based!on!the!data,!the!server!checks!if!the!employee!has!granted!access!
to!the!floor.!If!yes,!he!receives!the!message!“Access!permitted!to!floor!”!If!
not,!he!receives!the!message!“You!don’t!have!access!to!this!floor!”!
2.2.3. The!employee!can!follow!next!step!to!enter!a!room.!
2.3. Access%to%a%room:!!!
2.3.1. the!employee!is!requested!the!room!number.!
2.3.2. based!on!the!data,!the!server!checks!if!the!employee!has!granted!access!
to!the!room.!If!yes,!he!receives!the!message!“Access!permitted!to!room!!
Enjoy!working”
3
!If!not,!the!employee!receives!the!message!“You!don’t!
have!access!to!this!room!”!
3. Disconnect$the!user!from!application!server:!the!employee!leaves!the!building.!The!
server!computes!the!time!the!employee!has!been!in,!and!the!employee!receives!
the!message!“You!have!stayed!….!time!in!the!building.!Good!bye!”!!
!!
For!the!application,!you!should!design!and!implement!a!database.!The!database!should!
have!tables!to!store!the!following!information!(and!other!information!that!you!may!
need!for!implementing!the!application):!!
• Employees:!information!on!all!employees!(clients):!Id,!name,!surname,!
username,!and!password.!
• Buildings:!information!on!buildings!and!their!access!gates.!
• Floors:$information!on!floors!of!a!building!and!their!access!gates.!
• Rooms:!information!on!rooms!of!a!floor!of!a!building.!
• Accesses:!access!rights!of!employees!to!buildings,!floors!and!rooms!
!
To!implement!the!program!follow!the!steps!below:!
!
1. Design!and!implement!the!database!in!postgresql!
2. Define!the!remote!interface!(only!one!remote!interface!in!this!case)!
3. Implement!the!remote!interface!
4. Implement!a!Java!server!application%
5. Implement!a!Java!client!application!that!uses!the!remote!interface.!
6. Compile!all!java!sources!(with!javac)!and!further!generate!stubs!and!skeletons!
(with!rmic)!
7. Deploy!and!run!the!application!(registry,!server!and!one!or!more!clients).!For!
running!and!testing!the!application!you!can!use!the!localhost.!
3
At!this!point,!the!server!saves!the!entry!time.
Notes:$
o The! practice!should!be!necessarily!done!in! groups! of! two! students.!No!
changes!are!allowed!once!groups!are!established.!
o You!can!use!the!java!classes!and!source!code!of!the!examples!used!during!
the!course.!
WHAT$TO$DELIVER:$
You!should!deliver!a!zip!file!named!surname1_surname2.zip!with!the!following:!
1. All!java!source!files,!!
2. All!objects!.class!files!
3. Two! sql! scripts:! one! for! creating! the! database,! another! one! for! inserting!
registers!(rows)!in!the!tables!of!the!database.!The!name!of!the!database!should!
be!AccessControl!
4. The!config.properties!file!
5. A!document!(doc!or!pdf)!including:!
a. Title!of!the!practice,!authors!and!delivery!date!
b. Problem!formulation!and!main!aspects!of!the!proposed!solution!
c. UML!design!
d. Database!design!(tables!and!relations,!EntitydRelationship)!
e. A! selfdevaluation,! indicating! which! objectives! of! the! practice! were!
achieved.!
f. A!manual!with!instructions!on!how!to!execute!the!program!
TO$WHOM$TO$DELIVER:$
Deliver!the!zip!file!to!Prof!Bexhet!Kamo!
WHEN$TO$DELIVER:$
On!or!before!25th!of!June!2012!
!
CHEATING:$
Attempts!at!cheating!at!practice!will!imply!failure!to!enter!the!exam.!
!
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Indrit Zeqiri wrote: Attempts!at!cheating!at!practice!will!imply!failure!to!enter!the!exam.!
Looks like you already failed.
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Indrit Zeqiri wrote: Can some one help me with this school project??
Did you want help with reporting you to your professor for cheating? Or did you have something else in mind?
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Thanks for giving me a good laugh.
There are so many things wrong with this post. Here are some:
- We don't do your homework for you.
- You pasted the entire assignment without formatting, so it is difficult to read.
- You forgot to read the last part of the assignment (CHEATING).
- You left the name of your professor in the post. One of the administrators of this site can probably use Google to find his contact info and report your attempt at cheating. 
Soren Madsen
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SoMad wrote: left the name of your professor in the post
I'm sure Professor Bexhet Kamo would like to be told one of his students is cheating 
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
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