J2me vs j2ee

which one of these technology is emerging which has better job security and which one has better future

Both.
They are different technologies aimed at different markets. A better way
of phrasing the question might be:
Which industry will pay me most?. Writing c*ap for servers or writing
c*ap for mobile phones.
Depends on the number of coders around and the number of projects that
need doing.
matfud

Similar Messages

Transfer from j2me to j2ee

Can anyone say is it possible to switch from j2me to j2ee later in the carreer????

Can anyone say is it possible to switch from j2me to
j2ee later in the carreer????he he he...
Let me tell you something buddy... the way the mobiles are becoming today, it is not far that the distinction between j2ee and j2me will be minimized, if u are talking about enterprise business apps made for mobiles. You can not probably build an enterprise app for mobile without the j2ee counterpart of the j2me app. And as I told u, as the world is heading today, people needs all info at his/her hand, so they will need it in their mobile only and how anything other than an ME app can serve their purpose that too with a rich GUI !!!
SUN once told, Net is the computer !! I'm waiting for the day when somebody will say MOBILE IS THE COMPUTER !!!
Regds
SD

J2ME and J2EE cross platform

Hi everyone,
Currently I'm developing a three tier architecture system. The presentation logic will be developed using J2ME while the business logic will be developed using J2EE. There are a lot of projects on this area. However, the projects are on web centric application. My system is to develop non web centric application. Therefore, I have some questions that need help from expert.
1. Is it possible to use J2EE to retrieve data from database and send the result to mobile phone? [NOTE: This is not an web application].
2. Should I use EJB to develop the application?
Thanks for your help and have a nice day.
With regards,
Teck Guan.

1. Is it possible to use J2EE to retrieve data from databaseYes, that's about 98% of what J2EE systems are for.
and send the result to mobile phone?If the mobile phone can talk HTTP to the J2EE server, yes.
2. Should I use EJB to develop the application? If you're using J2EE you don't have much choice about that.
But your question has nothing whatsoever to do with RMI.

Encryption between j2me and j2ee

I need to exchange some cofidential data between j2me client and servelt using http connection . So i need to encrypt the data before i send from j2me and the data should be decrypted at the server side so obviously i should also pass the key. I have searched on the net for a common algorthim that wil suit my requirements but i din get any useful solution. Please any one help me in finding out a algorithm tat meets my requirements.
I appreciate all the replies

i am getting the impression you are new to data security...
if this is indeed the case, and you are in any kind of hurry, i strongly advise you to use ssl if at all possible.
if you can not or will not use ssl then you will need to look into some other options.
there are multiple algorithms to choose from for secure key exchange, diffie-hellman prob being the most popular.
however, you will need to supplement the cldc api in order to implement.
some key words to search on:
diffie-hellman
rsa
aes
tripple des
satsa
bouncycastle
j2me security
j2me encryption

How j2me relates to WAP gateway?

Hello to everyone,
I want to know that,
Without using a wap gateway how j2me works?
According to me, Gateway is used to connect two different networks
Lets say I am calling a jsp page from MIDlet.
mobile devices belong to wireless network(j2me),
jsp(j2ee) is on internet.
How do these communicate ?
thank you in advance,
vishnu mahendra

Hi,
If u got answer for this the let me know
thanx in adv.
Raj

How to convert a .jad file to .class file in JAVA Swings.

Hi all,
Sorry for the interruption.I am also facing the same problem.I am using DEJDecompiler.But my application is not J2ME But J2EE.( a Swing application).I opened .class file and made some changes but I dont know how to convert into a .class file again.
I tried saving .jad file to .java file.Then it is showing lot of errors in Eclipse Platform.I doubt if there are any errors in the .class file already,then how could the program would run.I put all the programs in the respective platforms only and then testing.It fails.
(2) one more question,is if I do not need to disturb any existing coding and need to create a seperate java file which will do my customisation,then what should I do.I could not get any interfaces in the program.
Please help me as the matter is most urgent.
Thanks in advance
With regds
Satheesh.K

I tried saving .jad file to .java file.Then it is
showing lot of errors in Eclipse Platform.I doubt if
there are any errors in the .class file already,then
how could the program would run.I put all the programs
in the respective platforms only and then testing.It
fails.So who's Java program/library are you trying to steal?
(2) one more question,is if I do not need to disturb
any existing coding and need to create a seperate java
file which will do my customisation,then what should I
do.I could not get any interfaces in the program.
Please help me as the matter is most urgent.Wow, you urgently need to steal someones program/library. The best person to give you advice urgently is the owner of the program/library you are trying to steal.
Thanks in advancePlease don't thank me because I'm not going to help you!
With regds
Satheesh.K

Just some ideas would be nice

Hi,
Looking around for some innovative ideas for a project(FYP), I want to base my FYP on J2EE and/or J2ME, something like a front-end implementation(either web-based/mobile device) talking to back-end(mySQL/server integrated) through JSP. Mainly I want to play with JSP,Servlet,EJB,JDBC. I have a basic understanding of this technologies so it will be good to go in deep down.
However, I am lacking some ideas, as to which route to take, whether to explore J2ME with J2EE at this point or whether web-based systems are what i should be developing compared to mobile device systems. basically where is the demand now a days in the industry?.
It looks like most of the innovative/useful systems have been thought about/developed, (flight booking, shopping carts, online banking systems etc). Are there any web or mobile device based purposeful/useful system need researching/developing? something that could help the community. any ideas are very welcome.
I would appreciate any help.
thanks

I think you have to pay more than 10 Duke Dollars for a lucrative idea. give me a lucrative idea, priceless!
One that will teach Senator Orrin Hatch that
destroying a few million computers for the sake of the
entertainment industry is a bad idea.its the $18,000 which he earned in songwriting royalties which is talking and as long as he gets his CDs available on his website, he doesnt care about others. http://www.guardian.co.uk/usa/story/0,12271,980890,00.html
I think Randy Saaf of MediaDefender tried educating him about this, so there is no need to come up with a whole system to teach such a person.
However, i do not support copyright abuses. not fair.
anymore ideas?
You could kill two buzzwords with one stone, and develop a mobile->device app with J2ME that uses web services to communicate with a >server. Maybe it could be for buying movie tickets or something. 2-in-1, thought about it, even an m-commerce system such as m-banking system, reading about it, the security issues involving a bank is a project on its own. what you think of the idea?
It looks like most of the innovative/useful systems have been thought about/developed...
Why does it have to be original? Why not just pick something that's already done and make one that's faster/better in some way?
That's what Microsoft always does :-) Considering this too.
Here's and idea, write this for the SEC's members and you'll make a fortune.
http://story.news.yahoo.com/news?tmpl=story&cid=74&ncid=74&e=3&u=/cmp/20030619/tc_cmp/10700408thanks will read about it.
just to make things clear, I dont want a quick-get-rich scheme or a fortune yet, just a decent project where i can research & learn the technology.
thank you all for your time, more ideas are always welcome.

Web services and basic auth

Hi,
I'm trying to set up a web service that should use basic authentication as security solution. I've used the admin console to define security policies and left the 'Check roles and Policies for' in 'Web applications and EJBs protected in DD' for my default realm.
The security policy is set on the application inherited by the EJB and web service module.
All is well when accessing the web services from a Java client but when I try to access them from a .Net client I get an '401: Unauthorized' response.
If I change the 'Check roles and Policies for' setting to 'All Web applications and EJBs' the .Net client works but the Java client doesn't work anymore (it can't access the WSDL-file that it needs).
I've tried to set up authorization settings in the web.xml for the web service module but it doesn't seem to make any difference.
I use the WebLogic 8.1SP5 Server.

What is VB?
I know about J2ME, J2SE, J2EE, JMS, JNDI, JSP, JDBC, JAX-RPC, JAXP, JAXR, JAXM, JMX, JMI, JAF, JPDA and several other acronyms but I've never heard of VB.

Which one is more promising?

j2ee j2me
which one is more promising between j2me and j2ee in the future?

sunxf posted 5 topics before this one.
One has no responses.
4 have 9 responses between them.
sunxf didn't ever post back as to whether the responses were useful.
Why should we expect things to be different here?
db

Missing stackmap at target ALERT

Hi,
I am running my MIDlet and i receive this error message :
Error verifying method nanoxml/kXMLElement <init>(Ljava/util/Hashtable;ZZZ)V
Approximate bytecode offset 47: Inconsistent or missing stackmap at target
ALERT: Error verifying class nanoxml/kXMLElement
That is when I creat a new kXMLElement ....
source code :
try {
System.out.println("++ parsing XML\n");
kXMLElement doc = new kXMLElement();
doc.parseString(resultStringBuffer.toString());
if (doc.getTagName() != null) {
System.out.println(doc.getTagName());
} catch( kXMLParseException pe ) {
} catch( Exception ie ) {
System.err.println("Parsing error: " + ie);
and the kXMLElement constructor is :
public kXMLElement()
this(new Hashtable(), false, true, true);
I am running J2ME Java 2 Micro Edition Wireless Toolkit 1.0.3 on Linux RedHat 7.2 kernel 2.4.10 with $LD_ASSUME_KERNEL = 2.2.5.
any idea ? thanks
Fiorenzo

Hi!
I met the some error. Now I fixed it . you need compile the .java file(KnanoXML) using J2ME, not J2EE or J2SE.
You can try!
Harvey

Scja exam preparation 1.0 beta

hi,
I have done course in Java and Advance Java. I am planning to give SCJA
beta 1.0.
I have to give it before 15 July. I do not know what to refer. Please
provide me guidance.
Please suggest me books, sites, Links, documents any source of
information.
Please reply as soon as possible.
Please gentlemen I rely on you heavily.
I am unable to find more info. if you know any resource or anyone who can give me info pls. tell me.
Objectives of exam are
Section 1: Fundamental Object-Oriented Concepts
� 1.1 Describe, compare, and contrast primitives (integer, floating
point, boolean, and character), enumeration types, and objects.
� 1.2Describe, compare, and contrast concrete classes, abstract classes,
and interfaces, and how inheritance applies to them.
� 1.3 Describe, compare, and contrast class compositions, and
associations (including multiplicity: (one-to-one, one-to-many, and
many-to-many), and association navigation.
� 1.4 Describe information hiding (using private attributes and
methods), encapsulation, and exposing object functionality using public
methods; and describe the JavaBeans conventions for setter and getter
methods.
� 1.5 Describe polymorphism as it applies to classes and interfaces, and
describe and apply the "program to an interface" principle.
Section 2: UML Representation of Object-Oriented Concepts
� 2.1 Recognize the UML representation of classes, (including attributes
and operations, abstract classes, and interfaces), the UML
representation of inheritance (both implementation and interface), and
the UML representation of class member visibility modifiers (-/private
and +/public).
� 2.2 Recognize the UML representation of class associations,
compositions, association multiplicity indicators, and association
navigation indicators.
Section 3: Java Implementation of Object-Oriented Concepts Notes: code
examples may use the 'new' operator.
� 3.1 Develop code that uses primitives, enumeration types, and object
references, and recognize literals of these types.
� 3.2 Develop code that declares concrete classes, abstract classes, and
interfaces, code that supports implementation and interface inheritance,
code that declares instance attributes and methods, and code that uses
the Java access modifiers: private and public.
� 3.3 Develop code that implements simple class associations, code that
implements multiplicity using arrays, and recognize code that implements
compositions as opposed to simple associations, and code that correctly
implements association navigation.
� 3.4 Develop code that uses polymorphism for both classes and
interfaces, and recognize code that uses the "program to an interface"
principle.
Section 4: Algorithm Design and Implementation
� 4.1 Describe, compare, and contrast these three fundamental types of
statements: assignment, conditional, and iteration, and given a
description of an algorithm, select the appropriate type of statement to
design the algorithm.
� 4.2 Given an algorithm as pseudo-code, determine the correct scope for
a variable used in the algorithm, and develop code to declare variables
in any of the following scopes: instance variable, method parameter, and
local variable.
� 4.3 Given an algorithm as pseudo-code, develop method code that
implements the algorithm using conditional statements (if and switch),
iteration statements (for, for-each, while, and do-while), assignment
statements, and break and continue statements to control the flow within
switch and iteration statements.
� 4.4 Given an algorithm with multiple inputs and an output, develop
method code that implements the algorithm using method parameters, a
return type, and the return statement, and recognize the effects when
object references and primitives are passed into methods that modify
them.
� 4.5 Given an algorithm as pseudo-code, develop code that correctly
applies the appropriate operators including assignment operators
(limited to: =, +=, -=), arithmetic operators (limited to: +, -, *, /,
%, ++, --), relational operators (limited to: <, <=, >, >=, ==, !=),
logical operators (limited to: !, &&, ||) to produce a desired result.
Also, write code that determines the equality of two objects or two
primitives.
� 4.6 Develop code that uses the concatenation operator (+), and the
following methods from class String: charAt, indexOf, trim, substring,
replace, length, startsWith, and endsWith.
�
Section 5: Java Development Fundamentals
� 5.1 Describe the purpose of packages in the Java language, and
recognize the proper use of import and package statements.
� 5.2 Demonstrate the proper use of the "javac" command (including the
command-line options: -d and -classpath), and demonstrate the proper use
of the "java" command (including the command-line options: -classpath,
-D and -version).
� 5.3 Describe the purpose and types of classes for the following Java
packages: java.awt, javax.swing, java.io, java.net, java.util.
�
Section 6: Java Platforms and Integration Technologies
� 6.1 Distinguish the basic characteristics of the three Java platforms:
J2SE, J2ME, and J2EE, and given a high-level architectural goal, select
the appropriate Java platform or platforms.
� 6.2 Describe at a high level the benefits and basic characteristics of
RMI and threading.
� 6.3 Describe at a high level the benefits and basic characteristics of
JDBC, SQL, and RDBMS technologies.
� 6.4 Describe at a high level the benefits and basic characteristics of
JNDI, messaging, and JMS technologies.
�
Section 7: Client Technologies
� 7.1 Describe at a high level the basic characteristics, benefits and
drawbacks of creating thin-clients using HTML and JavaScript and the
related deployment issues and solutions.
� 7.2 Describe at a high level the basic characteristics, benefits,
drawbacks, and deployment issues related to creating clients using J2ME
midlets.
� 7.3 Describe at a high level the basic characteristics, benefits,
drawbacks, and deployment issues related to creating fat-clients using
Applets.
� 7.4 Describe at a high level the basic characteristics, benefits,
drawbacks, and deployment issues related to creating fat-clients using
Swing.
�
Section 8: Server Technologies
� 8.1 Describe at a high level the basic characteristics of: EJB,
servlets, JSP, JMS, JNDI, SMTP, JAX-RPC, Web Services (including SOAP,
UDDI, WSDL, and XML), and JavaMail.
� 8.2 Describe at a high level the basic characteristics of servlet and
JSP support for HTML thin-clients.
� 8.3 Describe at a high level the use and basic characteristics of EJB
session, entity and message-driven beans.
� 8.4 Describe at a high level the fundamental benefits and drawbacks of
using J2EE server-side technologies, and describe and compare the basic
characteristics of the web-tier, business-tier, and EIS tier.

hi,
I have done course in Java and Advance Java. I am planning to give SCJA
beta 1.0.
I have to give it before 15 July. I do not know what to refer. Please
provide me guidance.
Please suggest me books, sites, Links, documents any source of
information.
Please reply as soon as possible.
Please gentlemen I rely on you heavily.
I am unable to find more info. if you know any resource or anyone who can give me info pls. tell me.
Objectives of exam are
Section 1: Fundamental Object-Oriented Concepts
� 1.1 Describe, compare, and contrast primitives (integer, floating
point, boolean, and character), enumeration types, and objects.
� 1.2Describe, compare, and contrast concrete classes, abstract classes,
and interfaces, and how inheritance applies to them.
� 1.3 Describe, compare, and contrast class compositions, and
associations (including multiplicity: (one-to-one, one-to-many, and
many-to-many), and association navigation.
� 1.4 Describe information hiding (using private attributes and
methods), encapsulation, and exposing object functionality using public
methods; and describe the JavaBeans conventions for setter and getter
methods.
� 1.5 Describe polymorphism as it applies to classes and interfaces, and
describe and apply the "program to an interface" principle.
Section 2: UML Representation of Object-Oriented Concepts
� 2.1 Recognize the UML representation of classes, (including attributes
and operations, abstract classes, and interfaces), the UML
representation of inheritance (both implementation and interface), and
the UML representation of class member visibility modifiers (-/private
and +/public).
� 2.2 Recognize the UML representation of class associations,
compositions, association multiplicity indicators, and association
navigation indicators.
Section 3: Java Implementation of Object-Oriented Concepts Notes: code
examples may use the 'new' operator.
� 3.1 Develop code that uses primitives, enumeration types, and object
references, and recognize literals of these types.
� 3.2 Develop code that declares concrete classes, abstract classes, and
interfaces, code that supports implementation and interface inheritance,
code that declares instance attributes and methods, and code that uses
the Java access modifiers: private and public.
� 3.3 Develop code that implements simple class associations, code that
implements multiplicity using arrays, and recognize code that implements
compositions as opposed to simple associations, and code that correctly
implements association navigation.
� 3.4 Develop code that uses polymorphism for both classes and
interfaces, and recognize code that uses the "program to an interface"
principle.
Section 4: Algorithm Design and Implementation
� 4.1 Describe, compare, and contrast these three fundamental types of
statements: assignment, conditional, and iteration, and given a
description of an algorithm, select the appropriate type of statement to
design the algorithm.
� 4.2 Given an algorithm as pseudo-code, determine the correct scope for
a variable used in the algorithm, and develop code to declare variables
in any of the following scopes: instance variable, method parameter, and
local variable.
� 4.3 Given an algorithm as pseudo-code, develop method code that
implements the algorithm using conditional statements (if and switch),
iteration statements (for, for-each, while, and do-while), assignment
statements, and break and continue statements to control the flow within
switch and iteration statements.
� 4.4 Given an algorithm with multiple inputs and an output, develop
method code that implements the algorithm using method parameters, a
return type, and the return statement, and recognize the effects when
object references and primitives are passed into methods that modify
them.
� 4.5 Given an algorithm as pseudo-code, develop code that correctly
applies the appropriate operators including assignment operators
(limited to: =, +=, -=), arithmetic operators (limited to: +, -, *, /,
%, ++, --), relational operators (limited to: <, <=, >, >=, ==, !=),
logical operators (limited to: !, &&, ||) to produce a desired result.
Also, write code that determines the equality of two objects or two
primitives.
� 4.6 Develop code that uses the concatenation operator (+), and the
following methods from class String: charAt, indexOf, trim, substring,
replace, length, startsWith, and endsWith.
�
Section 5: Java Development Fundamentals
� 5.1 Describe the purpose of packages in the Java language, and
recognize the proper use of import and package statements.
� 5.2 Demonstrate the proper use of the "javac" command (including the
command-line options: -d and -classpath), and demonstrate the proper use
of the "java" command (including the command-line options: -classpath,
-D and -version).
� 5.3 Describe the purpose and types of classes for the following Java
packages: java.awt, javax.swing, java.io, java.net, java.util.
�
Section 6: Java Platforms and Integration Technologies
� 6.1 Distinguish the basic characteristics of the three Java platforms:
J2SE, J2ME, and J2EE, and given a high-level architectural goal, select
the appropriate Java platform or platforms.
� 6.2 Describe at a high level the benefits and basic characteristics of
RMI and threading.
� 6.3 Describe at a high level the benefits and basic characteristics of
JDBC, SQL, and RDBMS technologies.
� 6.4 Describe at a high level the benefits and basic characteristics of
JNDI, messaging, and JMS technologies.
�
Section 7: Client Technologies
� 7.1 Describe at a high level the basic characteristics, benefits and
drawbacks of creating thin-clients using HTML and JavaScript and the
related deployment issues and solutions.
� 7.2 Describe at a high level the basic characteristics, benefits,
drawbacks, and deployment issues related to creating clients using J2ME
midlets.
� 7.3 Describe at a high level the basic characteristics, benefits,
drawbacks, and deployment issues related to creating fat-clients using
Applets.
� 7.4 Describe at a high level the basic characteristics, benefits,
drawbacks, and deployment issues related to creating fat-clients using
Swing.
�
Section 8: Server Technologies
� 8.1 Describe at a high level the basic characteristics of: EJB,
servlets, JSP, JMS, JNDI, SMTP, JAX-RPC, Web Services (including SOAP,
UDDI, WSDL, and XML), and JavaMail.
� 8.2 Describe at a high level the basic characteristics of servlet and
JSP support for HTML thin-clients.
� 8.3 Describe at a high level the use and basic characteristics of EJB
session, entity and message-driven beans.
� 8.4 Describe at a high level the fundamental benefits and drawbacks of
using J2EE server-side technologies, and describe and compare the basic
characteristics of the web-tier, business-tier, and EIS tier.

Server/mobile connection

hey guys i really need ur help in this its highly important for me and am kind lost
so i got this idea for my graduation project is to create connection between smart phone and dedicated server ,to get ,retrieve,update and read data from the server through web application i will use j2me and j2ee technology but am still beginner in all this and here`s my 1st problem is the connection ,how can i connect my mobile to that server "hint this server should be inside a company "i tried to put an access point using the wifi , technology but i still having problems so plzzz any notes or articles or posts about this connection problem , i just need u guys to guide me where to search and does this will work in 1st place???

{color:#ff0000}Cross posted all over the place. Including this post --{color}{color:#0000ff}
http://forum.java.sun.com/thread.jspa?threadID=5224118
http://forum.java.sun.com/thread.jspa?threadID=5224119
http://forum.java.sun.com/thread.jspa?threadID=5224120
http://forum.java.sun.com/thread.jspa?threadID=5224122
http://forum.java.sun.com/thread.jspa?threadID=5224123
http://forum.java.sun.com/thread.jspa?threadID=5224124
{color}
{color:#000080}Cross posting is rude and multiple cross posters don't deserve a response.
db{color}

J2EE or J2ME ?

Hi everybody.
I came across the following: Wanting to build an J2EE webapplication (JSP and EJB) for the use on a PDA, I recently read something about J2ME for the first time .. Now I am wondering: Is my idea realizable with J2EE for a pocketPC ? Or do I need to switch to J2ME ?
As far as I understood, J2ME is only necessary, when developing straight in the PocketPC-platform, and not when dealing with webapplications which use PIE ?
I would be very pleased if someone can clear my confusion :-)
thanks in advance.
bye

Hi,
I have a 3rd solution for you: use small customizable J2ME client for the device and have it send chunks of necessary data to J2EE server over TCP/IP ;)
Peter

J2ME J2EE(servlet jsp) chat server

want to make a chat server using J2ME(fronend) and J2EE(server) . Could anybdy tell me some sample applications on the net or tutorials that can help

Darryl.Burke wrote:
Why, is Google broken?Hey you dont have to be rude to the guy ... suggest a few or dont reply

J2EE with J2ME ... Please help

Hello All,
I want to know if it is possible to make J2EE application communicate with J2ME application?
Actually I have developed a web application (J2EE application) which is needed to be run/accessed on a Tablet PC.
I am also supposed to provide Ink Enabled Control for some of the functionalities for this Web Application.
So, is this possible? If yes then can you please provide me some references for the same?
It would be a great help if you can share your thoughts on this issue.
Thanks in advance.
Twinkle

Here is a link to a section in the Swing tutorial that shows you how to use text components (JTextField, JTextArea, JEditorPane, JTextPane):
http://java.sun.com/docs/books/tutorial/uiswing/components/text.html

J2me vs j2ee

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