Java Compiler J2SE vs. J2EE

Just wondering if the javac comiler is standard across editions. Is using classes from the J2EE api, do you need the appropriate compiler?

If by 'webapps' you mean things like Servlets, EJBs, etc, then you have to use a J2EE-based implementation, such as JBoss, Tomcat, Weblogic, etc, because the jar(s) they provide contain and implement the J2EE API, which is not in the standard J2SE stuff.

Similar Messages

Run time java compiler

Last year I researched oracle spatial technology and created prototype using oracle 9i, standalone oc4j. In order to start oc4j, i had to download java 1.4.2 from sun site. everything worked fine.
Now I am expanding on the prototype on different machine but am using oracle 10g. I followed the same steps (installed 10g, oc4j, downloaded j2se 1.4.2 and installed). When I start oc4j by following command
java -jar oc4j.jar, I get
error message stating Error loading package at file:/E:/oracle_downloads/oc4j/j2ee/home/applications/admin_ejb.jar, javac.exe no
t found under F:\oracle\product\10.1.0\db_1\jre\1.4.2, please use a valid jdk or
specify the location of your java compiler in server.xml using the <java-compil
er .../> tag.
I am not sure how do I specify location of java compiler in server.xml file sysntactically. I do not not recall this step with oracle 9i.
I edited server.xml and http-wev-site.xml as per instructions in my spatial class for mapviewer application but I need help on how to enter the location of java compiler file in server.xml file.
Thank you

You cannot use the JRE java to start oc4j. Must install a complete 1.4.2 J2SDK (not JRE) then use the java binary under its bin directory to start oc4j (not the one under jre/bin directory).
lj

J2SE to J2EE, beginning and need help

I am a J2SE developer and I need to learn J2EE. I am trying to figure out how to compile .java files that I write that use J2EE such as servlets. I am using eclipse and Textpad but I can't get either program to recognize J2EE classes. Is this possible? I have downloaded the J2EE SDK and started with some basic .jsp pages but I am more of a programmer than a web designer, and I really don't like using markup languages(HTML, XML). This is probably really stupid, but can anyone help me out or just give me some starting words of wisdom?

Make sure <J2EE_HOME>/lib/j2ee.jar is in your classpath:
DO:
javac MyServlet.java -cp path/to/j2ee.jar
OR
set your CLASSPATH env variable to include j2ee.jar
OR
throw j2ee.jar into your <JAVA_HOME>/jre/lib/ext directory.

Difference between J2SE and J2EE...

Hi all. I was wondering what the difference between J2SE and J2EE were. I mean in the code structure. Are the packages the same, like Swing, IO, things like that. I'm a bit of a beginner in Java, only been messing around with it for about 6 months now kind of in my spare time, and I know I'm in now way ready for J2EE, but it's something I think I'd like to maybe look into. I know it's for Enterprise Applications, much bigger scale than I'm used to, but fundamentally, how is it different? Different coding conventions? New packages not in J2SE? I hope what I want is coming across okay. Thanks for all the input.
James

J2EE defines a large number of specifications, in addition to J2SE. Examples are the Servlet, JSP, JMS, and EJB specifications. Most of those specifications are designed to have implementations running inside an Application Server. There are free implementations available such as JBoss (combined with for example Tomcat), and I think youre best bet to learn is to download one of those and go from there. Servlets and JSP are a good beginning, and then maybe move on to EJB and the rest.
Br - J

How to specify java compiler options in JDeveloper ?

I am using JDeveloper 10.1.2. I downloaded and installed JDK 5.0.
In my "Project Properties"->"Libraries" I created a new "JDK 5.0" J2SE Version and pointed to the new JDK5.0 execuitable. So far so good.
Now I need to compile all my source code with -source=1.4 option. How do I specify java compiler option "-source=1.4" in JDeveloper ?
Thanks
Sachin

Even before compilig I am not sure that by just going to "Project Properties"->Libraries and creating a new J2SE, I now have the new compiler working with JDEveloper. How do I test this ?

[DeployDecisionServices] Failed at Java Compilation

Hello,
i'm facing a problem when trying to deploy a decision service within a BPEL process. I have created some xml facts and rules with rule author. Everythings works fine also the compilation of jaxb classes and syntax check of RL output.
When using the rule repository in a BPEL process by creating a decision service and a decide activity the deployment stops during the compilation of the jaxb classes. As mentioned the compilation of jaxb classes on cmd works fine an it seems that the compilation during the deployment works fine as well as all .class files are beeing created in PROJECT_HOME%decisionservices\DecisionService\war\WEB-INF\classes. Nevertheless deployment stops at this point and I can't get my decision service deployed.
Any help is much appreciated !
The ant output:
| Deploying decision services for ruleTest on localhost, port 8888
[deployDecisionServices] Start of deploying decision services.
[deployDecisionServices] Deploy decision service in directory C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService
[deployDecisionServices] Start deploying decision service from directory C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService to J2EE context /rules/test/ruleTest/1.0/DecisionService
[deployDecisionServices] Replace placeholders in file C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\wsdl\DecisionService.wsdl
[deployDecisionServices] Replace placeholders in file C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\wsdl\DecisionService.wsdl done.
[deployDecisionServices] Replace placeholders in file C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\public_html\GetDecisionServiceInfo.jsp
[deployDecisionServices] Replace placeholders in file C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\public_html\GetDecisionServiceInfo.jsp done.
[deployDecisionServices] Start compiling fact type classes in directory C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes
[deployDecisionServices] Compiling from shell, src=C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes, classpath=C:\product\JDev\jdev\lib\ojc.jar;C:\product\JDev\ant\lib\ant-oracle.jar;C:\product\JDev\integration\lib\orabpel.jar;C:\product\JDev\integration\lib\orabpel-ant.jar;C:\product\JDev\integration\lib\orabpel-common.jar;C:\product\JDev\integration\lib\orabpel-thirdparty.jar;C:\product\JDev\webservices\lib\orawsdl.jar;C:\product\JDev\lib\xmlparserv2.jar;C:\product\JDev\lib\xml.jar;C:\product\JDev\j2ee\home\lib\oc4j-internal.jar;C:\product\JDev\j2ee\home\lib\adminclient.jar;C:\product\JDev\integration\bpm\support\files;C:\product\JDev\jdev\lib\jdev.jar;C:\product\JDev\ant\lib\xml-apis.jar;C:\product\JDev\ant\lib\xercesImpl.jar;C:\product\JDev\ant\lib\jakarta-oro-2.0.8.jar;C:\product\JDev\ant\lib\commons-net-1.3.0.jar;C:\product\JDev\ant\lib\ant.jar;C:\product\JDev\ant\lib\ant-xslp.jar;C:\product\JDev\ant\lib\ant-xalan1.jar;C:\product\JDev\ant\lib\ant-weblogic.jar;C:\product\JDev\ant\lib\ant-vaj.jar;C:\product\JDev\ant\lib\ant-trax.jar;C:\product\JDev\ant\lib\ant-swing.jar;C:\product\JDev\ant\lib\ant-stylebook.jar;C:\product\JDev\ant\lib\ant-starteam.jar;C:\product\JDev\ant\lib\ant-oracle-adfp.jar;C:\product\JDev\ant\lib\ant-nodeps.jar;C:\product\JDev\ant\lib\ant-netrexx.jar;C:\product\JDev\ant\lib\ant-launcher.jar;C:\product\JDev\ant\lib\ant-junit.jar;C:\product\JDev\ant\lib\ant-jsch.jar;C:\product\JDev\ant\lib\ant-jmf.jar;C:\product\JDev\ant\lib\ant-jdepend.jar;C:\product\JDev\ant\lib\ant-javamail.jar;C:\product\JDev\ant\lib\ant-jai.jar;C:\product\JDev\ant\lib\ant-icontract.jar;C:\product\JDev\ant\lib\ant-commons-net.jar;C:\product\JDev\ant\lib\ant-commons-logging.jar;C:\product\JDev\ant\lib\ant-apache-resolver.jar;C:\product\JDev\ant\lib\ant-apache-regexp.jar;C:\product\JDev\ant\lib\ant-apache-oro.jar;C:\product\JDev\ant\lib\ant-apache-log4j.jar;C:\product\JDev\ant\lib\ant-apache-bsf.jar;C:\product\JDev\ant\lib\ant-apache-bcel.jar;C:\product\JDev\ant\lib\ant-antlr.jar;C:\product\JDev\jdk\lib\tools.jar
[deployDecisionServices] Source file exists. Read Java source file names.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequest.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestImpl.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestType.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestTypeImpl.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponse.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseImpl.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseType.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseTypeImpl.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/ObjectFactory.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/ObjectFactory.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/Zustaendig.java to the list of Java sources to compile.
[deployDecisionServices] Adding C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/ZustaendigImpl.java to the list of Java sources to compile.
[deployDecisionServices] Compiled class(es) "C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequest.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestType.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestTypeImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponse.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseType.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseTypeImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/ObjectFactory.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/ObjectFactory.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/Zustaendig.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/ZustaendigImpl.java"
[deployDecisionServices] Error in ant execution: Java compilation failed.
Failed to compile file(s) "C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequest.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestType.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestTypeImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponse.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseType.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseTypeImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/ObjectFactory.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/ObjectFactory.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/Zustaendig.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/ZustaendigImpl.java".
Exception reported is: C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU\GeburtsurkundeProcessRequestTypeImpl.java:39: Class GU.AntragstellerType not found.
return (AntragstellerType) super.getElement("Antragsteller", "http://xmlns.oracle.com/Geburtsurkunde", (oracle.xml.jaxb.JaxbNode)obj, 0);
^
C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU\GeburtsurkundeProcessRequestTypeImpl.java:50: Class GU.AnschriftType not found.
return (AnschriftType) super.getElement("Anschrift", "http://xmlns.oracle.com/Geburtsurkunde", (oracle.xml.jaxb.JaxbNode)obj, 1);
^
C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU\GeburtsurkundeProcessRequestTypeImpl.java:61: Class GU.BankverbindungType not found.
return (BankverbindungType) super.getElement("Bankverbindung", "http://xmlns.oracle.com/Geburtsurkunde", (oracle.xml.jaxb.JaxbNode)obj, 2);
^
3 errors
Please verify that file C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequest.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestType.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessRequestTypeImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponse.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseType.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/GeburtsurkundeProcessResponseTypeImpl.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\GU/ObjectFactory.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/ObjectFactory.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/Zustaendig.java, C:\product\JDev\jdev\mywork\Buergerservice\ruleTest\decisionservices\DecisionService\war\WEB-INF\classes\ZS/ZustaendigImpl.java is valid java file or if all required libraries are included in your classpath.
classpath: C:\product\JDev\jdev\lib\ojc.jar;C:\product\JDev\ant\lib\ant-oracle.jar;C:\product\JDev\integration\lib\orabpel.jar;C:\product\JDev\integration\lib\orabpel-ant.jar;C:\product\JDev\integration\lib\orabpel-common.jar;C:\product\JDev\integration\lib\orabpel-thirdparty.jar;C:\product\JDev\webservices\lib\orawsdl.jar;C:\product\JDev\lib\xmlparserv2.jar;C:\product\JDev\lib\xml.jar;C:\product\JDev\j2ee\home\lib\oc4j-internal.jar;C:\product\JDev\j2ee\home\lib\adminclient.jar;C:\product\JDev\integration\bpm\support\files;C:\product\JDev\jdev\lib\jdev.jar;C:\product\JDev\ant\lib\xml-apis.jar;C:\product\JDev\ant\lib\xercesImpl.jar;C:\product\JDev\ant\lib\jakarta-oro-2.0.8.jar;C:\product\JDev\ant\lib\commons-net-1.3.0.jar;C:\product\JDev\ant\lib\ant.jar;C:\product\JDev\ant\lib\ant-xslp.jar;C:\product\JDev\ant\lib\ant-xalan1.jar;C:\product\JDev\ant\lib\ant-weblogic.jar;C:\product\JDev\ant\lib\ant-vaj.jar;C:\product\JDev\ant\lib\ant-trax.jar;C:\product\JDev\ant\lib\ant-swing.jar;C:\product\JDev\ant\lib\ant-stylebook.jar;C:\product\JDev\ant\lib\ant-starteam.jar;C:\product\JDev\ant\lib\ant-oracle-adfp.jar;C:\product\JDev\ant\lib\ant-nodeps.jar;C:\product\JDev\ant\lib\ant-netrexx.jar;C:\product\JDev\ant\lib\ant-launcher.jar;C:\product\JDev\ant\lib\ant-junit.jar;C:\product\JDev\ant\lib\ant-jsch.jar;C:\product\JDev\ant\lib\ant-jmf.jar;C:\product\JDev\ant\lib\ant-jdepend.jar;C:\product\JDev\ant\lib\ant-javamail.jar;C:\product\JDev\ant\lib\ant-jai.jar;C:\product\JDev\ant\lib\ant-icontract.jar;C:\product\JDev\ant\lib\ant-commons-net.jar;C:\product\JDev\ant\lib\ant-commons-logging.jar;C:\product\JDev\ant\lib\ant-apache-resolver.jar;C:\product\JDev\ant\lib\ant-apache-regexp.jar;C:\product\JDev\ant\lib\ant-apache-oro.jar;C:\product\JDev\ant\lib\ant-apache-log4j.jar;C:\product\JDev\ant\lib\ant-apache-bsf.jar;C:\product\JDev\ant\lib\ant-apache-bcel.jar;C:\product\JDev\ant\lib\ant-antlr.jar;C:\product\JDev\jdk\lib\tools.jar

Hi Everyone,
I've resolved the error. It was the fact that I was pointing to the wrong rmi port. I found out by typing out the "opmnctl status -l" on the command line and realised that my rmi port was 12401 instead of 23791. Hence, under the "deployDecisionServices" namespace in the build.xml file, I modified it from "rmiport="${rmiport}" to "rmiport="12401"" and deploy it and everything works. Thank you everyone for your time and efforts.
Regards,
John

J2SE and J2EE

what are the differences of J2SE and J2EE in terms of programming? I have used J2SE in developing java applets and standalone applications and now, I want to explore more with J2EE. I am reading articles and site regarding J2EE. But for you what is J2EE all about?.
Thanks!

To be frank, if you have to ask you don't need it. Learn most of what Java SE has and can do; then you'll have a sufficient knowledge base to understand and use Java EE as it's intended, on enterprise-level applications.
If you want more information read the documentation, as I don't care to digest it for you.

J2SE and J2EE Which with what ?

I am running Windows NT 4.0 server, with SP6a & Windows NT 4.0 work station, with SP6a. On reading the various combinations of J2Se and J2EE, which do I need to match. Also I am using ant 1.5.3 and looking at some CORBA 3 work using JacORB 1.4.1. I have been using J2SDK 1.4.1_02 for general jave work.
From what I have been reading it looks as if I need J2SE 1.3.1_02 with J2EE 1.3.1.
What is the real combinations of J2SE and J2EE needed for such a asystem ?
Also at present I do not particularly wish to move to a Win2000 Server/workstation combintion as yet.
Thanks
Omegaall

You may now download J2EE 1.4 which will be compatible with your existing installation of J2SE 1.4.1_02.
However, J2EE consists of the application server and additional tools. They are not required, nor are they recommended for heavy duty enterprise work; J2EE is simply a basic "reference" platform for you to get your feet wet on.
Other alternatives do exist, and if you've tracked down Ant, you probably already know about Tomcat, JBoss, WebSphere and a number of commercial engines. All of these packages essentially take J2EE and extend them further (or are faster, or are more reliable, etc etc).
If you have been asked to develop COBRA objects - as opposed to, and I stress this, as opposed to - merely being interested in the technology, then I strongly strongly strongly suggest you find out what your customer is using and set up a scheme similar to theirs. By developing to the same platform, you can save yourself a lot of deployment and packaging headaches, and essentially develop the objects "the right way" for that system.

Trouble opening Java Compiler

I am attempting to learn Java from scratch but am having trouble getting to first base ie. opening the Java Compiler on my Windows XP.
I have purchased "Learning Java" by O'REILLY which comes with a CDROM containing software including a Java Compiler called JAVAC.
Any thoughts anyone?
Cheers

you have to install the java compiler. The best place to do that from is java.sun.com. Follow this link
http://java.sun.com/j2se/1.5.0/download.jsp and download the jdk
and then you can follow the install instructions for windows XP. and after installation, you have to setup something called environment variables for Java. I can never remember how to do that, you can find out how to that from the installation guide of jdk. and after all of that, you will be able to run java programs

How to run a java program without Java Compiler

I have a small project and I want share it with my friends but my friend'pc have not
Java compiler.
for example, I writen a application like YM, then 2cp can sent,receive messege. My cumputer run as Server, and my frien PC run as client.
How can my friend run it? or how to create an icon in dektop tu run a java program..??..
(sorry about my English but U still understand what i mean (:-:)) )

To run a program you don't need a Java compiler. Just the Java Runtime Engine. That can be downloaded from the Sun website and comes with an installer.
You could then turn your application into an executable jar file and start it somehow like jar myYM.
There is also software that packs a Java program into an executable file. I've never used that but one that comes to my mind is JexePack. It's for free if you can live with a copyright message popping up every time you start the program.
http://www.duckware.com/jexepack/index.html

Javax.sound missing with Fedora Core 3 linux's java compiler?

I'm running Fedora core 3, and I did a complete install(selected all the packeges). I have the java compiler that FC3 installed. I can compile most things, but I seem to be missing the sound package/folder.
This leads to an error when I try to import the sound libraries.
//start code
//simple non-working example
import javax.sound.*;
class sounds
//end code
results in the error "The import javax.sound cannot be resolved"
I am trying to run a code snippet from javaAlmanac, and of course it won't work. Today, a friend of mine had the exact same problem on a windows machine using JDK 1.5.
I'm going to test this code out on a windows machine also.
Are there issues with the FC3 java compiler?
Has anyone else run into and solved this issue?
I'm considering copying the sound folder from some other Java installation, anyone try this?
Thanks,

I'm pretty new at this myself. I've also installed Fedora Core 3 on an AMD 64. When I do the same uname - a I get:
Linux localhost.localdomain 2.6.9-1.667 #1 Tue Nov 2 14:50:10 EST 2004 x86_64 x8 6_64 x86_64 GNU/Linux
Maybe you didn't install as 64 bit ?
I've also successfully installed Jave Runtime Environment. java -version gets me:
java version "1.4.2_08"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_08-b03)
Java HotSpot(TM) Client VM (build 1.4.2_08-b03, mixed mode)
I'd suggest installing 32 bit. I can't tell the difference when I run programmes that use 64 or 32 bits - it will be just as good.
Eurostar

Java Compiler API Status?

Does anyone know what the current status of JSR 199: Java Compiler API is?
(http://www.jcp.org/en/jsr/detail?id=199)
To me it seems the inclusion in JDK 1.5 was silently dropped. I have not found the smallest bit of information, though.

JSR199 is in suspended animation. For Tiger, we're
merely documenting the com.sun.tools.javac.Main entry
point.Hi,
where could this documentation be found?
Regards
Richard

Oracle Java Compiler 11g - JVM ERROR

Hi Jdev Team,
I have an issue to report,
Sometimes when run a project and navigate through the pages, i get the following error message:
Oracle Java Compiler 11g
Unable to create an instance of the Java Virtual Machine
Located at path:
H:\jdevstudio1111\jdk\jre\bin\client\jvm.dll
The only way to solve this is delete the settings of the Jdev and the Jdev from the PC, and install again, with the associated waste of time as consecuence. Please you can give a light to resolve this issue? Thanks
Well i correct what i just said.
The problem doesn´t fix, with the erase of the jdev program folder or settings folder in windows user docs and settings. What else i can do!?, out of ideas in here.
Regards,
Leo
Message was edited by:
LCJ

Solution (workaround):
Re: ADF table and filtering
Pedja

Oracle java compiler

Hi everyone,
I just wanted to create a new Project Build-Script as I stumbled upon this Checkbox (for auto-generating my Script):
"use oracle java compiler for javac task"
Can anybody tell me where I find a list of features this compiler provides in comparison to my normal compiler. (I tried JDev, Google and here...)
Are there any profits with using ADF / Business Components?
Hay.

Hay,
If you are using JDev 10g - you need to use OCJ to get some of the profiling aspects; less of a reason to use OJC in 11g.
John

Error in Java compilation: \s7u.log (The system cannot find the file specified)

Hi there,
I got an error when I tried to compile a group of sqlj and java files. The error below:
----------------------------------------------sqlj -status -passes -compile=true -ser2class -d=. -classpath=.;%CLASSPATH% E:\work\src\java\com\interadnet\persistence\*.sqlj E:\work\src\java\com\interadnet\persistence\*.java
out [Translating 53 files]
out [Reading file AdServerInformationType]
out [Reading file AdsType]
out [Reading file AgencyType]
out [Reading file CampaigntocompletionType]
out [Reading file CampaignType]
out [Reading file ChannelType]
out [Reading file ClientType]
out [Reading file CompletionType]
out [Reading file ContactType]
out [Reading file CreativeType]
out [Reading file FtpServerType]
out [Reading file InsertioninstructionType]
out [Reading file MediaServerType]
out [Reading file SystemPropertyType]
out [Reading file VendorType]
out [Reading file AdServerInformationTypeRef]
out [Reading file AdServerInformationView]
out [Reading file AdsTypeRef]
out [Reading file AdsView]
out [Reading file AgencyTypeRef]
out [Reading file AgencyView]
out [Reading file CampaigntocompletionTypeRef]
out [Reading file CampaignToCompletionView]
out [Reading file CampaignTypeRef]
out [Reading file CampaignTypeRefs]
out [Reading file CampaignView]
out [Reading file ChannelTypeRef]
out [Reading file ChannelTypeRefs]
out [Reading file ChannelView]
out [Reading file ClientTypeRef]
out [Reading file ClientTypeRefs]
out [Reading file ClientView]
out [Reading file CompletionTypeRef]
out [Reading file CompletionTypeRefs]
out [Reading file CompletionView]
out [Reading file ContactTypeRef]
out [Reading file ContactView]
out [Reading file CreativeTypeRef]
out [Reading file CreativeTypeRefs]
out [Reading file CreativeView]
out [Reading file FtpServerTypeRef]
out [Reading file FtpServerView]
out [Reading file InsertioninstructionTypeRef]
out [Reading file InsertioninstructionTypeRefs]
out [Reading file InsertionInstructionView]
out [Reading file MediaServerTypeRef]
out [Reading file MediaServerView]
out [Reading file SystemPropertyTypeRef]
out [Reading file SystemPropertyTypeRefs]
out [Reading file SystemPropertyView]
out [Reading file VendorTypeRef]
out [Reading file VendorTypeRefs]
out [Reading file VendorView]
out [Translating file AdServerInformationType]
out [Translating file AdsType]
out [Translating file AgencyType]
out [Translating file CampaigntocompletionType]
out [Translating file CampaignType]
out [Translating file ChannelType]
out [Translating file ClientType]
out [Translating file CompletionType]
out [Translating file ContactType]
out [Translating file CreativeType]
out [Translating file FtpServerType]
out [Translating file InsertioninstructionType]
out [Translating file MediaServerType]
out [Translating file SystemPropertyType]
out [Translating file VendorType]
out [Translating file AdServerInformationTypeRef]
out [Translating file AdServerInformationView]
out [Translating file AdsTypeRef]
out [Translating file AdsView]
out [Translating file AgencyTypeRef]
out [Translating file AgencyView]
out [Translating file CampaigntocompletionTypeRef]
out [Translating file CampaignToCompletionView]
out [Translating file CampaignTypeRef]
out [Translating file CampaignTypeRefs]
out [Translating file CampaignView]
out [Translating file ChannelTypeRef]
out [Translating file ChannelTypeRefs]
out [Translating file ChannelView]
out [Translating file ClientTypeRef]
out [Translating file ClientTypeRefs]
out [Translating file ClientView]
out [Translating file CompletionTypeRef]
out [Translating file CompletionTypeRefs]
out [Translating file CompletionView]
out [Translating file ContactTypeRef]
out [Translating file ContactView]
out [Translating file CreativeTypeRef]
out [Translating file CreativeTypeRefs]
out [Translating file CreativeView]
out [Translating file FtpServerTypeRef]
out [Translating file FtpServerView]
out [Translating file InsertioninstructionTypeRef]
out [Translating file InsertioninstructionTypeRefs]
out [Translating file InsertionInstructionView]
out [Translating file MediaServerTypeRef]
out [Translating file MediaServerView]
out [Translating file SystemPropertyTypeRef]
out [Translating file SystemPropertyTypeRefs]
out [Translating file SystemPropertyView]
out [Translating file VendorTypeRef]
out [Translating file VendorTypeRefs]
out [Translating file VendorView]
out [Compiling 53 Java files]
err*** The following character string is too long:
err***
out Error in Java compilation: \s7u.log (The system cannot find the file specified)
Any suggestion appreciated.
Daniel Huang

Having not seen this before, I assume that the issue is that the command line string is too long when Javac is invoked.
Here are a few things to reduce the size of the command line:
- do not use the CLASSPATH option, but set the CLASSPATH environment variable (you can to that in a .bat file)
- do not provide the .java files but rely on the implicit make capability in both, the SQLJ translator and the Java compiler. (Note: you must mention all of the .sqlj files that your program requires, do not rely on implicit make to find all of those.)
- you can perform the -ser2class conversion as a separate step (see the SQLJ FAQ), as well as the Java compilation
- there may or may not be a facility in your operating system to increase the size of the environment (and this may or may not have an effect on the maximum command line length)
- you could try to omit the -passes option and see if that helps (that may actually be where your invocation if failing in the first place, in that it cannot write to some temporary file).
Let us know how it goes. Thanks!

Java Compiler J2SE vs. J2EE

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