what is the need for J2EE?
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J2EE=Java Platform, Enterprise Edition        http://java.sun.com/javaee/downloads/
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Oracle9iAS Containers for J2EE - Release 2Date: 06/27/02\n\nHow-To: Message-Driven BeansAfter completing this how-to you should be able to: \nUnderstand how Message-Driven Beans (MDBs) work and why they're useful. \nBuild, deploy and run the sample application code. \nSoftware RequirementsOracle9iAS Containers for J2EE (9.0.3) Developer Preview is installed, available from OTN \nJakarta Ant 1.4, to build the application example, available here \nSun's JDK 1.3_01 or above, available here \nIntroductionThe EJB 2.0 specification provides for a new EJB component, the Message-Driven Bean. MDBs are not accessed directly, as are other EJBs, but instead listen on a message queue and respond to the arrival of appropriate messages. MDBs provide a simple and powerful paradigm for implementing asynchronous transactional applications in Java. You'll notice from the code that MDBs are simpler than Entity and Session Beans with respect to the fact that since they are not accessed directly, they do not require local, remote, or home interfaces. They only need a bean implementation class.\n\nIn the example below, you will build, deploy, and test a simple J2EE application to OC4J. The application comprises an MDB and a small web-application that enables you to insert messages onto a queue via your web browser. The MDB is only a single Java class. When the MDB receives messages off of the queue, it will report its findings to the command-line via standard output.\n\n\n\nPrerequisites for running the exampleTo run the sample application you must have: \nAdd the following JMS topic and topic connection factory in the jms.xml file in the $OC4J_HOME/config directory: \n<topic name="Demo Topic" location="jms/theTopic">\n<description>A dummy topic</description>\n\n</topic>\n\n<topic-connection-factory name="Demo Topic Connection Factory" location="jms/theTopicConnectionFactory">\n<description>A dummy topic connection factory</description>\n</topic-connection-factory>\nAlternatively, you may use the jms.xml file provided in the example files discussed below.\n\nUnpack example filesDownload the examples files (messagelogger.zip) and unzip it into a directory of your choice <example_home>.  The zip file contains the following files and directories:\n\nsrc/ - contains all Java source code for the example. \nejb/ \nmdb/ \nMessageLogger.java - Message-Driven Bean. \nweb/ \nlogmessageform.htm - HTML file. \nlogmessage.jsp - JSP that puts message on the queue. \netc/ \napplication.xml - Standard J2EE Application descriptor file. \nejb-jar.xml - Standard EJBs descriptor file. \nweb.xml - Standard Web Application description file. \norion-ejb-jar.xml - OC4J-specific EJB decriptor file. (Holds the MDB <-> Topic mapping. See below.) \njms.xml - Example for modifying OC4J config file. \ndoc/ \nreadme.htm- This document. \nbuild.xml - An Ant build file. \nThe orion-ejb-jar.xml file holds the Topic and TopicConnection mappings that tell the container how to associate the MDB with a message service. Here is part of the configuration presented in orion-ejb-jar.xml:\n\n<enterprise-beans><message-driven-deployment name="MessageLogger" \ndestination-location="jms/theTopic" \nconnection-factory-location="jms/theTopicConnectionFactory"></message-driven-deployment></enterprise-beans>\n\nCompiling and deploying the applicationUsing Ant and admin.jarFrom the root of the example directory [the directory where the build.xml file is located] execute the following command:  ant \n\n\nYou should now have a newly created messagelogger.ear file in your <example_home>&#92;lib directory. \n\n\nDeploy this J2EE application to a running instance of OC4J R2 by executing the following command from the <example_home>directory: \nant deploy-usingadmin.jar \n\nTest the application by accessing the web app at the URL
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A J2EE Application will be running on a webserver or a ApplicationServer. For example: If you are running your J2EE Application on tomcat. Browse to tomcat_root/logs/ and you will find files with names like localhost_log.2005-10-09. In this file you will get a stacktrace of problem with your J2EE Application.\n\nIf you are using any other application server like jboss, weblogic or websphere login to the respective site to find where you will find log files for that server.\n\nAn alternate solution is get log4j. This is an open source loggin tool developed by apache group. You can get the jar file into your webapp and start logging activity in your application. This will give you the power to log all the important activity in your application.\n\nThe most possible answer for your question is: Your webapp is not loaded by the webserver of application server. You need to configure the app.
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http://www.download.com/Java-2-Platform-Standard-Edition-J2SE-Runtime-Environment-JRE-5-0/3000-2417_4-10495818.html?tag=lst-0-1 Its all in here. Good luck.
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Go to the following site, download and install, and then it will run as required...\nhttp://www.java.com/en/download/index.jsp
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please be specific in ur question\n\nif u mean JSP iam providing u the link which helps
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Check your JAVA on your system.\nOr else download and reinstall it.\nwww.java.com\nDownload J2SE for your Operating System.\nIt may be Win XP, Win 2003.\nChoose it from Java's site and all you need is J2SE.\n\nEnjoy !!
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you need write code !!\n\nuse j2se and develop!!\njar and enjoy !\n\nit is not that easy !!
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Well using the database Oracle 10 lite it's not that difficult, but you need to know how to access it, you can read this book:\n\nBeginning J2ME: From Novice to Professional, Third Edition
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JRE is the java recource engin, and JVM is the java virtual machine. alone they should be able to run togeather. however, it really depends on what java program you are running. those may interfear with eachother.
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Download the enterprise version, that will have every support to the servlets, ejb, etc.\n\nhttp://java.sun.com/j2ee/1.4/download.html\n\nBut, you need application servers to run your servlets, ejb, etc.  You can download many free servers for your testing and learning purpose.
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Hi,\n\nI did the SCJA exam mid 2005 when it first came out. The exam covers just the basics of J2SE and J2EE, and does not require as much technical knowledge as the SCJP exam.\n\nI would suggest that you refer to Sun's website for details on the exam (click the certification link). There you can can get details of exactly what you will be tested on.\n\nThe links provided by the other answer above will definately help you as there are tutorials, sample papers,  etc on those sites.\n\nI would advise you to study as though you were going to take the SCJP exam, and do the sample papers on those sites for SCJP.\n\nYou might want to check out this site for tutorials, etc: http://www.javacamp.org/index.html
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Java refers to the programming language.\nIt's key features are:\n1. Your java source can run on multiple operating systems (Unix, Windows) due to the following architecture:\nA. Java source code is compiled into a platform independent byte-code \nB. Java byte-code is interpreted by a platform specific Java Virtual Machine (JVM).\n\n2. I think that the greatest benefits are of Java are that:\nA. It is a strongly typed (You don't have to deal with subtle errors caused by implicit type conversions - like an Array to a String)\nB. It is object oriented (see: wikipedia.org)  and has class-based inheritance (Easy re-use of functionality without the confusion of inheriting from multiple classes)\nC. It does not allow direct access to pointers to memory (prevents you from accidently reading from or writing to memory intended for another application)\nD. It is multi-threaded.  (For example, it's relatively easy to implement a word processor checks your spelling and grammar while you type.  You type in the main thread and the spell check runs in a separate thread, so your typing is not held up while the spell check runs.)\n\nj2se or Java 2 Standard Edition, contains the JVM and Compiler that I mentioned above under "key features"\nas well as an extensive set of built in classes.  Data Structures that ship with the j2se - such as the Collections API are a huge time saver for developers.\n\nJ2EE stands for "Java 2 Enterprise Edition".  \n"Enterprise" means distributed; this functionality allows you to run a component of your application in Boston and another component in Miami.\nKey features of J2EE include Servlets and Enterprise Java Beans (EJB's).
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Um...I think an Update of JAVA is needed. Dont you?\n\nwww.java.com
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community.java.net - Java Enterprise \nPopular Projects. Java BluePrints Solutions Catalog ... classes, and i explore how this might be useful in Swing EDT related programming. ...\nhttp://community.java.net/java-enterprise -\n\n\nA New Era for Java Protocol Handlers \nSecure class loading based on java.lang.SecureClassLoader. A rich GUI framework provided by Swing ... I work on Java projects in the real world. ...\nhttp://java.sun.com/developer/onlineTraining/protocolhandlers \n\n\n\nSpotlight \n... around Swing, the popular toolkit for building GUI's for Java desktop ... that are already involved in projects on java.net development are invited to ...\nhttp://today.java.net/today/projectspotlight.csp
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http://www.theserverside.com/articles/article.tss?l=J2EE-vs-DOTNET\nhttp://www.gotdotnet.com/team/compare/\nhttp://www.javaworld.com/javaworld/jw-03-2002/jw-0308-j2eenet.html\nhttp://msdn.microsoft.com/vstudio/java/compare/
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Make sure the compiled applet and any non-standard class it references is uploaded your server/web hosting account and that you have followed the instructions on the page http://java.sun.com/j2se/1.5.0/docs/guide/plugin/developer_guide/using_tags.html .