Example for java bean

Hi,
can someone please tell me what a java bean is and show me a very basic example using a java bean.
Thanks in advance for any replies
Jim.

When ever I have questions like this "Tutorial" just screams though my mind, take a look, it is exactly what you want:
http://java.sun.com/developer/onlineTraining/Beans/

Similar Messages

Problems with the ActiveX bridge for Java beans when using third-party .jar

I encountered the following problem when using the ActiveX bridge for a java bean:
I am using JDK 1.4.2_09 and MS Visual Basic 6.0 (SP6). I wrote a java bean called ProcessViewer (my class ProcessViewer inherits from JComponent and implements the interfaces Serializable and AdjustmentListener) which I would like to use within a VB 6.0 application. I used the ActiveX bridge (packager.exe) to generate a DLL (ProcessViewer.dll) and registered it successfully. The java bean GUI-control works fine within my VB 6.0 application unless my java bean (ProcessViewer.jar) uses any third-party .jar files.
But when I tried to add a reference to some third-party class (com.sap.xxx.xxx....) I got some problems. I could solve the problem with packager.exe by setting the correct CLASSPATH. But at runtime my VB 6.0 application does not work. It crashes or it reports an error like this: "The control ... could not be loaded from axbridge.dll" (although I deployed my .jar file correctly to the directory C:\Programme\Java\j2re1.4.2_09\axbridge\bin and lib). Setting the CLASSPATH environment variable before calling my VB 6.0 application (exe) did not solve the problem.
How can I teach my VB 6.0 application (containing the Java bean ActiveX control) where to find the third-party .jar file? Copying the third-party .jar file to the JRE lib-folder or to the axbridge\lib folder did not solve the problem either.
I studied the documentation about the ActiveX bridge given at:
http://java.sun.com/j2se/1.4.2/docs/guide/beans/axbridge/developerguide/index.html
but I am missing informations on how the third-party .jar files can be found during runtime of the ActiveX container (e. g. a VB 6.0 application).

See how to solve your problem with JNI:
http://codeproject.com/cpp/OOJNIUse.asp
More examples (for SWING) in tools setup:
http://www.simtel.net/product.php[id]95126[SiteID]simtel.net
http://www.simtel.net/product.php[id]94368[SiteID]simtel.net
http://www.simtel.net/product.php[id]93174[SiteID]simtel.net

Examples for JAVA ME in Blu Ray

Are there any code examples for using Java in Blu-Ray DVD players?

For CS4 you must update the Roxio component http://forums.adobe.com/thread/400484?
More on Encore and Roxio http://forums.adobe.com/thread/528582?tstart=0 or direct to
http://kb.roxio.com/search.aspx?URL=/content/kb/General%20Information/000070GN&PARAMS
Also, Run as Administrator http://forums.adobe.com/thread/771202?tstart=0
tstart=0

RMI-IIOP Example for Java SE 6

Hi.
Can someone provide me an example (link or code) of how to write an RMI-IIOP remote object, bind it to jndi (glassfish) and then call it from within the glassfish application server (I'm calling from an EJB).
The guide available at http://java.sun.com/javase/6/docs/technotes/guides/rmi-iiop/tutorial.html is unfortunately not helpful because it the code there does not work when binding the remote object in glassfish JNDI (using empty InitialContext constructor) as opposed to the orbd daemon that is described in the guide.
Am I not allowed to bind RMI-IIOP objects in glassfish application server JNDI, i.e. do I have to use orbd?
Do you have to generate stubs for the remote objects in Java SE6? The tutorial says to do it but the exception I get on glassfish application server is not from the _<interface-name>Stub.java but rather from <interface-name>_DynamicStub.java.
Any help is greatly appreciated!

Are you trying to create an RMI-IIOP server inside an
Application Server (Glassfish)?I'm not really sure about how it all works but I don't think so. I am exporting my Remote objects (using PortableRemoteObject) from a standalone Java SE client app. Relating this to normal RMI I had assumed that this automatically started an RMI-IIOP server on an anonomous port, although I now see that the javadoc says that the export method only "Makes a server object ready to receive remote calls.", whatever that means. So if calling the export method doesn't start an RMI-IIOP server then I'm guessing I would have to start one, and then yes, if possible, I would like to do it in glassfish and avoid starting up more applications.
I am guessing I am missing something fundamental here..
The tutorial uses the JNDI Registry (tnameserv). (and
it works fine)Is that what is automatically started when glassfish application server is started?
Have you looked into using a Portable Object Adapter?No, I have not. I want to keep it as simple and close to regular RMI though, so if possible I would like to avoid POA.

Cannot deploy the Bookstore Example for Java EE tutorials

I also have the same issue as another user on a different thread, and I did check my build.properties and it appears accurate. However I am still getting the exception when I try to run the 'ant create-tables' or 'ant deploy' :
Buildfile: build.xml
-pre-init:
init:
check:
tools:
start-db:
[exec] Database already started on host localhost, port 1527.
[exec] Command start-database executed successfully.
delete-tables:
[sql] Executing file: C:\tutorial\javaeetutorial\examples\web\bookstore1\${db.delete.src}
BUILD FAILED
C:\tutorial\javaeetutorial5\examples\bp-project\database-ant.xml:48:java.io.FileNotFoundException: C:\tutorial\javaeetutorial\examples\web\bookstore1\${db.delete.src} (The system cannot find the file specified)
Total time: 7 seconds
The Build.Properties file in my [install]/examples/bp-projects/ directory is a follows
javaee.home=C:/Sun/AppServer
javaee.tutorial.home = c:/tutorial/javaeetutorial5
javaee.server.name=localhost
javaee.server.port=10000
javaee.adminserver.port=4848
javaee.server.username=admin
javaee.server.passwordfile=c:/tutorial/javaeetutorial5/password.txt
appserver.instance=server
I was able to compile the first Hello tutorial with Ant, so I am assuming that means the above build.properties file should be correct (or else that deployment would have failed too, right?). I also created the JDBC connection in the System Admin Console before trying this, as per the tutorial text.
Since I'm new to the environment, I'm not sure where else to look for the problem.

Ok, I did an 'ant deploy' at the books directory. It seems to be going well and then just hung for minutes at the following line...
check:
tools:
-pre-deploy:
-pre-init:
init:
check:
tools:
start-db:
[exec] Database started in Network Server mode on host localhost and port 1
527.
[exec] --------- Derby Network Server Information --------
[exec] Version: CSS10011/10.1.1.0 Build: 208786 DRDA Product Id: CSS10011
[exec] -- listing properties --
[exec] derby.drda.maxThreads=0
[exec] derby.drda.keepAlive=true
[exec] derby.drda.minThreads=0
[exec] derby.drda.portNumber=1527
[exec] derby.drda.logConnections=false
[exec] derby.drda.timeSlice=0
[exec] derby.drda.startNetworkServer=false
[exec] derby.drda.host=localhost
[exec] derby.drda.traceAll=false
[exec] ------------------ Java Information ------------------
[exec] Java Version: 1.5.0_06
[exec] Java Vendor: Sun Microsystems Inc.
[exec] Java home: C:\Sun\AppServer\jdk\jre
[exec] Java classpath: C:\Sun\AppServer\lib\appserv-rt.jar;C:\Sun\AppServe
r\lib\admin-cli.jar;C:\Sun\AppServer\javadb\lib\derby.jar;C:\Sun\AppServer\javad
b\lib\derbytools.jar;C:\Sun\AppServer\javadb\lib\derbynet.jar;C:\Sun\AppServer\j
avadb\lib\derbyclient.jar
[exec] OS name: Windows XP
[exec] OS architecture: x86
[exec] OS version: 5.1
[exec] Java user name: Russell Longo
[exec] Java user home: C:\Documents and Settings\Russell Longo
[exec] Java user dir: C:\Sun\AppServer
[exec] java.specification.name: Java Platform API Specification
[exec] java.specification.version: 1.5
[exec] --------- Derby Information --------
[exec] JRE - JDBC: J2SE 5.0 - JDBC 3.0
[exec] [C:\Sun\AppServer\javadb\lib\derby.jar] 10.1.1.0 - (208786)
[exec] [C:\Sun\AppServer\javadb\lib\derbytools.jar] 10.1.1.0 - (208786)
[exec] [C:\Sun\AppServer\javadb\lib\derbynet.jar] 10.1.1.0 - (208786)
[exec] [C:\Sun\AppServer\javadb\lib\derbyclient.jar] 10.1.1.0 - (208786)
[exec] ------------------------------------------------------
[exec] ----------------- Locale Information -----------------
[exec] ------------------------------------------------------
[exec] Starting database in the background. Log redirected to C:/Sun/AppSe
rver/javadb\derby.log.
[exec] Command start-database executed successfully.
I hit a Ctrl-C and it asked if I wanted to end the batch. I replied 'n' but it dropped out to the command line.
So I tried the ant deploy again and got the following...
check:
tools:
-pre-deploy:
-pre-init:
init:
check:
tools:
start-db:
[exec] Database already started on host localhost, port 1527.
[exec] Command start-database executed successfully.
delete-tables:
[sql] Executing file: C:\tutorial\javaeetutorial5\examples\web\books\${db.
delete.src}
BUILD FAILED
C:\tutorial\javaeetutorial5\examples\web\books\build.xml:51: The following error
occurred while executing this line:
C:\tutorial\javaeetutorial5\examples\bp-project\database-ant.xml:48: java.io.Fil
eNotFoundException: C:\tutorial\javaeetutorial5\examples\web\books\${db.delete.s
rc} (The system cannot find the file specified)
I finally went to the bookstore directory to see if I could deploy that application. Ant deploy gave the following:
check:
tools:
-pre-deploy:
-pre-init:
init:
check:
tools:
start-db:
[exec] Database already started on host localhost, port 1527.
[exec] Command start-database executed successfully.
delete-tables:
[sql] Executing file: C:\tutorial\javaeetutorial5\examples\web\books\${db.
delete.src}
BUILD FAILED
C:\tutorial\javaeetutorial5\examples\web\books\build.xml:51: The following error
occurred while executing this line:
C:\tutorial\javaeetutorial5\examples\bp-project\database-ant.xml:48: java.io.Fil
eNotFoundException: C:\tutorial\javaeetutorial5\examples\web\books\${db.delete.s
rc} (The system cannot find the file specified)
Last, I went to bookstore1 just to try the ant deploy again, see if things were cleared up, and maybe the errors above wouldn't affect it. When I tried deploying I got the following...
check:
tools:
-pre-deploy:
-pre-init:
init:
check:
tools:
start-db:
[exec] Database already started on host localhost, port 1527.
[exec] Command start-database executed successfully.
delete-tables:
[sql] Executing file: C:\tutorial\javaeetutorial5\examples\web\books\${db.
delete.src}
BUILD FAILED
C:\tutorial\javaeetutorial5\examples\web\books\build.xml:51: The following error
occurred while executing this line:
C:\tutorial\javaeetutorial5\examples\bp-project\database-ant.xml:48: java.io.Fil
eNotFoundException: C:\tutorial\javaeetutorial5\examples\web\books\${db.delete.s
rc} (The system cannot find the file specified)
I'm clearly not 'getting' a handle on this environment.

Approach of Java Bean Model: What is the best way?

Hi Experts,
In our project, we are trying to connect Oracle Database and display the tables and information in it on Web Dynpro View.
For this I'm following 4 step procedure broadly:
1. Java DC: a) Create Class files --> one for connecting Database (JDBC Connectivity) ; other only having Input and Output variables with corresponding getter & setter methods ;and one more class file having all methods. I make Jar file out of this class files and store that within that DC project under _comp folder.
2. Ext Lib DC: a) Copy the created Jar file in Library and make 2 public parts (one PP for compile time and other PP for assembly time).
3. SAP J2EE DC: a) Create DC of type Library and above create PPs is added to this library.
4. Web Dynpro DC: a) Add SAP J2EE DC of Library Type in my Used DCs. b) This will make the JAR file created in Java DC to be available in options of " Jars from Pubilc Part" and use all these class files as Models. And Using them we access the Oracle DB and get access to data.
This proved to long exercise. I want to know if there is any other approach available other than this. I'm aware EJB Models approach, but this will be hit on my performance, so want to avoid this. Yet if any shorter approach is available.
My Idea behind this long approach is from the SDN provided example on Java bean where in Web Dynpro Project uses a local jar file created from Java project which wraps a EJB Module project and Enterprise Application project. So in DC perspective if we have to include jar file we have to make it public part.
<a href="/people/valery.silaev/blog/2005/09/14/a-bit-of-impractical-scripting-for-web-dynpro from Valery : A bit of (impractical) scripting for Web Dynpro</a> was in great help for making jar file exposed as Public part.
I want opinions and suggestion on this regard and best available approaches.
Thanks in advance
Srikant

D.V.,
Here is an option to trun steps 1-4 into 1-2
As far as you are using your Java classes only from WD DC-s, then:
1. Put all your Java source in WD DC, create single public part for compilation. Bonus: you may create JavaBean model right here and add it to public part as well.
2. In other WD DC-s refer public part created above and add run-time reference (via Project -> Properties) to corresponding DC. Now you can use both Java classes and JavaBean model.
Valery Silaev
SaM Solutions
http://www.sam-solutions.net

Column Not found error while trying to access databse through JSP+Java Bean

I am trying to acees MS Access 2003 db through JSP using Tomcat 5.0.28.The code for accessing the databse is incorporated in the bean.The jsp only calls the particular method of the bean .
Code for Java Bean:
package ActiveViewer;
import java.sql.*;
import java.util.*;
public class CompanyBean
Connection con;
ResultSet rs=null;
Statement st;
     public CompanyBean(){}
     public void connect()
     try
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
System.out.println("Here4");
con=DriverManager.getConnection("jdbc:odbc:activeviewer","","");
     System.out.println("Here1");
     catch (ClassNotFoundException e)
     System.out.println("Could not locate driver.");
catch (SQLException e)
System.out.println("An SQL Exception has occured :: "+e);
     e.printStackTrace();
     catch (Exception e)
System.out.println("An unknown Exception has occured :: "+e);
     e.printStackTrace();
public void disconnect()
     try
     if (con!=null)
con.close();
     catch (SQLException e)
System.out.println("An SQL Exception has occured :: "+e);
     e.printStackTrace();
public ResultSet select(String username)
if(con!=null)
     try
st=con.createStatement();
     rs=st.executeQuery("select * from company where username='" + username + "'");
catch (SQLException e)
System.out.println("An SQL Exception has occured :: "+e);
     e.printStackTrace();
catch (Exception e)
System.out.println("An Exception has occured while retrieving :: "+e);
e.printStackTrace();
else
System.out.println("Connection to database was lost.");
return rs;
The code for JSP that uses the above bean is:
<%@ page language="java" import="java.sql.*,ActiveViewer.* " contentType="text/html"%>
<jsp:useBean id="conn" scope="session" class="ActiveViewer.CompanyBean" />
<html>
<body>
<% String username=request.getParameter("username");
String password=request.getParameter("password");
System.out.println("username:"+username);
System.out.println("password:"+password);
conn.connect();
ResultSet rs=conn.select(username);
System.out.println("Below select ");
while (rs.next())
String dbusername=rs.getString("username");
     String dbpassword=rs.getString("password");
     if(dbusername.equals(username) && dbpassword.equals (password))
{ %> out.println("OK");
          <% }
else { %>Invalid Username and / or Password.
<br>Clickhere to go back to Login Page.
<% }
} %>
</body>
</html>
I get the following error:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Column not found
though the database is not int he same folder as the jsp, the DSN is set correctly to pint to the db location.The jsp does print in stdout file:
Here4 (from connect method above)
Here 1 (from connect method above)
Below Select (from jsp)
This means that the jsp does connect to db but it gives the above error.Also the field name also matches that in the database and data is present in the db too.
All other things like creating package for bean,incorporating the packakage are done.
Can someone please help me with their precious advice?

U're getting this error because there is no field called 'password' in ur database, the field in ur database is named 'cpassword' and not 'password'. So change the statement rs.getString("password"); to rs.getString("cpassword");

How to store multiline string literal in to java bean shell variable

Hello Experts
How to store multiline string literals in java bean shell like we use triple quote for jython variable
Using Jython
str=""" helllo
welcome to my world"""
above syntax is working but not for java bean shell like below
String str=""" hello
welcome to my world""";
So how to do this in java bean shell. I came to this scenario while storing logs to a variable. I believe there is no solution for storing multiline strings to java bean shell variable.
<@
String str="<%=odiRef.getPrevStepLog("MESSAGE")%>";
@>
Any suggestion will be highly appreciated.
Thank You.

maddythehunk wrote:
Im trying this but its not working...
while(billingQueryParamsItr.hasNext()) {
     billingQueryParam = (BillingQueryParam) billingQueryParamsItr.next();
     System.out.println("****** Param Name-->"+billingQueryParam.getParamName());
     String[0] name = billingQueryParam.getParamName(); // giving error ; expected
     //billingItemActionForm.setParamName(billingQueryParam.getParamName());
Declare the array outside of the loop. Fill the array as you iterate. And stop putting your error messages inside of comments in the code.

Java Bean v/s EJB

Hi All,
Could anyone explain to me what is the difference between a normal Java Bean and an enterprise java bean (EJB). And when would one go for Java Beans and When for an EJB ??
I am a newbie in J2EE. Please Help...
Thanks in advance,
Arun

Its ok man.Refer to the documentaion on the same site. You wil get the ansewrs.
-Kshitij.

How to Map Java Beans to appropiate ActionScript class ??

Hi
I find it difficulty in writing a ActionScript class for java Bean.
Is there any automation tool avialable which will generate an ActionScript class basing on the java Bean ??
Thanks in advance .

I think GraniteDS has a tool for it.

Java.beans.Statement & java.sql.Statement

My old code from jdk1.3.1 throws the ambiguous class thingie-mo-bob. Why did they implement the new java.beans.Statement, and is there anyway to make it default to the old java.sql.Statement without having to go through all the old code and add import java.sql.Statement. I have like 200 jsp files 'n it will take a loooong time!
Pete

There r two ways to do this.
(i) One is Implement the java.sql.Statement
like
package java.beans;
public interface Statement implements
java.sql.Statement {
}What? Are you suggesting he edit the source code for java.beans.Statement and make it implement java.sql.Statement?? I would most certainly not suggest that solution- beside violating the licensing agreement, it has troubling consequences since you are basically redefining the structure of a class in a way that makes no functional sense- that is, there is no reason for java.beans.Statement to implement methods like getConnection() and the other signatures of java.sql.Statement.
I'm not sure if I'm reading your response correctly or not, but I would definitely not refactor java.beans.Statement just to get this problem solved with out editing files ... ... since java.sql.Statement is used so widely, perhaps they should have considered a different name for java.beans.Statement , although you hate to base a name off of what's going to cause the least problems, rather then what makes the most sense ... ... any way, I guess it doesn't matter now: the name has been selected .... I'd be interested to hear how you solved the problem.

Where does java beans be to locate in jsp?

I've problem to understand where Tomcat looks for Java Beans
- testbean.jsp:
<html>
<title>Prova beans</title>
<body>
<jsp:useBean id="test" class="lta.FirstBean" />
</html>- i've put FirstBean.class in:
MyDomain->MyFolder->WEB-INF->classes->lta->FirstBean.class
When i launch testbean.jsp, it returns the error below:
org.apache.jasper.JasperException: /provabean.jsp(5,0) The value for the useBean class attribute lta.FirstBean is invalid.
     org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)
     org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
     org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:150)
......I have also try to put file class in:
MyDomain->WEB-INF->classes->lta->FirstBean.class
but i got the same error.
Can someone helps me?
Thks in advance

I don't like it. I think you should deploy Web apps
under Tomcat the way Tomcat expects to see them:
http://jakarta.apache.org/tomcat/tomcat-5.0-doc/appdev/
ndex.htmlI follow your suggest but i get another problem.
I created an application in $CATALINA_HOME/webapps/myapps and i put all *.jsp files in it, then i configured workers2.properties to send only *.jsp and servlet request to Tomcat with:[uri:<mydomain>/*.jsp]
info=My application folder for Host <mydomain>
worker=ajp13:localhost:8009
[uri:<mydomain>/servlet/*]
info=Prefix mapping
worker=ajp13:localhost:8009Everything works fine with *.jsp but not for servlets.
In server.xml:
<Host name="<mydomain>" appBase="jakarta-tomcat-5.0.27/webapps/<mydomain> " debug="0">
<Context path="" docBase="">
<Logger ....>
</Host>Perhaps i must configure the Context parameters ...

Help required in building up the Java Bean for an XML data

Hi ,
I want to build a Java bean which will actually represent an xml data . The class will be named as User and it will typically represent the data in the follwing xml:
<user>
<cwsId>barbete</cwsId>
<firstName>William</firstName>
<lastName>Barber</lastName>
<status>true</status>
<role>
<roleCode>1000000177</roleCode>
<roleName>Customer Administrator</roleName>
</role>
<language>en</language>
<country>US</country>
<preferences>
<equipmentGroup>2717</equipmentGroup>
<dateFormat>MON-dd-yyyy</dateFormat>
<timeFormat>HH:MI AM</timeFormat>
<timeZone>-12:00</timeZone>
<daylightSavings>Y</daylightSavings>
<location>NC</location>
<recordsPerPage>10</recordsPerPage>
<historyPeriod>3</historyPeriod>
<distanceUnit>MILE</distanceUnit>
<fuelUnit>G</fuelUnit>
<unitIdDisplay>E</unitIdDisplay>
<smuUpdate>W</smuUpdate>
<countries>
<country>
<countryCode>GB</countryCode>
<countryName>UNITED KINGDOM</countryName>
</country>
<country>
<countryCode>US</countryCode>
<countryName>UNITED STATES</countryName>
</country></countries>
</preferences>
</user>
Now for single child nodes like cwsId of the main user node i have kept properties like
private String cwsId;
But i am not sure as to how to represent the nodes which contain subnodes like "preferences"node. Any ideas?What is the standard practice?

One thing you could do is create an object model first, which will contain all the data for your user.
then all you need in the bean is a Hashtable with the name of the user as a key, and the user-object (which is actually the complete object model) as a value.
with the XML stated by you, you would get an object model something like this:
Class User
    String cwsid;
    String firstName;
    ArrayList<Role> roles = new ArrayList<Role>(); //I'm assuming a user can have more then one role.
    ArrayList<Country> countries = new ArrayList<Country>();
class Role {
    String code;
    String name;
class Country {
    String code;
    String name;
}And so on for all the varioous elemets of your XML.

Hi, I have quick question about use of USEBEAN tag in SP2. When I specify a scope of SESSION for the java bean, it does not keep the values that I set for variable in the bean persistent.Thanks,Sonny

Make sure that your bean is implementing the serializable interface and that
you are accessing the bean from the session with the same name.
Bryan
"Sandeep Suri" <[email protected]> wrote in message
news:[email protected]..
Hi, I have quick question about use of USEBEAN tag in SP2. When I
specify a scope of SESSION for the java bean, it does not keep the
values that I set for variable in the bean persistent.Thanks,Sonny
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Need ideas for new PJC/Java Beans

Hello everybody,
I am always looking for new ideas about the Java Bean and PJC stuff. Sometimes I have good ideas about this, but sometimes it is quite a pain to find something new and innovative.
If you have ideas or needs about this, let me know in this thread.
(Sorry Oracle staff if I am going beyond my rights by using the Forum for that purpose)
Francois

Francois ,
I think that we all need to thank you for all your hard work promoting Oracle Forms.
Your input and constant support on this forum is greatly appreciated.
But I personally think that all this needs to be addressed by Oracle.
Your wrote
Sometimes I have good ideas about this, but sometimes it is quite a pain to find something new and innovative.
And I agree with you.
You can go as far as the Forms let you go...
Thanks,
Michael

Example for java bean

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