Regarding .java file

Hi,
I deployed a project with all tha class files
with a single web.xml file. Afterwards what is the
use of the .java file which I used to create the
class file? (This was asked by a interviewer in an
interview.) Please help me with the answer.
ThanksWhat did you answer?
To tell you the truth, you can throw that java file out of the window. Who cares, if you find a bug, just write the whole program again.
Does that sound good?

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Best practises regarding generation of the EOImpl and VORowImpl java files

Greetings,
I was wondering what is the best practice/suggested approach regarding generation of the EOImpl and the VORowImpl java files for ADF Business Components.
From the maintenance point of view, it makes sense to generate them only if you want to put some custom code in those e.g. validation or transient attribute.
However from performance point of view, does it help to have these EOImpl and the VORowImpl java files generated.
Any thoughts on this will be a lot helpful.
regards - rutwik

Hi
Sections:
* 5.11.3.3 Attribute Indexes and InvokeAccessor Generated Code
* 6.9.4.4 Attribute Indexes and InvokeAccessor Generated Code
Explain the details of the generated code for view object row classes and entity object row classes, respectively.
As described in the guide, the key benefit of the generated code is not performance, but of type-safe access and having a place to put custom code when needed.
When you don't have a generated row class, then there is no typesafe method like getSal() to get the Sal attribute.
Section 4.4.9 Generic Versus Strongly-Typed APIs gives a few more details on that and both 5.11.1.1 Generating Bind Variable Accessors and 5.11.1.2 Generating View Row Attribute Accessors give some concrete examples of the value proposition of the strongly-typed API's.
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or
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Since it's rare that someone will like to use the numerical approach, then let's assume that people would go with the generic getAttribute("SomeAttrName") way.
Internally, the framework will need to find the attribute index based on the attribute name before accessing the attribute. If you perform this attribute-name-to-attribute-index lookup a zillion times, then of course it would end up representing some overhead that you could avoid by either using the numerical index yourself, or generating the strongly-typed class. The generated code avoids the need to lookup the attribute by string name and also provides the compile-time checking (i.e. typesafe access) in your code.
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Hope this helps
rgds
susan

How to get the value from a JavaScript and send the same to Java file?

Hi.
How to get the value from a JavaScript (this JS is called when an action invoked) and send the value from the JS to a Java file?
Thanks and regards,
Leslie V

Yes, I am trying with web application.
In the below code, a variable 'message' carries the needed info. I would like to send this 'message' variable with the 'request'.
How to send this 'message' with and to the 'request'?
Thanks for the help :-)
The actual JS code is:
function productdeselection()
var i=0;
var j=0;
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mei=document.forms[0].MEI;
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++i;
if(null != mei )
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if(null != lpi)
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if(null != mei && mei.checked)
deselectedproduct[++j]="GAP?";
if(null != lpi && lpi.checked)
deselectedproduct[++j]="LPI?";
if( 0!=j)
if(i!=j)
for (x=0; x<deselectedproduct.length; x++)
if(null != deselectedproduct[x])
message =message+ "-" +deselectedproduct[x];
alert(message);
else
//alert(" You cannot remove all products!");
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How to create a .java file with multiple classes

I have all the below classes declared in a file say ABC.java under
a common package called somepackage
Abstract class A
Void abstract metod1();
Void metod2();
Class B
void method3();
Void method4();
Class C
void method1();
Void method2();
In Client.Java
On compiling the Client.Java I get errors
Import somepackag.*;
Class Samp extents A
void Method1()
Public class Client
A a1 =new Samp(); //error undeclared class A
B b1 = new B1();//error undeclared class B
C c1 = new C1();//error undeclared class C
is it possible to have all the class declared in one file ( i dont need mutiple classes, as this file will be autogenerated , i need all classes in one file) and use the classes inside this in the some client app
regards
MP

Peetzore wrote:
As long as you have only one public class and your .java file is named after it you shouldn't have any problem.I did exactly that, but still i get the same error "Cannot find symbol"
i have used the import command on top as import somepackage.*;
Edited by: mpjava on Jun 2, 2009 1:29 AM
Edited by: mpjava on Jun 2, 2009 1:30 AM

Why do I need to restart Apache and Tomcat every time a java file is change

If a java file is changed and complied the changes are not reflected if Tomcat is not restarted.
The settings in server.xml are as:

<Context path="/manager" docBase="manager" debug="0" privileged="true"/>
<Context path="/cf" docBase="cf" debug="0" reloadable="false"/>
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Also tried out with Manager Application of tomcat-users.xml with reloadable="false" as well as reloadable="true",
But when I reload the application using the command
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Also when reloaded through Manager Servlet, Only my load-on-startup servlet is reloaded, but other java classes are not.
Is it neccessary to execute this reload command from the server itself. I m executing it from a remote m/c. and have mapped the application with a domain name virtually.
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Regards,
Rupali

or you can "touch" your web.xml file.
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Hi,
Im sunil,new to this weblogic workshop8.1..i dont know how to execute standalone .java files or servlets in workshop.plz help me and tell the way.
regards
Budati sunil

Im not too sure about the Java project. But single normal java files with public static void maain(String [] args) are very simple to execute.
1. Write the java code somewhere lets call this class A.
2. Make a dummy page flow.
3. In the begin action of this pageFlow, call the main method of the A class directly using A.main(null) since main is a static method. your code will work fine.
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Hope it helps
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Hi All,
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Or is there any other way?
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Hello,
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Sumit Kumar Agarwal

So how does it take this file
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Error in Running of java file(while connecting for SAP BW SERVER)

Hi,
Any one could be help regarding the following error message I am getting on running of Java File?
C:\>cd C:\j2sdk1.4.2_04\bin
C:\j2sdk1.4.2_04\bin>Set Classpath=%classpath%;C:\j2sdk1.4.2_04\bin\jco\com\sap\
mw\jco\jco.jar;
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200
JCO.init: Unsupported Java VM version 1.4.2_04 detected.
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Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
Java HotSpot(TM) Client VM (build 1.4.2_04-b05, mixed mode)
C:\j2sdk1.4.2_04\bin>

Hi Ganesh,
Thanks for reply.I tried the classpath you mentioned,Still I am getting the same error.
C:\>cd C:\j2sdk1.4.2_04\bin
C:\j2sdk1.4.2_04\bin>Set Classpath=%Classpath%;.;C:\j2sdk1.4.2_04\bin\jco\com\sa
p\mw\jco\jco.jar;
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C:\j2sdk1.4.2_04\bin>java DevelopmentQueue
200
JCO.init: Unsupported Java VM version 1.4.2_04 detected.
C:\j2sdk1.4.2_04\bin>
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I appreciate your early mail.
Kind regards
CSM REDDY

How to use standard Java file in custom module

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A tool for editing javadoc in .java files

Hi
i am looking for a tool that can be use for editing the javadoc in the .java files. it should edit constructors, methods and fields.
if you know such tool please send me a link.
Regards
y.l.

We list some standalone solutions on the Javadoc FAQ.
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http://java.sun.com/j2se/javadoc/faq/index.html#G
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Best Regards.
Metan

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How to create a .java file through a j2me program?

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Regarding .java file

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