Concept of package in java???

as far i understood, packages create a namespace.
In the beginning of a java file i say...
package pack;then in some other java file I should be able to say...
import pack.*;am i wrong? by the way both t6he java files are in the same directory. what am i doing wrong. my second program where i import the pack.* does not compile.

To my understanding, the import statement specifies the class path you are going to refer, and the system will look up these packages in the classpath list you set in the system variable. Usually, the current directory is added to the list.
For example, there are two classes A and B, and A is packaged in pack. both A and B are located in the directory pack. When you import pack.A, the system will look for pack/A in the current directory, but there is no such directory pack.
Maybe one solution is to create a new directory pack under pack, and move A under pack/pack. It will look like this
pack/pack/A
pack/BA.java
package pack;
......B.java
import pack.A;
.......Another solution may include ".." in the classpath variable.
Maybe you can try!

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Problem with "package-info.java" using EJB 3.0 and OC4J

Hi all.
I already posted this question on JDeveloper forum, but didn't get any answer,
so I'll try posting here.
Anyway, I'm new both to JDeveloper and J2EE,
so I'm trying out examples for EJB 3.0, and I got stuck at "Use Security Annotations with EJB 3.0"
(http://www.oracle.com/technology/tech/java/oc4j/ejb3/howtos-ejb3/howtoejb30security/doc/how-to-ejb30-security-ejb.html).
Example code is working perfectly, if one builds it using Ant, but I'm importing all examples into JDeveloper (or at least I'm trying to :))
JDeveloper can't build file "package-info.java" containing following code:
@javax.annotation.security.SecurityRoles(roleNames={"superuser", "user"})
package oracle.ejb30;I'm getting following output in "Compiler - Log" window:
Error(2,1): 'class', 'interface', or 'enum' expected.
Help much appreciated...
platform used:
Windows XP SP2
JDeveloper Studio (Version 10.1.3, Build 3412)
JDK 1.5_06
OC4J 10.1.3 developer preview 4 (standalone version)

Since you're using EJBs, you can use JTA and can skip the getTransaction() calls. If you want to use getTransaction().begin() and commit(), then make sure that your EntityManager is resource-local. The configuration for this is in persistence.xml. Set a transaction-type of RESOURCE_LOCAL rather than JTA.

How to import DBMS_LOB package in java

hi
how we can use pl/sql's package in java
any body can help me
where i can found harachy of DBMS_LOB package
to include in my java or jsp program
thanx

perhaps this topic can help :
Calling PL/SQL from Java
and the use of DBMS_LOB package is here:
Supplied PL/SQL Packages and Types Reference Contents / Search / Index / PDF
http://download-east.oracle.com/docs/cd/B10501_01/appdev.920/a96612.pdf
Java Stored Procedures Developer's Guide Contents / Search / Index / PDF
http://otn.oracle.com/pls/db92/db92.docindex?remark=homepage
I hope that can help you. Perhaps another person can give the excat code.
Good luck!
Joel P�rez

XML without namespace and prefix, modified package-info.java, JAX-WS option

Hello
I have created a consumer business service which will be called from JDEdwards EOne, pulls data from database and send it to Fusion Middleware.
SO, I have created proxy using JAX-WS option. And suggested in oracle doc, I created proxy outside OMW and then copied it to my project. XML payload is getting generated without namespace and prefix. After some research, I modified package-info.java. Now, I am able to send the payload and if test it locally from Jdeveloper and take xml output using marshaller I can see it has namespace and prefix as well. BUt, when I run this from server it does not have namespace and prefix.
Please help.
Thanks
TK

Just to clerify,
The common complex types are StatusInfo, IdcProperty and IdcPropertyList. I ahve 3 more WSDL's with the exact same entires for those 3.

Packages in Java

Hi Guys,
I'm new in java world, and I have some questions, if anybody can help me plz.
1- The packages in java such java.sql and so on where we can downlad it?
2- How to add these packages to work with java?
Thanks

The following packages are already bundled with the jdk or jre you downloaded and installed:
java.applet
java.awt
java.awt.color
java.awt.datatransfer
java.awt.dnd
java.awt.event
java.awt.font
java.awt.geom
java.awt.im
java.awt.im.spi
java.awt.image
java.awt.image.renderable
java.awt.print
java.beans
java.beans.beancontext
java.io
java.lang
java.lang.annotation
java.lang.instrument
java.lang.management
java.lang.ref
java.lang.reflect
java.math
java.net
java.nio
java.nio.channels
java.nio.channels.spi
java.nio.charset
java.nio.charset.spi
java.rmi
java.rmi.activation
java.rmi.dgc
java.rmi.registry
java.rmi.server
java.security
java.security.acl
java.security.cert
java.security.interfaces
java.security.spec
java.sql
java.text
java.text.spi
java.util
java.util.concurrent
java.util.concurrent.atomic
java.util.concurrent.locks
java.util.jar
java.util.logging
java.util.prefs
java.util.regex
java.util.spi
java.util.zip
javax.accessibility
javax.activation
javax.activity
javax.annotation
javax.annotation.processing
javax.crypto
javax.crypto.interfaces
javax.crypto.spec
javax.imageio
javax.imageio.event
javax.imageio.metadata
javax.imageio.plugins.bmp
javax.imageio.plugins.jpeg
javax.imageio.spi
javax.imageio.stream
javax.jws
javax.jws.soap
javax.lang.model
javax.lang.model.element
javax.lang.model.type
javax.lang.model.util
javax.management
javax.management.loading
javax.management.modelmbean
javax.management.monitor
javax.management.openmbean
javax.management.relation
javax.management.remote
javax.management.remote.rmi
javax.management.timer
javax.naming
javax.naming.directory
javax.naming.event
javax.naming.ldap
javax.naming.spi
javax.net
javax.net.ssl
javax.print
javax.print.attribute
javax.print.attribute.standard
javax.print.event
javax.rmi
javax.rmi.CORBA
javax.rmi.ssl
javax.script
javax.security.auth
javax.security.auth.callback
javax.security.auth.kerberos
javax.security.auth.login
javax.security.auth.spi
javax.security.auth.x500
javax.security.cert
javax.security.sasl
javax.sound.midi
javax.sound.midi.spi
javax.sound.sampled
javax.sound.sampled.spi
javax.sql
javax.sql.rowset
javax.sql.rowset.serial
javax.sql.rowset.spi
javax.swing
javax.swing.border
javax.swing.colorchooser
javax.swing.event
javax.swing.filechooser
javax.swing.plaf
javax.swing.plaf.basic
javax.swing.plaf.metal
javax.swing.plaf.multi
javax.swing.plaf.synth
javax.swing.table
javax.swing.text
javax.swing.text.html
javax.swing.text.html.parser
javax.swing.text.rtf
javax.swing.tree
javax.swing.undo
javax.tools
javax.transaction
javax.transaction.xa
javax.xml
javax.xml.bind
javax.xml.bind.annotation
javax.xml.bind.annotation.adapters
javax.xml.bind.attachment
javax.xml.bind.helpers
javax.xml.bind.util
javax.xml.crypto
javax.xml.crypto.dom
javax.xml.crypto.dsig
javax.xml.crypto.dsig.dom
javax.xml.crypto.dsig.keyinfo
javax.xml.crypto.dsig.spec
javax.xml.datatype
javax.xml.namespace
javax.xml.parsers
javax.xml.soap
javax.xml.stream
javax.xml.stream.events
javax.xml.stream.util
javax.xml.transform
javax.xml.transform.dom
javax.xml.transform.sax
javax.xml.transform.stax
javax.xml.transform.stream
javax.xml.validation
javax.xml.ws
javax.xml.ws.handler
javax.xml.ws.handler.soap
javax.xml.ws.http
javax.xml.ws.soap
javax.xml.ws.spi
javax.xml.xpath
org.ietf.jgss
org.omg.CORBA
org.omg.CORBA_2_3
org.omg.CORBA_2_3.portable
org.omg.CORBA.DynAnyPackage
org.omg.CORBA.ORBPackage
org.omg.CORBA.portable
org.omg.CORBA.TypeCodePackage
org.omg.CosNaming
org.omg.CosNaming.NamingContextExtPackage
org.omg.CosNaming.NamingContextPackage
org.omg.Dynamic
org.omg.DynamicAny
org.omg.DynamicAny.DynAnyFactoryPackage
org.omg.DynamicAny.DynAnyPackage
org.omg.IOP
org.omg.IOP.CodecFactoryPackage
org.omg.IOP.CodecPackage
org.omg.Messaging
org.omg.PortableInterceptor
org.omg.PortableInterceptor.ORBInitInfoPackage
org.omg.PortableServer
org.omg.PortableServer.CurrentPackage
org.omg.PortableServer.POAManagerPackage
org.omg.PortableServer.POAPackage
org.omg.PortableServer.portable
org.omg.PortableServer.ServantLocatorPackage
org.omg.SendingContext
org.omg.stub.java.rmi
org.w3c.dom
org.w3c.dom.bootstrap
org.w3c.dom.events
org.w3c.dom.ls
org.xml.sax
org.xml.sax.ext
org.xml.sax.helpers
kind regards,
Jos

[svn:bz-trunk] 10059: update two package-info.java files, and add one new one.

Revision: 10059
Author:   [email protected]
Date:     2009-09-08 11:31:48 -0700 (Tue, 08 Sep 2009)
Log Message:
update two package-info.java files, and add one new one.
Modified Paths:
    blazeds/trunk/modules/proxy/src/flex/messaging/services/http/proxy/package-info.java
Added Paths:
    blazeds/trunk/modules/core/src/flex/messaging/util/concurrent/package-info.java
    blazeds/trunk/modules/core/src/flex/messaging/validators/package-info.java

Revision: 10059
Author:   [email protected]
Date:     2009-09-08 11:31:48 -0700 (Tue, 08 Sep 2009)
Log Message:
update two package-info.java files, and add one new one.
Modified Paths:
    blazeds/trunk/modules/proxy/src/flex/messaging/services/http/proxy/package-info.java
Added Paths:
    blazeds/trunk/modules/core/src/flex/messaging/util/concurrent/package-info.java
    blazeds/trunk/modules/core/src/flex/messaging/validators/package-info.java

Calling SQL packages from java

How do I call ORACLE sql packages from java?
We are still using Oracle 7.3. Any sample code
would be appreciated.

utility.processPLSQL( connRisk,
" Begin "
+ " hvar_sum.p_load_var_summary_data("
+ " '" + dfCall.format( priceDate ) + "', "
+ " '" + promptMonth + "',"
+ daysBack + ","
+ aliasType + ","
+ "'" + connRisk.owner + "'"
+ "); "
+ " end ; ",
"Load VaR Summary Data",
utility.noLogMsg ) ;
public boolean processPLSQL(
MyConnection conn,
String sql,
String dataType,
boolean createLogMessage ) {
double startTime = conn.log.getStartTime() ;
try {
CallableStatement cs = conn.theConnection.prepareCall(sql);
cs.execute() ;
cs.close() ;
conn.theConnection.commit();
if ( createLogMessage ) conn.log.logTiming( dataType, startTime ) ;
} catch ( SQLException e ) {
conn.log.logError( "Utility.processPLSQL; SQLException Error: " + e ) ;
System.out.println(new java.util.Date().toString() + "; User: " + conn.user
+ "; SQL: " + sql );
return false ;
return true ;
}

Prohibited package name: java.sql

hi,
i am trying to push a java application onto a JRun 3.1 server connecting to a oracle 8 database. in my servlet initialization, i use a connection pool to gain a connection to the database.
Class.forName("oracle.jdbc.OracleDriver");
outConn = DriverManager.getConnection(outUrl, outUsername, outPassword);
//throws error at the above line
this will throw an error:
java.lang.SecurityException: Prohibited package name: java.sql
this error is most peculiar because it runs fine locally on my developers version of JRun 3.1. but when i push it to a licensed version on a different server it gives this error. any hints?

I believe that class name for the Oracle JDBC driver is oracle.jdbc.driver.OracleDriver. The one you posted is incorrect.

Creating package-info.java in Netbeans

I'm a little frustrated that Netbeans won't even let you create a 'package-info.java' file because of its naming rules. Is there any way to get around this?

I don't know NetBeans very well, so don't know of any workaround for the naming.
You can just name the file "package.html" and it will do the same thing. The drawback is that it won't allow for package annotations -- it can still have javadoc tags, though.
http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/javadoc.html#packagecomment

Packages that java normally already imports

I am trying to get back into programming, and I remember awhile ago being told that java automatically imports certain packages, like java.lang, and maybe a couple more. I tried to test that out by using methods withing java.lang, or java.util, or java.io without importing those packages.
So I tried to test out java.util. I created an Arrays class without explicitly importing java.util. But my programming didn't recognize the class. I think it is possible that because of my directory structure the imports isn't working. But I'm not exactly sure how to make java see the packages in it's correct directory. Anybody can help? A more extensive question...what kind of environment does everybody use to code (windows environments please, that's what I'm using, I haven't set up a Linux box yet).

I am trying to get back into programming, and I
remember awhile ago being told that java automatically
imports certain packages, like java.lang, and maybe a
couple more. I tried to test that out by using
methods withing java.lang, or java.util, or java.io
without importing those packages.
So I tried to test out java.util. I created an Arrays
class without explicitly importing java.util. But my
programming didn't recognize the class. I think it is
possible that because of my directory structure the
imports isn't working. But I'm not exactly sure how
to make java see the packages in it's correct
directory. Anybody can help? A more extensive
question...what kind of environment does everybody use
to code (windows environments please, that's what I'm
using, I haven't set up a Linux box yet).Only the public classes in the package java.lang are automatically imported. Here is some more information about packages from Sun's java tutorial:
http://java.sun.com/docs/books/tutorial/java/interpack/packages.html

How many package in Java 1.1?

Do you know, How many package in Java 1.1?

Idiotic question, so here's an idiotic reply:
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   egrep -v '^(META-INF|com/sun|sun)' |\
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   sed -e 's;/;.;g' |\
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Registering package in java??

heloo guys!
How to register a package in java???
Your post is greatly appreciated....
-=samer=-

I mean i have download a jama package..there should be documentation available with instructions.
there should be a library that is a .jar file
your application needs to know where this .jar file is.
you tell it where it is by specifying the classpath.
you should know where this jar file is located
make sure it can be seen by specifying the classpath

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hi all,
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Thanks in advance
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i needed to decompile something and modified it, now i need to compile it backDo you have permission for that?
db

IOException: Prohibited package name: java.lang

Hi!
I have problems when trying to call a method that throws an exception over RMI-iiop. Instead of the exceptions that should be thrown I get an IOException and a stackTrace is printed out in the console(even if the exception is caught) The server is WL8.1 SP3 with java 1.4.2 and the client runs under java 1.3.1_09-b03.
It works when the client runs under java 1.4.2. I also wrote a small testapplication outside of WL and it works fine too(using RMI-iiop, tnameserv and suns ORB, server under java 1.4.2 and client under java 1.3.1_09-b03).
But when trying to call the method in WL i get the exception below instead of the one that is thrown.
java.io.IOException: Prohibited package name: java.lang
     at com.sun.corba.se.internal.io.IIOPInputStream.throwExceptionType(Native Method)
     at com.sun.corba.se.internal.io.IIOPInputStream.simpleReadObject(IIOPInputStream.java:272)
     at com.sun.corba.se.internal.io.ValueHandlerImpl.readValueInternal(ValueHandlerImpl.java:245)     at com.sun.corba.se.internal.io.ValueHandlerImpl.readValue(ValueHandlerImpl.java:207)
     at com.sun.corba.se.internal.iiop.CDRInputStream.read_value(CDRInputStream.java:1058)
I have also tried to use suns ORB in WL but still get the same problem. Everything works fine except when an exception is thrown by the remote method.
Any ideas what the problem could be?

Hi, thank you for the answer.
But I still think it can be a WL-problem. I can get an application outside of WL to work between java 1.4.2 and java 1.3.1. Even when sending a new exception created and compiled under 1.4.2 and sent to the 1.3.1-JVM, it is recieved correctly by the 1.3.1-JVM and thrown.
I also tried to change WL to use SUNs ORB which I use in my test but still get the same problem so it feels like the problem is with WL's JNDI..
/Jonas
Jonas Mohlin <[email protected]> writes:
Well the problem is because of the change in format
java.lang.Throwable in
J2SE 1.4. There are known bugs in the Sun 1.3.1 ORBs
that prevent this
working with a vanilla 1.3.1 client - and we can only
support a WLS IIOP
client running with 1.3.1 in this scenario (e.g. WLS
7.0).
andy
Hi!
I have problems when trying to call a method thatthrows an exception over RMI-iiop. Instead of the
exceptions that should be thrown I get an IOException
and a stackTrace is printed out in the console(even
if the exception is caught) The server is WL8.1 SP3
with java 1.4.2 and the client runs under java
1.3.1_09-b03.
It works when the client runs under java 1.4.2. Ialso wrote a small testapplication outside of WL and
it works fine too(using RMI-iiop, tnameserv and suns
ORB, server under java 1.4.2 and client under java
1.3.1_09-b03).
But when trying to call the method in WL i get theexception below instead of the one that is thrown.
java.io.IOException: Prohibited package name:java.lang
     atcom.sun.corba.se.internal.io.IIOPInputStream.throwExce
ptionType(Native Method)
     atcom.sun.corba.se.internal.io.IIOPInputStream.simpleRea
dObject(IIOPInputStream.java:272)
     atcom.sun.corba.se.internal.io.ValueHandlerImpl.readValu
eInternal(ValueHandlerImpl.java:245)     at
com.sun.corba.se.internal.io.ValueHandlerImpl.readValu
e(ValueHandlerImpl.java:207)
     atcom.sun.corba.se.internal.iiop.CDRInputStream.read_val
ue(CDRInputStream.java:1058)
I have also tried to use suns ORB in WL but stillget the same problem. Everything works fine except
when an exception is thrown by the remote method.
Any ideas what the problem could be?--

Packaging a Java Application?

Is there a quick and easy way to package a java program up into something (like an EXE file) and run, like a C program? Or does any user have to first compile and then run in the java Compiler?

Compile your code, ending up with a bunch of classes. Put them in a jar file with "Main-class:" defined (I believe; check the docs first).
Then any user who has set up their system to use javaw to execute jars, can just double-click on your jar to run it.
BTW, you don't run code in the compiler. You compile with the compiler. You run with a JVM.

Concept of package in java???

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