Finding java classes

How to find the classes and sub packages in a given java package?

hi friend,
i need a java program or by using
any alternate command.I'm not going to give you a program, but you can build one yourself by following this online tutorial:
http://java.sun.com/docs/books/tutorial/reflect/index.html

Similar Messages

Where to find Java Class File Specification for Java 5.0?

Where to find Java Class File Specification for Java 5.0?
thank you in advance.

same place you found it for 1.4Can u give more details? I thought the class spec for Java 1.4 is the same as Java 1.2.
anyone can tell where to find Java Class File Specification for Java 5.0?
Thanks.

Can't find Java Class of a standard UI Command

Hello everybody,
Where can i find Java classe source and Bundle file of a standard UI Command "AppDetails"
for example ?
Thanks & Regards,
Hassan Mounim

Hi Hassan,
You can find the UIDetailsCommand class here:
..\WEB_INF\portal\portalapps\com.sap.km.cm.ui.flex\private\lib\km.appl.ui.flex.uicommand_core.jar
And the bundle file UIConst here:
..\WEB_INF\portal\portalapps\com.sap.km.cm.ui.flex\lib\km.shared.ui.flex.uicommand_api.jar
Hope this helps,
Robert

Cannot find java classes in PDK

we cannot find the java.classes
oracle.webdb.portlet.Portlet;
oracle.webdb.portlet.PortletInfo;
oracle.webdb.portlet.PortletUtils;
we need them for developing portlets.
Thomas
null

The definitive article: [Mastering the Java Classpath|http://www.kevinboone.com/classpath.html].
... and actually do the exercise therein.
See you an hour or so if you're still stuck (which you won't be).
Cheers. Keith.

Can't find Java Class

I create Java Class from JDeveloper(version 9.0.4) and I open Oracle Form(Oracle Form Developer version 9.0.4) I set class path and builder class path complete but I can't import JAVA Class into Form.
(Calling a web service from oracle appkication server 10g forms services)

Hello,
put the complete path/filename of your class in the FORMS90_BUILDER_CLASSPATH registry key.
Francois

Problem in finding java class file

I am writting an application using servlets , JSP and a simple java classfile. The simple java class file is for connection pool and the name of connection pool class is DBConnectionManager . I am using JavaWebserver2.0 and I have placed this class file in .\JavaWebserver2.0\classes
I am placing my servlets in .\JavaWebserver2.0\servlets folder. Since I am using wfm package so my servlets are placed in .\JavaWebserver2.0\servlets\wfm .
The problem is with compiling the servlet placed in wfm folder . I get the following error:-
TestServlet.java:11:cannot resolve symbol
symbol: class DBConnectionManager
location: class wfm.TestServlet
However when I try to compile this class in servlets folder and remove the package statement from the source file, it compiles and works very fine. I am having lot of confusion as the class DBConnectionManager is in classpath but even then compiler gives error. The same class when placed in servlets folder and package statement is removed works very fine.
Kindly help.

Hi,
Is the DBConnectionManager class declared public?
Does the TestServlet import the package that contains the DBConnectionManager?
This is all I can come up with, with the current information.
Cheers,
--Arnout

Where find java classes corresponding to message mapping and interfaces ?

Hi
Forum,
when i create my objects in Repository, like Message interface and messgae mapping, correspoding to them, java class in created, where can i see these java classes in the XI's file system,

Hi sudeep,
During the installation of Xi we select a database.So all the objetcs and related things that we create in IR and ID will be saved in the database only.I dont know how to check the .class file for each object...
Check these weblogs from sravya where she has given you the table names where the IR and ID objects are stored:
/people/sravya.talanki2/blog/2007/01/11/ripping-off-sap-xi-stack-133sharing-the-goodies-of-abap-api146s
/people/sravya.talanki2/blog/2005/12/02/sxicache--ripped-off
/people/sravya.talanki2/blog/2006/12/28/skelton-of-mapping-runtime-in-sap-xi
regards
BILL

FindClass not able to find java class

when i try to call the java code from C program it works fine.
when i call the same java code from dll . it does not see the java class.
when String class called from dll it works fine.
can you pls tell me if i am missing anything.
thanks in advance
result = JNI_CreateJavaVM(&jvm,(void **)&env, &vm_args);
printf("JVM created\n");
if(result == JNI_ERR ) {
printf("Error invoking the JVM");
exit (-1);
// cls = (*env)->FindClass(env, "SecurityPOC");
cls = (env) -> FindClass("SecurityPOC");
// cls = (env) -> FindClass("java/lang/String");

Hallo,
I do not quite understand your problem as you have not given enough details. Is your problem that you cannot call the JNI_CreateJavaVM() from your DLL? If you are using Java 1.4 then that will not work, see Bug Nr. 4920112. (http://developer.java.sun.com/developer/bugParade/bugs/4920112.html)
If you are using V1.3, then it should work but you need to set up the JVM options before you call JNI_CreateJavaVM(), regardless of whether you create the JVM in your program or in a dll. For example:
char classpath[2000];
char * USER_CLASSPATH = "<myclasspath>";
JavaVMInitArgs vm_argsNew;
vm_argsNew.version = JNI_VERSION_1_2;
// JIT Compiler off
JavaVMOption options[3];
options[0].optionString = "-verbose:gc";
sprintf (classpath, "-Djava.class.path=%s", USER_CLASSPATH);
options[1].optionString = classpath;
options[2].optionString = "-Djava.compiler=NONE";
vm_argsNew.options = options;
vm_argsNew.nOptions = 3;
vm_argsNew.ignoreUnrecognized = JNI_TRUE;
/* Create the Java VM */
void ** ppEnvVoid = reinterpret_cast <void **> (&a_pJNIenv);
jint rc = JNI_CreateJavaVM(&a_pjvm, ppEnvVoid, &vm_argsNew);
if (rc < 0)
good luck
David Singleton
[email protected]

Find Java Classes

As we know that during run time JVM will load all the class files that we have set in the CLASSPATH. For instance:
My CLASSPATH was ".:c:\javaprogram;c:\javaprogram2\sub1;c:\javaprogram3
and I have a class called myclass.class which store in c:\javaprogram
and I call the class by typing the command : java myclass.class
the JVM will try to find the myclass.class from the current directory as well as these three directories c:\javaprogram;c:\javaprogram2\sub1;c:\javaprogram3, so my concern is will it be an exception if I have myclass.class in these three directories????

As we know that during run time JVM will load allthe class files that we have set in the CLASSPATH.
Is that really true? My understanding was that the
CLASSPATH was a list of places to look when the JVM
is looking for a particular class. So if the dirs
listed contain classes that are not actually
referenced, these would not be loaded.
Anyone have a definitive answer?You are correct. Classes aren't loaded until needed. The JVM definitely does not load every class that it finds on the CLASSPATH.

Learning Java Classes etc.

I'm fairly new to Java. I have had three seperate programming classes on development, but always get deployed as a project manager, so don't get much chance to practice coding, except on my own.
I have three sets of java modules, classes and objects on my computer:
1.) Sun Java - Default for Browser support
2.) Visual Cafe
3.) Visual Age for Java (IBM)
What I don't have, because of lack of opportunity, is command of the class modules, objects, etc. I have learned, as project manager, that what seperates the good programmers from the novice is his/her command of classes, modules, beans, objects, etc.
On my own computer, I have been frustrated by having three duplicate sets, which took up over 400MB of hard drive. I therefore am trying to get them all into one directory. I spent a week about a month ago moving all the files and changing the pointers in Windows with REGEDIT. I'm still not sure I was truly successful. If any of you have experience in configuring any of these your advice is coveted.
What I would like is for other programmers to join me in a self help project, using MySQL and a web interface, to database all the class modules, beans, objects, etc. into a database complete with programming functional description and listed parameter interfaces.
This would let me see, learn, and be able to use these code snipets, at a quick view.
It could also be a resource for other programmers to go to to get new objects etc. I feel this would propel the use of JAVA forward like no other resource.
I know as a project manager, I would like such a source to point the developers to, when they are having coding problems. I feel that this would keep the wheel from being re-invented over and over and would help all in the industry with project budgets.
If this excites you email me at:
[email protected]
Thanks!
Nyle Davis

I don't want to sound stupid in this reply, but I see nothing that I can say that will not sound stupid unless we go back to the two (2) basic rules of programming/CS we were taught in our first CS class 101, (sorry if your prof did you the injustice of not hammering these home to you) which are:
1. Never Never Never Never Never Never Never Never Never Never Never Never Assume anything
2. Never Never Never Never Never Never Never Never Never Never Never Never be Ambiguous
Having stated those I find all the API and DOC information in violation of both of these rules, basically they say nothing to me because they 1.) assume you already now what they are talking about and have previous knowledge on each subject at hand, that is you are a pro already, such as yourself and 2.) Do not thuroughly explain what they do, how they interact, what their purpose and intent are, what function they perform, how they interact with others etc. I find most have multiple interfaces but absolutely no documentation on the interfaces, which is the most important part.
That is why I want to launch my project. Skilled persons working with the Java project everyday, with proper mentoring, and being surrounded by other pros with the right mental positioning and mindframe Java is a slam dunk, but for the person, totally on their own, though the language itself is rather self explainitory (at some levels), they face re-inventing all the class modules and/or building all kinds of modules, unless there is a totally self explaintary databased and indexed source with better documentation than currently exists.
Though I feel you take personal offense at this, it will not hurt JAVA but only help it. To make JAVA the preferred language, this kind of simplicity needs to be there. The easier anything is the more people use it, thus the more prolific it becomes. I personally find JAVA class modules confusing and totally ambiguous, at least from the DOC descriptions.
Most OO developers trash on Big Blue but one thing IBM did well, that no one since has done as good is their programming and help manuals. I have not seen any of the "Johnny come Lately" companies, MicroSoft and Sun included, even come close in simplicity of and thuroughness of documentation of any programming commands, languages, etc.
I would want to return to this level of thuroughness in the database proposed. I would not post any submittals that did not completely pass the documentation and simplicity of use tests. Rather I would return email to the submitter asking for thurough documentation. I can even invision building a documentation template to make sure the documentation is complete enough.
To me documentation is not complete if, the first time I try to use something whether program command or class module, it does not do exactly as advertised, without tweaking, and with no rework.
Unfortunenately my experience with JAVA has been anything but that. Everything I try to do has to be reworked and/or tweaked more than once to make it work. Not good. And when I do finally get it to work and/or understand some of the basic functionality, I still find myself tweaking it again and again in different deployments.
To me a program command and/or class module should work the same always, regardless of the deployment. Therefore if environment, application, and/or deployment changes the action/interaction of the command/class module and this was not documented then the documentation is not complete.
Big Blue understood that not all commands would work the same on all platforms, so they published "Application" manuals for the various platforms that explained the variances. That kind of information is still missing from JAVA.
Since the DOC is associated with the class module itself, and if the module was say tested originally only on MS Windows, but not tested on Linux, then the DOC file is good only for Windows. Currently there is no way to upgrade that for other platforms, unless Sun or the originator decides to be generous, which hardly ever happens.
If the database I'm proposing get built, and you find a class module, built for Windows and apply it to Linux, you will tweak it to get it to work correctly with the new platform. With the database the module would be advertised as "for Windows only", but once you apply it to Linux, you could then log to the database, upload the Linux version, explain the reason for the changes and when/where in Linux it work and how, basically suplementing the documentation and code and then all other programmers would benefit from your share work.
That is what I invision for the database, a shared resource.
Maybe I'm being to verbose here, but I have a lot of frustration with this. My favorite language is REXX. I can program REXX on any platform, any application and at any level from Gen2 to OO. REXX after reading the programming manuals, is self explaintary.
REXX along with JAVA and C/C++ in in the PL1 programming family, using same or similar syntax. Therefore JAVA should be easy for me, right? But this is not the case, though the language is fairly easy and somewhat explaintary, I have searched the web, multiple multiple times to find a complete command reference that explains each and every JAVA command, with full documentation. I still have not found such a resource. I have compiled a group of resources (over 12) to help me with this task and still so many of the commands are explained so vaughly that using just the programming language alone, by itself, without any class modules, is not an easy proposition.
Then jump into class modules to try to keep from re-inventing the wheel and the confusion get even greater.
Now do you understand?

How to find the location of java class files at runtime?

Does anyonw have an idea how to get the file name of a java class given the binary name?
I mean how can I get the file name for my class myPackage.myClass?
I am looking for a function which takes "myPackage.myClass" as input and returns
"c:\\javaprojects\\myPackage\\myClass.class".
I tried to do it with the LassLoader class but it did not work. Does anyone have an idea if the Java core API already has a function which does that?
Thanks, Bernhard

Hi ,
It is a simple SAMPLE code , you think and build a logics to handle all classes.
Try this sample, It doesn't handle the inner classes you put logic to handle the logics for inner classes.
The inner class format is it contains the character $ in the File location but inside the code you put "." instedad of "$" you to find out or put trials.
package pkg1;
import java.io.* ;
import java.util.* ;
import java.util.zip.* ;
public class ClsB {
     private static Vector clsPaths ;
     public static Vector getPaths() {
          if( clsPaths == null ) {
               String paths = System.getProperty( "java.class.path" ) ;
               // In linux or solarise use the following
               // StringTokenizer st = new StringTokenizer( paths , ":\n" ) ;
               StringTokenizer st = new StringTokenizer( paths , ";\n" ) ;
               clsPaths = new Vector() ;
               while( st.hasMoreTokens() ) {
                    String path = st.nextToken() ;
                    File f = new File( path ) ;
                    if( f.exists() ) {
                         try {
                              f = f.getCanonicalFile() ;
                              clsPaths.add( f ) ;
                         }catch( IOException ioe ) { }
          return clsPaths ;
     public static String findClassPath( String fullClassName ) {
          Vector v = getPaths() ;
          for( int i = 0 ; i < v.size() ; i++ ) {
               File f = ( File ) v.get( i ) ;
               String path = findIn( f , fullClassName ) ;
               if( path != null )
                    return path ;
          return null ;
     static boolean isJar( File jar ) {
          if( jar.isDirectory() )
               return false ;
          try {
               ZipFile zf = new ZipFile( jar ) ;
               return true ;
          } catch ( ZipException ze ) {
               // It is not a jar file
               // you handle this
          } catch ( IOException ioe ) {
               ioe.printStackTrace() ;
          return false ;
     static String findIn( File dirOrJar , String clsName ) {
          if( isJar( dirOrJar ) ) {
               // It is something different because the class inside the jar file
               // Simply I return the jar file location and the entry name ,
               // but you put action what you want
               if( isInsideJar( dirOrJar , clsName ) ) {
                    // All archieve file using the path separator is '/'
                    return dirOrJar.getPath() + "!" + clsName.replace( '.' , '/' ) + ".class" ;
          } else {
               File f = new File( dirOrJar , clsName.replace( '.' , File.separatorChar ) + ".class" ) ;
               if( f.exists() ) {
                    return f.getPath() ;
          return null ;
     static boolean isInsideJar( File jar , String clsName ) {
          try {
               ZipFile zf = new ZipFile( jar ) ;
               // All archieve file using the path separator is '/'
               ZipEntry ze = zf.getEntry( clsName.replace( '.' , '/' ) + ".class" );
               return ( ze != null ) ;
          } catch ( ZipException ze ) {
               ze.printStackTrace() ;
          } catch ( IOException ioe ) {
               ioe.printStackTrace() ;
          return false ;
     public static void main(String[] args) {
          System.out.println( findClassPath( "pkg1.ClsB" ) );
          System.out.println( findClassPath( "pkg1.pkg2.ClsA" ) );
}

Java server page compiler can not find a class defined in a java bean file

I have a jsp file using java bean. The java bean class file is uploaded into the server and also the directory to this java bean .class file is included in the Unix environment CLASSPATH. This .jsp file is registered and should be compiled and excecuted automatically.
WHen I try to invoke this .jsp file, the jsp compiler error, saying the class defined by java bean can not be found. I already include this path in teh CLASSPATH, I thought the jsp compiler will go to the right place according to CLASSPATH to find the referenced class.
Can anyone tell me what I have done wrong or what should I do in order to allow jsp compiler to find the class refrenced by .jsp file and defined by java bean file?
Thank you so much

hello friends,
i am also facing the same problem of not finding bean class files for both jsp and servlet though it is placed in same package. the problem of not finding bean class file for jsp is experienced in Tomcat server only whereas in Blazix, there is no such error and the file is compiled and runs successfully.
i have checked Tomcat properly. there is no error in its configuration also servlets without the use of bean files run successfully. so please can anybody guide me about what is the problem and how to solve it. plz its urgent .

Where I can find the java class about xml

I need transfer a xml file to oracle use Java. I find a Java program can do it, but the java progran need a class(oracle.xml.sql.dml.*) and I don't find it.
I use Kawa 4.01a and Java 1.3.
I need people tell me where I can find the class.
Thanks
Chih-Ping Yang

Go to: http://technet.oracle.com/tech/xml/oracle_xsu/
Select [Software] from the tab on the top
and download OracleXML SQL Utility.
If you're using Oracle8.1.5, download version
111. If using Oracle8.1.6, download XSU12.
Unzip the archive file.
Under the lib directory, there should be
a jar file. This jar file contains the class
you're looking for.
You do not need to unzip this file. Just set
it in your CLASSPATH.

CDR-17066 RON cannot find java EWT graphics classes

Hello,
I am evaluating Oracle SCM. Everything's going great, except I am unable to use the Version History or Version Events. When I try, I get an error:
"CDR-17066: RON cannot find java EWT graphics classes"
The action it recommends is to check the registry or environment variable JVM_CLASSPATH_RON, and make sure it points to the ewt jar.
I found a jar called ewt3.jar in my oracle/jlib directory. There was no environmental variable called JVM_CLASSPATH_RON, so I created one and set it to that jar. But I'm still getting the same error.
Any help would be appreciated. Thank you.

Hi,
this error message is rather strange: I checked in our knwoledge base, but you seem to be the first one having this issue!
I had a look to my registry and indeed I couldn't find the variable JVM_CLASSPATH_RON.
I suspect that this variable was superseded by another one (JVM_CLASSPATH_DEFAULT_THIN_JDBC ?).
I checked for all variables including ewt and found the following:
. FORMS90_CLASSPATH (<Home>\jlib\ewt3.jar)
. FORMS90_BUILDER_CLASSPATH (<Home>\jlib\ewt3.jar)
. JVM_CLASSPATH_DEFAULT_THIN_JDBC (<Home>\jlib\ewt4.jar)
FORMS90_... variables are not used by the Version History and Version Event Viewers, but JVM_CLASSPATH_DEFAULT_THIN_JDBC is.
I removed the entry <Home>\jlib\ewt4.jar from JVM_CLASSPATH_DEFAULT_THIN_JDBC, and then I could reproduce your issue.
So could you check the content of this variable JVM_CLASSPATH_DEFAULT_THIN_JDBC?
It's located in HKEY_LOCAL_MACHINE\SOFTWARE\Oracle\HOMEx\REPADM61\DEFAULT_JVM_PARAMS_THIN_JDBC
Could you also check that file <Home>\jlib\ewt4.jar does exist on your machine?
Regards,
Didier.

Find User from java class

Hi experts,
What is the method called in find Users Form ?
I would like to call it in a java class.
From a java class, I would like to look for an IDM user in the lighthouse with a login name as a search criteria, how can I do this ?
Thanks a lot

From a java class, I would like to look for an IDM user in the lighthouse with a login name as a search criteria, how can I do this ?Method 1 if you don't call it from your webapps, and suppose you create a class to query you repository.
Method 2 supposed you call your class from the webapps.
Method 1(bad and ugly method, but no need to read specification): look in your repository, lighouse user are stored here.
Look, for example, in the account table.
Method 2: Read the waveset javadoc, at WSUser.
(IDPACK_2005Q3M3/REF/javadoc/com/waveset/object/WSUser.html)
WSUser(java.lang.String name, java.lang.String noop)try this :
WSUser user = new WSUser("youraccountname", null);

Finding java classes

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