Free Java Packages

Hi,
This post might be a bit off topic, but I'll be glad if someone could help.
I am currently creating a GUI project using Swing. I wanted to know if I could get a list of some free Java packages that I could include in my project.
Eg. A voice recognition package that I can build my GUI around, etc.
A link to such a website with the packages would be very helpful.
Thanks

If you want voice recognition, I suggest you wait
about 5 years. Unless your users have to use this
system for some reason, they are more likely to find
a keyboard easier and less error prone.I used voice recognition about 10 years ago and if was possible to train it to recognice commands from a person. I used it to enable computers for people who coldn't operate normal input devices. Voice recognition is also use today by doctors to control operating equipment and by fighter pilots in situations you need both hands free.

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How do we create self-signed certificate using java packages

Hi All,
I require some information on creating self-signed certificate using java packages.
The java.security.cert.* package allows you to read Certificates from an existing store or a file etc. but there is no way to generate one afresh. See CertificateFactory and Certificate classes. Even after loading a certificate you cannot regenerate some of its fields to embed the new public key – and hence regenerate the fingerprints etc. – and mention a new DN. Essentially, I see no way from java to self-sign a certificate that embeds a public key that I have already generated.
I want to do the equivalent of ‘keytool –selfcert’ from java code. Please note that I am not trying to do this by using the keytool command line option – it is always a bad choice to execute external process from the java code – but if no other ways are found then I have to fall back on it.
Regards,
Chandra

I require some information on creating self-signed certificate using java packages. Its not possible because JCE/JCA doesn't have implementation of X509Certificate. For that you have to use any other JCE Provider e.g. BouncyCastle, IAIK, Assembla and etc.
I'm giving you sample code for producing self-signed certificate using IAIK JCE. Note that IAIK JCE is not free. But you can use BouncyCastle its open source and free.
**Generating and Initialising the Public and Private Keys*/
public KeyPair generateKeys() throws Exception
      //1 - Key Pair Generated [Public and Private Key]
      m_objkeypairgen = KeyPairGenerator.getInstance("RSA");
      m_objkeypair = m_objkeypairgen.generateKeyPair();
      System.out.println("Key Pair Generated....");
      //Returns Both Keys [Public and Private]*/
      return m_objkeypair;
/**Generating and Initialising the Self Signed Certificate*/
public X509Certificate generateSSCert() throws Exception
    //Creates Instance of X509 Certificate
    m_objX509 = new X509Certificate();
    //Creatting Calender Instance
    GregorianCalendar obj_date = new GregorianCalendar();
    Name obj_issuer = new Name();
    obj_issuer.addRDN(ObjectID.country, "CountryName");
    obj_issuer.addRDN(ObjectID.organization ,"CompanyName");
    obj_issuer.addRDN(ObjectID.organizationalUnit ,"Deptt");
    obj_issuer.addRDN(ObjectID.commonName ,"Valid CA Name");
    //Self Signed Certificate
    m_objX509.setIssuerDN(obj_issuer); // Sets Issuer Info:
    m_objX509.setSubjectDN(obj_issuer); // Sets Subjects Info:
    m_objX509.setSerialNumber(BigInteger.valueOf(0x1234L));
    m_objX509.setPublicKey(m_objkeypair.getPublic());// Sets Public Key
    m_objX509.setValidNotBefore(obj_date.getTime()); //Sets Starting Date
    obj_date.add(Calendar.MONTH, 6); //Extending the Date [Cert Validation Period (6-Months)]
    m_objX509.setValidNotAfter(obj_date.getTime()); //Sets Ending Date [Expiration Date]
    //Signing Certificate With SHA-1 and RSA
    m_objX509.sign(AlgorithmID.sha1WithRSAEncryption, m_objkeypair.getPrivate()); // JCE doesn't have that specific implementation so that why we need any //other provider e.g. BouncyCastle, IAIK and etc.
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    System.out.println(m_objX509.toString());
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//****************************************************************

The java package netscape.ldap

hi :-)
can someonne tell me, how to get the java package netscape.ldap for free in the web or somewhere else.
i need to bind it in my java programm.
please help me:-(
best regards
P.S.: you can also mail me the package, if you have the chance
mail: [email protected]

thankx for the help..
but i already visited this site.....and found nothing...

Import Java package in JSP

I hope this is an appropriate forum for this query.
I want to be able to access a user-created Java package in JSP.
I have this code:
<%@page import="TPClass.*" %>
<%
xxx = TPClass
session.setAttribute("response",xxx.GetTPResponse());
%>
The error display points to TPClass in the import statement with the message "TPClass not found".
TPClass files are in the same location as the other project files.
I have creatyed and compiled the TPClass package.
Is there more I need to do?
Brenton

I think you are very new to java....
anyway
<%@page import="class name with full qualified package name"%>
like
<%@page import="com.x1.x2.TPClass"%>
<%
TPClass cls =new TPClass();
//then do whatever you want...
%>
hope u understand now.....

JAVA PACKAGES and JSP

i Have two problems one is i am designing a website which consists of a form. I am trying to write the Connectiviy and all other insert statements in seperate java packages and include them in JSP files.
i Have two java packages one is DBUtil(having two java files both dealing with connectovity) and another one is StudentUtIl which has java files that open the connections with database connection and insert data into DB., I am having a big Problem here. How can i call the function in the other java package in the files in this java package. i have openDB()and Close() in the other Db and i want to call these functions in JAVA classes in the other package. How to include a package. Both these packages are in the same File system mounted on a Local directory

Thank you for the reply. I am giving the code i have given the full class name . and now it is giving the following error :
Cannot reference a non-static method connectDB() in a static context.
I am also giving the code. Please do help me on this. i am a beginner in java.
import java.sql.*;
import java.util.*;
import DButil.*;
public class StudentManager {
/** Creates a new instance of StudentManager */
public StudentManager() {
Connection conn = null;
Statement cs = null;
public Vector getStudent(){
try{
dbutil.connectDB();
String Query = "Select St_Record, St_L_Name, St_F_Name, St_Major, St_Email_Address, St_SSN, Date, St_Company, St_Designation";
cs = conn.createStatement();
java.sql.ResultSet rs = cs.executeQuery(Query);
Vector Studentvector = new Vector();
while(rs.next()){
Studentinfo Student = new Studentinfo();
Student.setSt_Record(rs.getInt("St_Record"));
Student.setSt_L_Name(rs.getString("St_L_Name"));
Student.setSt_F_Name(rs.getString("St_F_Name"));
Student.setSt_Major(rs.getString("St_Major"));
Student.setSt_Email_Address(rs.getString("St_Email_Address"));
Student.setSt_Company(rs.getString("St_Company"));
Student.setSt_Designation(rs.getString("St_Designation"));
Student.setDate(rs.getInt("Date"));
Studentvector.add(Student);
if( cs != null)
cs.close();
if( conn != null && !conn.isClosed())
conn.close();
return Studentvector;
}catch(Exception ignore){
return null;
}finally {
dbutil.closeDB();
import java.sql.*;
import java.util.*;
public class dbutil {
/** Creates a new instance of dbutil */
public dbutil() {
Connection conn;
public void connectDB(){
conn = ConnectionManager.getConnection();
public void closeDB(){
try{
if(conn != null && !conn.isClosed())
conn.close();
}catch(Exception excep){
The main error is occuring at the following lines connectDB() and closeDB() in the class student manager. The class dbutil is in an another package.with an another file called connectionManager which establishes the connection with DB. The dbutil has the openconnection and close connection methods. I have not yet written the insert statements in StudentManager. PLease do Help me

NoClassDefFound error when using custom Java package in scripting QPAC

Hi,
I compiled a little Java-package (.jar), which contains a class that uses
com.adobe.workflow.datatype.form.FormDataTypeInstanceImpl.
I put my library in the lib folder of JBoss (...\server\all\lib).
Then I'm was trying to invoke my custom class in the scripting QPAC. But I'm constantly getting the error message
NoClassDefFound com\adobe\workflow\datatype\form\FormDataTypeInstanceImpl. I already put
adobe-wkf.jar (and various others) in the lib folder of JBoss. Without ever succeeding. Unfortunately.
I'm going mad about this.
Is there a way to address a custom package in the scripting QPAC, which uses
FormDataTypeInstanceImpl?
Steve

Removing the LiceCycle jars from the lib folder did not work. I still get the same error message.
What I wanted to do is provide some basic utilities, without having to spend a lot of time designing QPAC user interfaces.
My utility class contains methods like this one:
@param
pFormData
@return
@throws
ParserConfigurationException
@throws
SAXException
@throws
IOException
public static
org.w3c.dom.Document formToXml
FormDataTypeInstanceImpl pFormData
throws
ParserConfigurationException, SAXException, IOException
byte
data = pFormData.getXFAData
InputStream objXMLInputStream =
new
ByteArrayInputStream
data
// create new Document object
DocumentBuilderFactory objFactory = DocumentBuilderFactory.newInstance
DocumentBuilder objBuilder = objFactory.newDocumentBuilder
org.w3c.dom.Document objDocument = objBuilder.parse
objXMLInputStream
return
objDocument;
Even without ever invoking the aforementioned method, I get the error
NoClassDefFound: FormDataTypeInstanceImpl. Which is pretty weird.
Do I have to write my own classloader?
Steve

How to find classes in a java package

i am writing a java IDE. i want to extract all class names from a java package eg. java.lang (through coding). how can i do that.
Thanks in advance

File file = new File("path to your jar file");
JarFile jf = new JarFile(file);
Enumeration e = jf.entries();
ZipEntry ze = null;
while(e.hasMoreElements()){
ze = (ZipEntry) e.nextElement();
ze.toString(); // gives you the file name
you have to understand java.util.jar java.util.zip packages for working with jar/zip files.
Hope this helps

How to import java package in form 10g

hello
i have make a java package but its not looking so far possible to include it in java import list, how i can import it in form 10 g

hi,
if classpath does not work you can try to add your jar file at this registry key :
HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\KEY_DevSuiteHome\FORMS_BUILDER_CLASSPATH
Engin.

Problem with Java-Packages in JavaFX-Scripts

Hello!
What I'm trying to do is using a class I've built in my project in a JavaFX-Script, my problem is that the compiler keeps telling me my package wouldn't exist.
My filestructure is basically the following:
src
|-com.foo.java
|-- MyClass.java
|-com.foo.javafx
|-- MyFXScript.fx
I've tried importing the package or just writing the fully qualified classname when trying to create an instance, the messages didn't differ. I'm not at home right now so I don't remember the exact compiler-message, but it was something like "Package does not exist: com.foo.java".
Any ideas? :-)
Kind regards,
Joshua
Edited by: gnrx on Jan 12, 2009 5:55 AM

It works on my system.
MyClass.java
package com.foo.java;
public class MyClass {
    @Override
    public String toString() {
        return "My Class";
MyFXScript.fx
package com.foo.javafx;
import com.foo.java.*;
var myClass = new MyClass();
println(myClass);standard-run:
My Class
browser-run:
jws-run:
midp-run:
run:
BUILD SUCCESSFUL (total time: 3 seconds)

Java packages and dependency

When java was being developed, what was the philosophy behind allowing packages to be mutually dependent?

Hello Steve,
The Acyclic Dependencies Principle tells us that no cycles should exit in a model depicting the dependencies between packages. From what I can gather this is useful when developing large software systems, as each package becomes a viable work unit for an engineer or small group of engineers to control as a series of releases. If the ADP is not complied with, cycles may exist in the dependencies between packages. If a change is made to one of those packages within a cycle, then an ugly situation develops as the repercussions of the change are looped through the cycle back to its source and so on.
The thing is though, during my readings I came across a statement that said Java packages were mutually dependent. I was just wanting to know why a language that utilises object oriented technology, left the practice of the ADP up to the descretion of the developer? Is the full implementation of ADP on a software system an ideal world scenario?
Anders.

Java package and c++ header files

What is the difference between importing java package and including header files in c++?

I do not know .. have been away from C/C++ for a long time...
As much as I remember you can only import one header file each time... also when you import a header file you can just call methods from the header file automatically ...
However I could be very wrong on this .. really lost touch from C/C++ ...
regards,
Sim085

Error occured while running .java package in BPEL

Hi All,
I'm trying to run .java package which is using RIDC components (GET_FILE) option.
I have set my local IP address in the config.cfg file also and restarted.
Still i'm getting below error in Jdeveloper when I run the package.....
oracle.stellent.ridc.protocol.ProtocolException: Unable to initialize connection idc://tgreenspence:4444
*     at oracle.stellent.ridc.protocol.intradoc.socket.SocketConnectionManager.initializeConnection(SocketConnectionManager.java:35)*
*     at oracle.stellent.ridc.protocol.intradoc.socket.SocketConnectionManager.initializeConnection(SocketConnectionManager.java:22)*
*     at oracle.stellent.ridc.protocol.impl.SimpleConnectionPool.acquireConnection(SimpleConnectionPool.java:44)*
*     at oracle.stellent.ridc.IdcClient.sendRequest(IdcClient.java:151)*
*     at test.TestRIDC.TestRIDCGetFile.main(TestRIDCGetFile.java:52)*
Caused by: oracle.stellent.ridc.protocol.ProtocolException: java.net.ConnectException: Connection timed out: connect
*     at oracle.stellent.ridc.protocol.intradoc.socket.SocketConnection.connect(SocketConnection.java:52)*
*     at oracle.stellent.ridc.protocol.intradoc.socket.SocketConnectionManager.initializeConnection(SocketConnectionManager.java:33)*
*     ... 4 more*
Caused by: java.net.ConnectException: Connection timed out: connect
*     at java.net.PlainSocketImpl.socketConnect(Native Method)*
*     at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)*
*     at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)*
*     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)*
*     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)*
at java.net.Socket.connect(Socket.java:529)
*     at java.net.Socket.connect(Socket.java:478)*
*     at java.net.Socket.<init>(Socket.java:375)*
*     at java.net.Socket.<init>(Socket.java:189)*
*     at oracle.stellent.ridc.protocol.intradoc.socket.SocketConnection.createSocket(SocketConnection.java:126)*
*     at oracle.stellent.ridc.protocol.intradoc.socket.SocketConnection.connect(SocketConnection.java:44)*
*     ... 5 more*
What will be the solution ??
Thanks,
Nir

take the code out of bpel. run it standalone. does it work?
-ryan

Just Starting out with java packages

Hello,
I'm a beginner and I'm starting out with java packages.
I wrote two simple .java files, one test program and one containing a simple class.
Both files are compiling without errors but When I run the program I get an error NoClassDeffoundError.
I use the import <package> statement And I think I'm using the CLASSPATH variable correctly.
SET CLASSPATH=d:\nopol
path for the .java containing the test class is:
d:\nopol\utilities \myapp.
In the test file I use "import utilities.myapp.*.
I would be very happy if anyone could help me
Thanks beforehand
Nopol.

The test file should be in d:\nopol, if it's not a part of your package utilities.myapp. Everything should be compiled from d:\nopol, the test class with "javac ClassName.java" and the class in the package with "javac utilities/myapp/ClassName.java".
Your classpath seems fine for now, though. But yes, do add the period there, otherwise you could run into problems later.

Problem finding native methods in java packages

Hi,
I have a java class which uses some native methods written in OCamL. I wrote a C file which calls the OCamL code, and created the corresponding shared library using the jni. I then tested my java file and everything works fine, I can nicely call the OCamL functions. However, I need this java file to be included in a package, but whenever I add the line:
package somepackage;
on top of the java code, my java file simply doesn't seem to find the C and OCamL implementation anymore :
javac -cp :./path/of/somepackage
-Djava.library.path=/full/path/of/somepackage MyProgram args
Exception in thread "main" java.lang.UnsatisfiedLinkError:functionName
at somepackage.ClassName.functionName(NativeMethod)
I have of course put everything (java, C, .h , libsomelibrary.so, and OCamL files) in a directory called somepackage, and written another java file which creates an instance of the first one from outside the package, imports the package, and calls its methods in main(). It just doesn't work anymore.
I then added a simple hello-world function (not C nor OCamL code) to the java file inside the package. And when invoked from outside, it worked. Question is then... Am I forgetting something to be done, in order to get C and CamL files efectively included in the java package (same as "package somepackage;" in C or OCaml, perhaps)??? Why isn't the java file able to find them inside its very own directory (having into account that without the package definition it worked well)?
Thanks,
PS Im using jsdk 1.4.1 on lunyx redhat 8.0

Did you change the name of the function in the library, too?
If the function name was
"Java_YourClass_functionname",
it should be now
"Java_path_to_your_package_YourClass_functionname".

Use of Java packages in Java stored procedures? (Oracle 10.2)

Hi all-
Does Oracle's Java stored procedures support Java packages? In all the examples I've seen, packages are never used, and when I added one to a test file, it compiled it just fine, but referencing the class from the package itself resulted in a compiling error.
In other words, it seems to make absolutely no difference if I preface my Java class with
package com.mycompany.whatever;
and while I can "import com.mycompany.whatever.MyClass" in another Java file, it seems to not care at all whether I do so or not.
Thanks for any clarification,
Ilford

Hi Ilford:
Sure you can use fully package notation in your Java classes.
Look at this Java source code:
http://dbprism.cvs.sourceforge.net/dbprism/cms-2.1/src/com/prism/cms/core/
All of them are Java Stored procedures.
Best regards, Marcelo.

Free Java Packages

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