How to call VB code to JAVA

hello,
can we create DLL files in VB. please write step by step code. please help me.

Are you asking about how to create a DLL using Visual Basic?
That question does not have anything to do with Java.
Please find a forum about Visual Basic somewhere and ask your question there.

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How to call c++ code from java

i have a third party dll written in c++. I want to call its methods in java. I searched web and found that I have to use JNI for this. I have seen examples on web writing c++ code and then using it from java through JNI, but can anybody please point to me the example where i have a predefined library or dll in c++ and i have to call it in java. I think that I may have to declare methods in library as native in java and then write a wrapper implementation (dll) in c++ which actually calls the library or dll functions. But, then how will I call methods of dll from my wrapper code.
Any examples, please point
Regards,
Farooq

There's a JNI forum here that may be a better place for this question; though given the general nature of the question, I suspect that they'll refer you to a tutorial. good luck.

How to call Jakarta Ant via JAVA?

Hi.
My application has a new menu. This menu creates a build.xml Ant file.
Now, when this menu is invoked , its action should call
Jakarta Ant, after creating the xml file, so that the build.xml will
do what is necessary.
How can I do it? That is, how to call the Ant via java?
Is there any way to use an Ant object?
Thanks?
Rodrigo Pimenta Carvalho.

There is a slight problem in that
PorjectHelper.configureProject is deprecated, but
that is what Main calls...maybe someone else will
complete this thread with an alternative call.The javadoc recommends using the non static method parse() instead. This is available by implementing class ProjectHelperImpl. An alternative to the code above might look like this:
        Project ant = new Project();
        ProjectHelper helper = new ProjectHelperImpl();
        ant.init();
        helper.parse(ant, new File("build.xml"));
        ant.executeTarget("clean");you might also want to add a logger so you can see the output of events generated by ant. The DefaultLogger class would be used like this. Simply add the code before you call the ant.init().
        DefaultLogger log = new DefaultLogger();
        log.setErrorPrintStream(System.err);
        log.setOutputPrintStream(System.out);
        log.setMessageOutputLevel(Project.MSG_INFO);
        ant.addBuildListener(log);

How to call external files from java?

How to call external files in java. For example how to call a *.pdf file to open in its default editor(say Acrobat), or a *.html file to open in the default browser or a *.txt file in a notepad etc..,
In my program i have *.chm (Compiled Windows HTML Help) help file. how to open it in its default editor it?

Jayarathina_Madharasan wrote:
no one answered my questionHi what wrong did i do...basically insulted all the volunteers here who took the time to consider your question and try to offer you help. Other than that, you did nothing wrong.
From JavaRanch :
And even if an answer doesn't solve your problem, even if it should totally miss the point - the best thing to do to motivate others to continue trying to help you is showing respect and gratitude for the investment of time that was put into dealing with your issue.
Edited by: Encephalopathic on Apr 14, 2008 10:01 AM

How To Call HTML Page Through Java Swing Page ???....

Hi All ;
Please Can You Tell Me How To Call HTML Page Through Java Swing Page ....
Regards ;

Hi,
you can use HTML fragments on a panel.
http://java.sun.com/docs/books/tutorial/uiswing/components/html.html
However, to integrate a browser you need 3rd party software like IceBrowser
If you Google for: HTML Swing
then you find many more hints
Frank

How to call gnuplot command from java

Hi there,
In our course, we are required to develop an GUI for gnuplot. In case you don't know about gnuplot, it's a plotting program and has lots of command. We want to use java and swing, but now we don't know how to call gnuplot command from java, or how to execute a shell command(script) from java.
By the way, since we need read in files with several columns of data and allow user to select a column, we want to use JTable. Is that reasonable?
Thanks a lot for any suggestions!
Jack

Hi, there:
Will using JTable add much overhead? I may have to use several JTables and switch among them. I can add scroll bar to or edit JTables, right?
BTW, do you have experience about gnuplot? Can I find the command tree of gnuplot somewhere? Or do you know a better place to post question about gnuplot? unix/linux group, maybe.
Thanks,
Jack
P.S. Would you guys answer my question after I use up my duke dollars? :- )

How to call stored procedures from java program?

I have tried to run a program that calls a stored procedure on MySQL
server version 5.0.17 by using connector/j 5.0, but it always fails on the
statement: con.preparecall() ,
have looked on the internet and found out that people can all mysql
stored procedure all right in their programs, really dont know what's
wrong with this small peiece of code:
import java.sql.*;
public class TestDB {
      // procedure being called is:
     CREATE PROCEDURE `dbsaystorm`.`getsite` ()
     BEGIN
        select name from tblsite;
     END
     public static void main(String[] args) {
          try {
              //Class.forName("org.gjt.mm.mysql.Driver");
              Class.forName("com.mysql.jdbc.Driver");
              Connection con = DriverManager.getConnection("jdbc:mysql://localhost/dbname",
                        "user", "pwd");
       * executing SQL statement here gives perfect correct results:
        // PreparedStatement ps = con.prepareStatement("select name from tblsite");
        // ResultSet rs =ps.executeQuery();
              // but in stored procedure way...
              //it fails here on this prepare call statement:
              CallableStatement proc = con.prepareCall("call getsite()");
              ResultSet rs =proc.executeQuery();
              if (rs == null) return;
              while (rs.next()){
                  System.out.println("site name is: "+ rs.getString(1));
              rs.close();
          } catch (SQLException e) {e.printStackTrace();}
           catch (Exception e) {e.printStackTrace();}
}it always gives this exception:
java.lang.NullPointerException
     at com.mysql.jdbc.StringUtils.indexOfIgnoreCaseRespectQuotes(StringUtils.java:959)
     at com.mysql.jdbc.DatabaseMetaData.getCallStmtParameterTypes(DatabaseMetaData.java:1280)
     at com.mysql.jdbc.DatabaseMetaData.getProcedureColumns(DatabaseMetaData.java:3668)
     at com.mysql.jdbc.CallableStatement.determineParameterTypes(CallableStatement.java:638)
     at com.mysql.jdbc.CallableStatement.<init>(CallableStatement.java:453)
     at com.mysql.jdbc.Connection.parseCallableStatement(Connection.java:4365)
     at com.mysql.jdbc.Connection.prepareCall(Connection.java:4439)
     at com.mysql.jdbc.Connection.prepareCall(Connection.java:4413)
     at saystorm.server.data.database.TestDB.main(TestDB.java:29)
where have I gone wrong?
when I commented out the statement that makes the procedure call and call preparedstatement to execute SQL select statement, it gave perfectly correct result.
it looks like there is no problem with java prog accessing MYSQL server database, but the it seems that it's just java can't call stored procedure stored on the mysql server version 5.
can it or can't it? if it can, how is that accomplished?

It is a bug in the driver because it shouldn't be
returning that exception (null pointer) even if you
are doing something wrong.
Are you using the latest version of the driver?
The stored procedure runs when you run it from the
gui/command line using a MySQL tool - correct?
As suggested you should be using the brackets. What
is the data type of the 'name' field?
You could try returning another value like one of the
following
select 1, name from tblsite;
select name, 1 from tblsite;
That might get around the bug
Additionally try just the following...
select 'test' from tblsite;yes, the driver used is in connector/j 5.0--the lastest one, and the
procedure can run correctedly at either command line or GUI mode
with no problem whatsoever, the returned data type is string type,
I have not got the chance to test it again with those values you
suggested, as I have abandoned the laptop I used to write that code
initately. There have been some other really weird cases happened on
that computer. I guess that must be something wrong with the JVM
installed on it, it was upgraded from jre5.0.04 to 06, and to 09.
something within hte JVM must have been messed up(the only reasonable
explanation). Because the same code runs correctly on my new laptop,
using the same environment: jvm 5.0_09, mysql 5.0.18, connector/J 5.0.
that old laptop really was a nightmare.

How to convert Vb code into java?

Hi,
I want to know how to make conversion a visual basic source code into java. The conversion could be (1:1) scale.
Is there any compilers making the live easier (solving this problem) ?
Thank you all.
Abu_ramla

Use the JNI. VB doesent actually do anything on its own. Its just a series of calls on COM objects to performs all its work. You can call these same COM objects using the Java Native Interface or JNI. You wont have access to things designed in VB though like forms, you will have to redesign those.
This will take extensive knowledge of COM, VB, Java, and JNI. It will take you about 1 year to get up to speed. I would say to not do this.

How to call a servlet by java standalone application

//program related to calling a servlet by java standalone application and printing the response on console
import java.io.*;
import java.util.*;
import java.lang.Object;
import java.net.*;
public class Program
     public static void main(String s[])
     System.out.println("Hello this programm defines about how to call a servlet with a java application ");
     try{
          URL servlet = new URL("http://localhost:8080/anchor/studentform.html");
          URLConnection conn=servlet.openConnection();
          conn.setDoOutput(true);
          InputStreamReader isr=new InputStreamReader(conn.getInputStream());
          BufferedReader br = new BufferedReader(isr);
          String str =br.readLine();
          System.out.println("Source code is" +str);
     catch(IOException e)
     System.out.println("exception is" +e);
i am able to read only one line of the form, please help me out to read the whole form (file)

You are only reading one line? Why aren't you reading the data in a loop? E.g. a while loop. (Keep reading till readLine returns null)
Kaj

How to call BPM process from Java

Hi All,
Can anybody help how to call a BPMN process from java.Please give any sample exaple on this.
Thanks,
Ganesh

For 11g BPM please look at this post. Re: Getting while running the BPEL process from java
It references an ATeam example app that can start processes from a web client. But the Java APIs are described too.

How to Call C++ Method from Java

I need to call C++ method from Java.
I have gone through the JNI tuorial , but was not able to pin point things.
I read that :
You have to write JNI c functions which then call your C++ member functions.You need to write a JNI function which will call new on your C++ class.
Now i have java class :
Java Code JavaClass.java ---->
class JavaClass{
public native void nativeMethod();
    static
        System.loadLibrary("NativeCppCode");
     private void callCppMethod()
          //call C++ method
                JavaClass jvc = new JavaClass();
                jvc.nativeMethod()
}Cpp Code:
NativeCppCode.h---->
class NativeCppCode
public:
    getValue();
    setValue();
private:
   int a;
JNIEXPORT void JNICALL Java_JavaClass_nativeMethod(JNIEnv *env
               ,jobject obj);NativeCppCode.C---->
NativeCppCode::getValue()
   return a;
NativeCppCode::setValue()
   a = 1;
JNIEXPORT void JNICALL Java_JavaClass_nativeMethod(JNIEnv *env
               ,jobject obj)
NativeCppCode* nativeInstabce = new NativeCppCode();
NativeCppCode.setValue();
}Is this the correct way to do it.
Any suggestion would be a great help to me

tryit wrote:
I need to call C++ method from Java.Not possible.
JNI uses C methods.
Is this the correct way to do it.Same way you would do it in any C/C++ method (not java)
       MyClass* p = ....
       p->doit();
Common idiom for the pointer in the above is to pass it back and forth to your java code as a java long. You cast it it and from your class pointer. Provide an explicit java method to free it when done. Besides providing the explicit method also implement a finalizer to free it as well (however that is a fail safe and should not be relied upon.)

How to call other program in java

how do i write code to call a program, software in window envirenment?
such as opening Microsoft Excel files using Microsoft excel?
plz help

public static void main(String[] args)
         try
                 Runtime.getRuntime().exec("Book1.xls");
         catch (IOException ed)
}i tried, but it not working , plz help

How to call Match code ?

hello Gurus,
Normally We can assign a match code to a dynpro field using Match code ID 'Match code' , and this match code will be called automatically when we press F4 for the field. But now i need to call this match code for another Event . ( From a module )
FIELD vbeln MODULE zmatchode_help.
Module zmatchode_help.
call standard match code. ==> How to call this standard match code
ENDMODULE.
Thanks for your help

You can pass the matchcode name into function module F4IF_FIELD_VALUE_REQUEST .. have a look at function module HELP_VALUES_GET_WITH_MACO for an example of this in standard SAP.
Jonathan

How to access assemly code in java

dear i want to access assembly code in java . plz help me. thanx.

Assembly, C, C++, Fortran, etc. can be accessed most directly via the Java JNI facility. For assembly, you'll have to write a native C/C++ layer to accept the JNI call and forward it to the assembly code. If the assembly code is C-callable (i.e. it conforms to the C calling conventions on your platform) then the job is really no more difficult that calling any C routine.
Chuck

How to intergrate c code in java?

dear sir
i would like to know how to intgrate the code of c in java......i have made a gui form so that i want c code for running the process.would yu kindly explain the code.......

dear sirDid you know there are also female software developers?
i would like to know how to intgrate the
code of c in java......i have made a gui form so that
i want c code for running the process.would yu kindly
explain the code.......You can do it through JNI:
http://java.sun.com/developer/onlineTraining/Programming/JDCBook/jni.html

How to call VB code to JAVA

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