Java

Re: passing values across functions

7-Dec-10 10:20

I suggest you go through a tutorial. Following is one.

http://download.oracle.com/javase/tutorial/[^]

TorstenH.7-Dec-10 19:44

TorstenH.

7-Dec-10 19:44

Ah - now I see what you mean (or at least I think I do so).

You fault was not to follow simple rules. Use the naming conventions - use Checkstyle.
If you do so, you will realize, that Response is a typ of object and not a variable. You need to differ between what is a name of a variable/member (starts with lower character) and what is a type (starts with upper character).

So if you write your method handle() in class Handler like this:

public void handle(final Response aResponse){ // aResponse to make visible this is a argument of this method
     // someWiredOperations();
}

...it should do the job. Then you can use the Object Response and squeeze your info from it.

regards
Torsten

I never finish anyth...

Re: passing values across functions

Richard MacCutchan7-Dec-10 11:17

Richard MacCutchan

7-Dec-10 11:17

Function handle() needs to be rewritten as handle(function arguments here). Perhaps you have not explained your problem too clearly.

Just say 'NO' to evaluated arguments for diadic functions! Ash

glassfish server 3 start failed ????

aa_zz6-Dec-10 21:06

aa_zz

6-Dec-10 21:06

hi all.
I using netbean 6.9.1 and using web(GlassFish). but when run web, it error ==> "glassfish server 3 start failed"

please help me
thanks

nothing

Luc Pattyn6-Dec-10 21:13

Luc Pattyn

6-Dec-10 21:13

most servers have a log file. Did you look for it?

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles] Nil Volentibus Arduum

Please use <PRE> tags for code snippets, and update CP Vanity to V2.0 if you haven't already.

Alok Sharma ji7-Dec-10 1:30

Alok Sharma ji

7-Dec-10 1:30

did you checked that there is no other server or program which is using same port as your glassfish, besides as a tip glassfish is stupid ,it gives problem many times or you can say its still incomplete or buggy, better use tomcat(not installer for netbeans) or sun java application server.

Skynet_Code7-Dec-10 20:55

Skynet_Code

7-Dec-10 20:55

If you take a look to Server Tab in NetBeans IDE, probably you'll find that needs an inexistent file into ../domains/domain1 folder. Try to start it from IDE without any project (Start Server) or manually from <<install_dir>>/glassfish/bin/startserv.

Best Regards

Equivalent Java Function - having a return type of BSTR (How to implement BSTR* in JAVA?)

Spi-der23-Feb-11 1:42

Spi-der

23-Feb-11 1:42

May be that you are having another server listening on the same port. Stop other services on the port and then start the GlassFish server. If there is no other problem it should run cool. Smile | :)

amarasat6-Dec-10 8:33

amarasat

6-Dec-10 8:33

I am having a ComServer, and its outlined functions are implemneted in C++. Below is the Cpp function.

HRESULT cIntuneServer::GetActiveProjectName(/*([out]*/ BSTR* nameOfProject)
{
        CComBSTR projectName(L"\\Default\\");

        *nameOfProject = projectName;
        return S_OK;
}

I tried to implement the same function in Java:

JIString outStr = new JIString("");
        dispatch.callMethod("GetActiveProjectName", new Object[]{outStr});
        System.out.println("Out String = "+outStr.toString();

OUTPUT:

Out String = [Type: 1 , []]

How do i implement this in java?, I knew i am doing something worng, how do i get the BSTR* value to the OutStr in Java?

Re: Equivalent Java Function - having a return type of BSTR (How to implement BSTR* in JAVA?)

David Skelly6-Dec-10 22:27

David Skelly

6-Dec-10 22:27

I'm not a JNI expert but a quick google search suggests this is not so straight-forward. Here is how one person describes it:

a BSTR is a funky kind of Microsoft String object, and converting between them and C strings is complicated (and from there to Java Strings adds yet another step)

Google "BSTR java string" brings up lots of articles about it. One of them may help.

Re: Equivalent Java Function - having a return type of BSTR (How to implement BSTR* in JAVA?)

jschell7-Dec-10 10:22

Re: Equivalent Java Function - having a return type of BSTR (How to implement BSTR* in JAVA?)

7-Dec-10 10:22

My guess is the question is incomplete.

Java doesn't access random dll methods.
One must use JNI to do it.

I believe the poster is using a dynamic 3rd party wrapper for JNI because a similar post with info to that effect showed up in the Oracle Java forums.

amarasat7-Dec-10 11:57

amarasat

7-Dec-10 11:57

You are right jschell, i posted it at oracle forums too, the thing is no one was actually helping at the J-Interop forum, so i have been posting at some other good forums for help etc...

My only aim is to read a string from a cpp function, doesn't matter if i am using a wrapper. At least if someone could help me how to do this using Native or Standard Java without a wrapper like an example or something. Maybe i can proceed from there.

Re: Equivalent Java Function - having a return type of BSTR (How to implement BSTR* in JAVA?)

Skynet_Code7-Dec-10 21:49

Skynet_Code

7-Dec-10 21:49

Having a C++ written class, you need to convert it into a shared library (so or DLL); for example, suppose you can embed the snippet you are using in C++ (the one you posted before) into a function like LPSTR yourSnippet(). You can dynamically link the generated shared library from Java using: static {System.loadLibrary("libreria.dll");} and declaring method as native : native String getCadena();
When building wrapper header file (with javah) you'll see in .h file type corresponging :
JNIEXPORT jstring JNICALL <<java_function_name>>_getCadena (JNIEnv *, jobject)
You just have to write a C file including the generated header file you builded with javah, and implement <<java_function_name>>get_Cadena function with: return yourSnippet(); . Just compile and link them as shared library 'libreria.dll' and you got it!

I hope helped you.

Best Regards.

Re: Equivalent Java Function - having a return type of BSTR (How to implement BSTR* in JAVA?)

jschell9-Dec-10 10:14

Re: Equivalent Java Function - having a return type of BSTR (How to implement BSTR* in JAVA?)

9-Dec-10 10:14

Skynet_Code wrote:
Having a C++ written class, you need to convert it into a shared library (so or DLL);

Jinterop is a Java library that by its very nature provides direct access to existing shared libraries. It does that by using dynamic access (via OS calls) in it own jni library.

Thus one does NOT need to create another shared library when using that API.

Jnative is another example of the same sort of thing.

jschell9-Dec-10 10:16

connect postgreSQL with netbean(webservice, glassfish) ????

9-Dec-10 10:16

amarasat wrote:
the thing is no one was actually helping at the J-Interop forum

Googling using the following terms seems to provide topics

jinterop bstr

aa_zz6-Dec-10 2:33

aa_zz

6-Dec-10 2:33

hello all.
please guide for me connect postgreSQL with netbean(webservice, glassfish).

thanks very much.
phan

nothing

Re: connect postgreSQL with netbean(webservice, glassfish) ????

David Skelly6-Dec-10 22:19

David Skelly

6-Dec-10 22:19

Google "postgresql glassfish". There are a number of articles that tell you how to do it.

Printing the contents of a collection

SWDevil4-Dec-10 22:37

4-Dec-10 22:37

Hi,

I have a web application which has a simple java class.

In my java class I have a function that returns Collection<classt>.
For example:
Collection<classt> coll = funcA();

I want to somehow print the contents of the coll collection to the screen - this is for debugging purposes.
How can I do this?
I tried throwing an exception - RuntimeException - but it only accepts a string.

I tried converting the collection to a string, but it doesn't work:
Collection <classt> col = funcA();
String str1 = "";
Object[] arrCol = col.toArray();
for (int i = 0; i < col.size(); i++)
{
str1 = str1 + arrCol[i]+ " ";
}

Is there another way I can view during runtime the contents of the collection?

By the way, I am very new to java - i am a C++ programmer...

Thanks!

Cedric Moonen4-Dec-10 22:43

4-Dec-10 22:43

Did you try the toString method ?

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

SWDevil4-Dec-10 22:58

4-Dec-10 22:58

toString on what? on arrCol[i]?
arrCol[i].toString() gives me a cannot find symbol error.

Cedric Moonen4-Dec-10 23:21

4-Dec-10 23:21

On the Colection.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

SWDevil4-Dec-10 23:31

4-Dec-10 23:31

Do you mean:
Collection col = funcA();
String sCol = col.toString();

If so it doesn't work...

If it's not what you meant, I would appreciate it if you could write some code since I am very new to Java...

Cedric Moonen4-Dec-10 23:56

4-Dec-10 23:56

SWDevil wrote:
If so it doesn't work...

What do you mean by it doesn't work ?

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

SWDevil5-Dec-10 0:41

5-Dec-10 0:41

I mean that it does not print out the contents of the array.

it prints out a number of the class or something like that: 116c99d.

Cedric Moonen5-Dec-10 1:38