Java interfaces as c++ controls?

in my c++ program (windows), i need to use java interfaces (i.e. JFrame or JButton). i want to use c++ interface as container and java interface as its components (controls), is this possible? if yes, what is right tech to do that?
thx

Have a look at JNI (Java Native Interface). This is a way to link c++ and Java code.

Similar Messages

Can java interface with windows to do things

Good evening
I am a student and i am trying to do a project and i wanted to ask everyone here before i asked my teacher,
what i am trying to do is this . create a class that can be run from the desktop that will give me a window of option to do following things
1) install printer drivers
2) run a uninstall program
3) use keys like CTRL ALT SHIFT AND F6 to pop open windows, and is there a way that can have a password entered automatically?
4) change registry keys
5) call up reg keys
6) copy files from one computer ( laptop ) to my lab class over the network onto a specific profile?
if someone out there can just tell me weather or not Java has the capiablity of interfacing with windows control panel, or any of the above stuff let me know and just give me a push in the right direction Please.
Derek

Speaking of Java itself.
1) install printer driversNo
2) run a uninstall programNo
3) use keys like CTRL ALT SHIFT AND F6 to pop open windows, and is there a way that can have a password entered automatically?Depends what you mean but you might be able to do this using the Robot (in the awt package.)
4) change registry keysNo
5) call up reg keysNo
6) copy files from one computer ( laptop ) to my lab class over the network onto a specific profile?Depends on what you mean. Java can be used to send files to other computers. Doing that requires that you understand how the other computer (not your compute) processes are controlled.
You can of course do all of the above with windows API (not java) calls. And this is the forum about the JNI interface which allows a Java program to access native APIs, like the Windows one. It does however require quite a bit of detail work in a language besides Java, like C or C++. It is going to be easier if you have quite a bit of experience with those. If not then plan on spending a lot of time learning (factor that into how long it will take to do your project.) And of course you would need to research the APIs for all of the above.
If it matters the registry one is rather easy in terms of the windows API. And you can find many examples of C/C++ code to access it.

(262119469) Q WSC-15 Is the .ctrl file just a java interface?

Q<WSC-15> Is the .ctrl file just a java interface?
A<WSC-15> Yes. Any control that you generate in Workshop is really an interface definition
for the methods that the enterprise component understands. You can then use those
methods in the interface directly in your .jws code. The actual object that implements
that interface and acts as a broker to the enterprise resource is generated during
the compilation of the web service. This helps keep your web service code very simple.

I don't see a way to do this. You want to transform a function to a variable. Even if that's a variable holding a function, these are incompatible.
But you can just override the function in the class instantiation:
var responder = Response {
override function doResponse(input: String): String {
return "JavaFX Rocks!"
}

Java Interface Question.

There are classes in the Java SDK, such as the Interface:
org.w3c.dom.Document
that have factory methods in them that carry out actual operations.
But how can this be possible, because when I program an interface:
public interface test {
public void setString(String s);
It will only compile thus, with no implementation on the method signatures?
How do Java interfaces with factory methods to this?
org.w3c.dom.Node is another one. Where does the functionality/method implementation
come from?

public interface MyInterface {
     public void method1();
class MyImplementation implements MyInterface {
     public void method1(){
public class MyFactory {
     public static MyInterface createMyInterface(){
          return new MyImplementation();
public class Test{
           public static void main(String args[]){
                  MyInterface x=MyFactory.createMyInterface();
                  x..method1();
}Now can you understand this? Assume all These classes are separate classes. This is not a problem with inner classes. Before make a reply, try to understand it or post a reply as saying it is not clear rather than posting this kind of post.

Are Java Interfaces 'free'?

From a performance point of view, are Java interfaces free?
That is, if I have:
class Foo
public void bar() { ... // some code }
}and I change it to:
interface Foo
public void bar();
class FooImpl implements Foo
public void bar() { ... // some code }
}And I call one or other of the Foos like
Foo foo // A parameter, field or local variable.
foo.bar();Does calling foo through an interface add any overhead that calling it direct in the first example not? As I understand it, all methods are 'virtual' in Java, so it should perform the same in either case.
Thanks for any of your thoughts.
Rupert

rupertlssmith wrote:
YoungWinston wrote:
The Second Rule of Program Optimization (for experts only!): Don't do it yet.
- Michael A. Jackson
Basically, don't worry about it. Worry about writing clear, correct, object-oriented code.
Wierdly enough, in the long run, that is more likely to help than anything else you can do, should (and if) you ever need to worry about optimization in the future.
WinstonThanks for the advice. I can write good clear OO code. I am now at the future and worrying about optimization, so have made it past the second rule!Then you exactly know where your bottleneck is from the profiler you've used. Did it tell you that your interfaces are the bottleneck? If so, why do you even bother to ask here?

Java interface with Crystal Reports

Post Author: [email protected]
CA Forum: JAVA
Hello everyone,I need to build a Java interface for JSP to interact with crystal reports.Could anyone recommend any book or forward me the url's where I can find the related material with examples. Eagerly Waiting for reply!Thanks,Prathima.

Post Author: MJ@BOBJ
CA Forum: JAVA
The latest version of the Java Report Component (JRC) is available from the Diamond website. This download is actually a plugin for Eclipse but you can still use the JRC runtime jars to use the SDK APIs in your JSP page. You will also find lots of resources such as samples, videos, and forums to help you get started. You can also refer to the DevLibrary for more information.

Java interface as an Axis Web Service

Hi averybody:
I'm developping an application containning a web service using Axis 1.2 with Tomcat 5.5.7. I had design a Java interface for the WS and create mi deploy.wsdd file for it using Message-style.
Everithing goes right in deployment process, but when i try too use de WS from a client, i get de following error:
Exception in thread "main" AxisFault
faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
faultSubcode:
faultString: java.lang.InstantiationException: chatService.IChatServer
faultActor:
faultNode:
faultDetail:
{http://xml.apache.org/axis/}hostname: visit18 (este el nombre de esta m�quina)
java.lang.InstantiationException: chatService.IChatServer (esto es lo que da problema)
at org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder
.java:260)
at org.apache.axis.message.SOAPFaultBuilder.endElement(SOAPFaultBuilder.
java:169)
at org.apache.axis.encoding.DeserializationContextImpl.endElement(Deseri
alizationContextImpl.java:1015)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(AbstractSAXPar
ser.java:585)
at org.apache.xerces.impl.XMLNamespaceBinder.handleEndElement(XMLNamespa
ceBinder.java:898)
at org.apache.xerces.impl.XMLNamespaceBinder.endElement(XMLNamespaceBind
er.java:644)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(
XMLDocumentFragmentScannerImpl.java:1008)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContent
Dispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1469)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(XM
LDocumentFragmentScannerImpl.java:329)
at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.jav
a:525)
at org.apache.xerces.parsers.DTDConfiguration.parse(DTDConfiguration.jav
a:581)
at org.apache.xerces.parsers.XMLParser.parse(XMLParser.java:152)
at org.apache.xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.j
ava:1175)
at javax.xml.parsers.SAXParser.parse(Unknown Source)
at org.apache.axis.encoding.DeserializationContextImpl.parse(Deserializa
tionContextImpl.java:242)
at org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:538)
at org.apache.axis.Message.getSOAPEnvelope(Message.java:376)
at org.apache.axis.client.Call.invokeEngine(Call.java:2583)
at org.apache.axis.client.Call.invoke(Call.java:2553)
at org.apache.axis.client.Call.invoke(Call.java:2248)
at org.apache.axis.client.Call.invoke(Call.java:2171)
at org.apache.axis.client.Call.invoke(Call.java:1691)
at samples.message.TestChatMsg.doit(TestChatMsg.java:64)
at samples.message.TestChatMsg.main(TestChatMsg.java:86)
The code of my interface is this:
public interface IChatServer {
public void connect(SOAPEnvelope req, SOAPEnvelope resp);
public void disconnect(SOAPEnvelope req, SOAPEnvelope resp);
public void publishMessage(SOAPEnvelope req, SOAPEnvelope resp);
public void retrieveMessages(SOAPEnvelope req, SOAPEnvelope resp);
public void retrieveUsers(SOAPEnvelope req, SOAPEnvelope resp);
Can anybody tell me what's happening here...
Thanks.

Hi, did you find out what the problem was ?
I've got the same problem.
Thanks,
Lotte

Can I take Java interface as .h of C?

Can I use Java interface as a substitute of .h files in C?

It almost sounds as if you want to use C, not an OOP language like Java. So why not use C?

Java interfaces allow us to specify limited ways in which otherwise

can anyone explain "Java interfaces allow us to specify limited ways in which otherwise dissimilar classes, from completely different parts of inheritance hierarchy, resemble one another." please?
many thanks.

An interface defines a contract which an implementing class must fulfill. As long as the implementing class is written properly, then it provides a specific, advertised behavior. There are no restrictions as to which classes may implement a given interface (in the sense that there are inheritance restrictions, such as single-inheritance, no inheritance loops, and the like). Therefore, any two arbitrary classes may implement the same interface, and therefore provide the same behavior.
For example, the Iterator interface provides the ability to loop over a collection of objects in a well-defined way. Any class which implements Iterator would be manipulable in the same way, and could therefore be said to resemble each other.

Mediator To Spring Error-Could not convert from java interface to interface

Hi,
I have a requirement to using a Spring component and my composite application would be File Read -> Mediator -> Spring Component -> File Write.
I have to read a file and using mediator map the same to the Spring input and write the Spring component output to a file.
I have created a Java interface ( Package Name - transformtospring , Interface Name - TransformInterface) and also created a Java Class ( TransformImpl ) which implements the Interface in this package. Saved all these artifacts in SCA-INF/src folder of the application.
My Spring Bean configuration file is as follows ( saved the file in the same folder as composite.xml )
<?xml version="1.0" encoding="windows-1252" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:lang="http://www.springframework.org/schema/lang"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:sca="http://xmlns.oracle.com/weblogic/weblogic-sca"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/tool http://www.springframework.org/schema/tool/spring-tool-2.5.xsd http://xmlns.oracle.com/weblogic/weblogic-sca META-INF/weblogic-sca.xsd">

<bean class="transformtospring.TransformImpl" name="TransformBean"/>
<sca:service name="TransformService" target="TransformBean"
type="transformtospring.TransformImpl"/>
</beans>
I have created a Spring Context which uses the above Spring Configuration. When i tried to map the mediator output to Spring , i'm getting an error shown below.
" Could not convert from java interface to interface type wsdl . Exception=java.lang.ClassNotFoundException transformtospring.TransformImpl "
Please do let me know where exactly i'm doing wrong.
Regards,
Sri.

Hi All,
I could able to work this one out now !!!
But i'm having an issue mapping the input to this service. The method signature for the service is as follows:
public byte[] processData(byte[] input) throws Throwable{
So the input for this Service is a byte array. Now i'm mapping the data from a File Input ( Read File - opaqueElement ) to this service directly ( using mediator ).
Now when i have looked into the message in the Enterprise Manager, following is the message structure from Read File input to the service.
<message>
<properties>
<property name="tracking.compositeInstanceId" value="10009"/>
<property name="tracking.ecid" value="bcd04297e25136e7:4869a9c:13316255efc:-8000-0000000000001f79"/>
<property name="tracking.conversationId" value="TJ9PCcbtu3S0DA0GuxsGx13RYUb1NxHNndfk2PC8ukk."/>
</properties>
<parts>
<part name="parameters">
<ns0:processCollaboration>
<arg0>PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz48bnMwOkFkZDJJbnB1dCAgeG1s bnM6eHNpPSdodHRwOi8vd3d3LnczLm9yZy8yMDAxL1hNTFNjaGVtYS1pbnN0YW5jZScgeG1sbnM6 bnMwPSd1ay5jby5qZHdpbGxpYW1zLkFkZDJJbnB1dCcgeHNpOnNjaGVtYUxvY2F0aW9uPSd1ay5j by5qZHdpbGxpYW1zLkFkZDJJbnB1dCByZXF1ZXN0LnhzZCcPG5zMDpudW0xPjEwPC9uczA6bnVt MT48bnMwOm51bTI+MTY8L25zMDpudW0yPjwvbnMwOkFkZDJJbnB1dD4=+</arg0>
</ns0:processCollaboration>
</part>
</parts>
</message>
and the corresponding response message ( No output ) back from the service is:
<message>
<properties>
<property name="tracking.compositeInstanceId" value="10009"/>
<property name="tracking.ecid" value="bcd04297e25136e7:4869a9c:13316255efc:-8000-0000000000001f79"/>
<property name="componentName" value="ProcessCollab"/>
<property name="tracking.conversationId" value="TJ9PCcbtu3S0DA0GuxsGx13RYUb1NxHNndfk2PC8ukk."/>
<property name="compositeDN" value="default/CollaborationToSpring!1.0*soa_a8da1da7-f98f-4935-8d20-da9e7bc003cc"/>
</properties>
<parts>
<part name="parameters">
<processCollaborationResponse>
<return/>
</processCollaborationResponse>
</part>
</parts>
</message>
I have included System.out statements in my Java class , but its not printing anything in the logs.
I'm under the impression that the underlying infrastructure ( mediator ) transparently encodes and decodes data from base64Binary to java byte array. So could anyone help me on this !!!
Regards,
Sri.

Could not convert from java interface to interface type wsdl ??

i have a problem wheni have a problem when i develop bpel using mediator and wire to ejb service. When the mediator wire to ejb service, i found the error : Could not convert from java interface to interface type wsdl.... How to solve the problem?

I followed the case closely (with the same name of classes, methods, etc), but still get the error: “Could not convert from java interface to interface type wsdl.Exception=nl.amis.calculator.Calculator”. I created a Java class to test the lookup and function correctly. However, when I try to wire a Mediator to this Reference, I run into an Interface Conversion Error. I’ve included the line javaInterface = “nl.amis.calculator.Calculator” in file composite.xml, but still get error. Could you help me?

Java interface with xml communication

Hello everybody,
For a project i need to make a java interface with xml communication.
For example ; from 1 laptop I press on a java button and then i need to get a text message on the other laptop.
The java interface is already created now the xml code for communication.
I hope someone can help me how to start with the xml code.
Are there any templates that i can use?

I need to use XML for this, cause it is in the
assignment.As far as communication is concerned, it doesn't matter that you are sending XML. You can send any kind of data. So first find out how to send data, then send data which is XML.
I only want to know if its possible to send data/text
from 1 laptop (windowsxp prof) to the other laptop
(also windows xp prof).Provided the other laptop is running a server that can receive that data.
Maybe its easier if I send data to a specific IP
address?Provided there is a server running at that IP address that can receive that data. You can use an IP address to connect to a server but that has nothing to do with sending the data.
Its important that the communication between 2 system
is in XML language.XML is not a programming language. XML is a format for storing data. You can certainly send XML-formatted data between two computers.
So i hope u have a solution for my problem.The solution would be for you to learn how communication between two computers works in the real world. If you have an assignment that says you have to make communication work, surely there was something taught to you before about how to do it?

Any good article on Java Interface usage principle?

Hi All
I find Java interface is quite good concept, but some expert mentioned in some article, "Don't over use it".
Just wonderring anyone can point me to some good article on the internet on In what kind sceniaro we need use Interface, in which case we'd better not use it.
Thanks in advance.
Steven

Then how do you explain some gurus said" don't overuse interface"?I explain it thus:
(a) it doesn't actually contradict what the article says
(b) 'don't overuse interfaces' is a tautology: it doesn't actually say anything very useful.
On the other hand there's no reason why "some gurus" can't disagree with Holub. I disagree myself to a large extent. You can define your entire API as interfaces, but then you're committed to all kinds of factory methods, and provision of secret implementation classes, etc. This can get pretty tedious pretty quickly. And, somewhere or other, you must have at least one actual class, so that you can have either a static method or a constructor, so you can get hold of your initial factory, or factory builder, or factory builder factory, or factory builder factory builder, or wherever it is that you want to start.
I've used frameworks where there were four different implementation classes for the same interface. Never did find out why. Something wrong somewhere.
When you can keep your base classes stable, I don't see a reason not to use them. 'Base class fragility' is all that Holub is really complaining about, and there are lots of solutions to that, such as 'don't' for a start. Java is chock full of stable base classes.

Java Interface does not accept method that passes ArrayList...Why?

Java Interface does not accept method that passes ArrayList...Why?
for example...
public interface Interface extends java.rmi.Remote
public ArrayList getSomething(String ID) throws java.rmi.RemoteException;
Why is this not acceptable?

Java Interface does not accept method that passes ArrayList...Why?for example...
ALSO:
You are not 'passing' ArrayList, you are returning it.
If you are 'passing' anything, it is String.
~David

Accessing java Interface

Hi.
Sorry for my bad english.
I'm in trouble.
I have became a complet HttpServer with a simple servlet.
My servlet doesn't contains all of the functions, what I
MUST to use.
I have to use a givven Java Interface, to communicate via rmi
between to java servers. There are givven java classes.
I can execute a server, which creates some object.
I'm interested to use these methods, or the interface.
Somebody knows, how should i to try to do this?
(I can create the JVM,
I can access a class, but not a class of this projekt. classpath seems to be correct. How Can I use a Java Interface via JNI?)
Thanks:
Peter([email protected])

post your error messages so we can see what java is telling you.

Java interfaces as c++ controls?

Similar Messages

Maybe you are looking for