Flex call Java method/objects?

Hi guys,
I have a Flex application embedded in a Java Swing application.
Can I call Java methods or objects from the Flex application?
How to?
Thanks in advance!
Sha Jiang

You register your java class as a bean and put an actionlistener or an action method on the button binding it to the bean.
Did you check out the tutorial section [http://www.oracle.com/technology/products/jdev/11/cuecards/index.html|http://www.oracle.com/technology/products/jdev/11/cuecards/index.html] ?
There is other useful stuff on the jdev home page.
One simple way is to select the button in the jspx file, open the property inspector, click the small triangle on the left to actionlistener. In the dialog appearing you hit new by managed bean and give it all information and new by the method name and enter a method name to call. The new method will be created in the bean class for you. From this method you call your custom method.
Timo

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Calling Java Methods from Stored Procedures

Can I call Java Methods from Oracle Stored Procedures? I have a Java framework that logs events and would like to reuse it for logging events that occur in stored procedures.
null

You need to publish java class methods to plsql.
Attached below is some information.
Although both PL/SQL modules and Java classes are stored in the database
and are managed by many of the same mechanisms, each of them resides in
its own namespace. Therefore, Java methods are not accessible from SQL
and PL/SQL by default. In order to expose Java methods to the SQL and
PL/SQL engines, first publish that Java method to the SQL namespace using
a 'Call Spec'.
Note: A 'Call Spec' does not create an additional layer of
execution so there is no performance penalty incurred.
A 'Call Spec' is simply a syntactical mechanism used to
make a method known in the SQL namespace.
The SQL name established by the 'Call Spec' can be top-level or packaged.
The syntax differs only slightly and is consistent with that used for
PL/SQL procedures and packages. For more information on the exact
syntax, see the references listed in 'Related Topics'.
In general, a top-level procedure 'Call Spec' takes the form:
CREATE OR REPLACE PROCEDURE procname ( pname mode ptype, ... )
AS LANGUAGE JAVA NAME 'javaname ( javatype, ... )';
Where: procname is the SQL name you wish to publish
pname is the name for a parameter to procname
mode is the parameter mode (i.e. IN, OUT, IN OUT)
ptype is a valid SQL type (e.g. NUMBER, CHAR, etc.)
javaname is the fully qualified name of the Java method
javatype is a Java type for the corresponding parameter
Likewise, a top-level function 'Call Spec' takes the form:
CREATE OR REPLACE FUNCTION fname ( pname mode ptype, ... ) RETURN rtype
AS LANGUAGE JAVA NAME 'javaname ( javatype, ... ) return javatype';
Where: fname is the SQL name you wish to publish
rtype is the SQL return type of the function
Note: Within the NAME clause, everything within quotes is case
sensitive. For example, if the keyword 'return' is in all
CAPS, this Call Spec will not compile.
Other optional parts of this syntax have been omitted here for simplicity.
Additional examples in subsequent sections illustrate some of these options.
eg
CREATE PROCEDURE MyProc (rowcnt IN NUMBER, numrows OUT NUMBER)
AS LANGUAGE JAVA NAME 'MyClass.MyMethod(int, int[])';
There are several important things to note here:
1.) The 'Call Spec' for a JSP must be created in the same schema as the
corresponding Java class that implements that method.
2.) IN parameters are passed by value. This is the only parameter mode
available in Java. OUT parameters, therefore, must be passed as single
element arrays in order to emulate pass by reference.
3.) Parameter names do not need to match, but the number and types of
the parameters must match (with just one exception - see item 5 below).
Oracle 8i supports conversions between an assortment of SQL and Java.
See the references listed in 'Related Topics' for additional information.
4.) Primitive types (e.g. int, float, etc.) are not required to be fully
qualified with any package name. However, standard Java object types
(e.g. String, Integer, etc.) as well as any user defined object types
(e.g. like those generated by JPublisher) must be prefixed with a
corresponding package name (e.g. java.lang) if applicable.
5.) The 'main' method which takes a single String[] parameter can be
mapped to any PL/SQL procedure or function which takes some number
of VARCHAR2 or CHAR type IN parameters. For example, the java method:
public static void main ( String[] args ) { ... }
can be mapped to each of the following:
PROCEDURE MyProc2 ( arg1 IN CHAR ) ...
PROCEDURE MyProc3 ( arg1 IN CHAR, arg2 IN VARCHAR2 ) ...
PROCEDURE MyProc4 ( arg1 IN VARCHAR2, arg2 IN VARCHAR2 ) ...
and so forth. Parameters map to the corresponding element of the String
array (e.g. arg1 -> args[0], arg2 -> args[1], etc.).
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Any way (event) to call Java method after view created in JSF 2.0

Hi,
I am using JSF 2.0 Mojarra's implementation.
I am interested to know if there is a way to call Java methods before and/or after view has been restored.
I wanted to initialize data for my page in this Java method.
I could see there is an event class PostRestoreStateEvent added in JSF 2.0. How to use it?
I tired to use f:event element as below, but it does not work. Can anyone share anyother idea to achieve this behaviour?
<f:metadata>
<f:event type="postRestoreState" listener="#{employeeLoadBean.loadAfterRestoreView}"/>
</f:metadata>
Regards,
Kishore K S

Hi,
The problem is solved as below.
<f:metadata>
<f:event type="javax.faces.event.PostRestoreStateEvent" listener="#{employeeViewEventListener.postRestoreState}"/>
</f:metadata>
The above calls the Java method #{employeeViewEventListener.postRestoreState} whenever View has been restored.
It was not working when shortName of the event (ie., postRestoreState) is given and throwing ClassNotFound exception.
Regards,
Kishore K S

How to call Java methods from a Windows application?

Hello all,
At our company, we need to integrate our product which is a Java Swing application with a Windows application. Specifically, we are trying to call Java methods that reside in our application from the Lotus Notes email client application, which is a native Windows application. Such that when a user clicks a button in the Lotus Notes email client, it will trigger an event in our Swing application. Is this possible using JNI? Do you know of any resources or references relating to this kind of a project?
Thanks,
Mete Kural

If there is some dll interface that lets Lotus Notes load up and use a DLL, then yes, this should be possible.

How to call Java method from XSLT??

Hi All,
Jdev 11.1.1.3.0
I have a requirement to implement that, I have to call Java method from XSLT. Could anyone please suggest to implement that??
Thanks,
Santosh M E

As pointed by others, you must expose your method as a custom function, registering with JDeveloper (for development time) as well as with SOA Suite (for runtime).
In the link below you will find a simple step by step example:
https://blogs.oracle.com/reynolds/entry/building_your_own_path
Regards,
Luis F. Heckler

How to call java method from workflow script?

Hi
I have a requirement of updating field value 'Document Status' based on review/approve of content from Workflow and hence need to update the version number. For that I need to call my java method from workflow during submit of review/approve condition. Please let me know how to call java method from workflow?
Is there any alternative better way to achive this requirement from workflow? Please suggest.
Thanks,
Sarang

OK. So, I think we can all conclude that you don't need to call any Java method, can't we? And, that wfUpdateMetadata is the command that will update your metadata.
Now, the question is what are its arguments. It has two - the first is the name of a custom metadata field to be updated (let's suppose that one field is called xMinorVersion, and the other xMajorVersion), the other is the new value, e.g. <$wfUpdateMetaData("xMinorVersion", "New value.")$>As for new value - do you insist on using strings? Since you want to increase the value, it would be more convenient to work with numbers. For instance, with integers you could go with <$wfUpdateMetaData("xMinorVersion", xMinorVersion + 1)$>With strings you will need to convert it to numbers and back to strings. Besides, what happens if you have more than 100 minor versions? (you mentioned you want to add 0.01, but that would finally increase the major version, wouldn't it?) So, I think these two numbers are independent (perhaps, with exception that increase on the major version set the minor version to .00).
If you want to present it, you can use profiles that will construct for you the representation 2.304 out of MajorVersion = 2, MinorVersion = 304
Solved?

How we can call java methods in ODI?

Hi
i have java jars.i would like to call java methods from ODI
how it is possible in ODI?
plz help me regards the same
thanks

Hi
i tried according to given contents in this link
but in my systen i am getting error
could y plz help me regards solving this error
error is :
org.apache.bsf.BSFException: exception from Jython:
Traceback (innermost last):
File "<string>", line 1, in ?
java.lang.UnsupportedClassVersionError: FileWrite (Unsupported major.minor version 50.0)
     at java.lang.ClassLoader.defineClass0(Native Method)
     at java.lang.ClassLoader.defineClass(Unknown Source)
     at java.security.SecureClassLoader.defineClass(Unknown Source)
     at java.net.URLClassLoader.defineClass(Unknown Source)
     at java.net.URLClassLoader.access$100(Unknown Source)
     at java.net.URLClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClassInternal(Unknown Source)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Unknown Source)
     at org.python.core.SyspathJavaLoader.loadClass(SyspathJavaLoader.java)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at org.python.core.Py.findClassEx(Py.java)
     at org.python.core.SysPackageManager.findClass(SysPackageManager.java)
     at org.python.core.PackageManager.findClass(PackageManager.java)
     at org.python.core.SysPackageManager.findClass(SysPackageManager.java)
     at org.python.core.PyJavaPackage.__findattr__(PyJavaPackage.java)
     at org.python.core.PackageManager.lookupName(PackageManager.java)
     at org.python.core.imp.load(imp.java)
     at org.python.core.imp.import_next(imp.java)
     at org.python.core.imp.import_name(imp.java)
     at org.python.core.imp.importName(imp.java)
     at org.python.core.ImportFunction.load(__builtin__.java)
     at org.python.core.ImportFunction.__call__(__builtin__.java)
     at org.python.core.PyObject.__call__(PyObject.java)
     at org.python.core.__builtin__.__import__(__builtin__.java)
     at org.python.core.imp.importOne(imp.java)
     at org.python.pycode._pyx0.f$0(<string>:1)
     at org.python.pycode._pyx0.call_function(<string>)
     at org.python.core.PyTableCode.call(PyTableCode.java)
     at org.python.core.PyCode.call(PyCode.java)
     at org.python.core.Py.runCode(Py.java)
     at org.python.core.Py.exec(Py.java)
     at org.python.util.PythonInterpreter.exec(PythonInterpreter.java)
     at org.apache.bsf.engines.jython.JythonEngine.exec(JythonEngine.java:144)
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     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.scripting(SnpSessTaskSql.java)
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     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.execScriptingOrders(SnpSessTaskSql.java)
     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.treatTaskTrt(SnpSessTaskSql.java)
     at com.sunopsis.dwg.dbobj.SnpSessTaskSqlS.treatTaskTrt(SnpSessTaskSqlS.java)
     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.treatTask(SnpSessTaskSql.java)
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     at com.sunopsis.dwg.dbobj.SnpSession.treatSession(SnpSession.java)
     at com.sunopsis.dwg.cmd.DwgCommandSession.treatCommand(DwgCommandSession.java)
     at com.sunopsis.dwg.cmd.DwgCommandBase.execute(DwgCommandBase.java)
     at com.sunopsis.dwg.cmd.e.i(e.java)
     at com.sunopsis.dwg.cmd.g.y(g.java)
     at com.sunopsis.dwg.cmd.e.run(e.java)
     at java.lang.Thread.run(Unknown Source)
java.lang.UnsupportedClassVersionError: java.lang.UnsupportedClassVersionError: FileWrite (Unsupported major.minor version 50.0)
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     at com.sunopsis.dwg.codeinterpretor.k.a(k.java)
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     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.execScriptingOrders(SnpSessTaskSql.java)
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     at com.sunopsis.dwg.dbobj.SnpSessTaskSql.treatTask(SnpSessTaskSql.java)
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How to call java method from C ?

Hello,
I try to call a native method from java which calls java method from the same class. Exception (noSuchMethodError) is thrown. Any ideas?
Thanx in advance !
here is the source of the native method :
JNIEXPORT jint JNICALL Java_TestDll_Proc_1Mul_1Int_1Var_1Var_1Stdcall (JNIEnv * env, jclass jcl, jint jarg1, jint jarg2) {
int arg1;
int arg2;
int arg3;
jint res;
char * ch = "test";
jfieldID fid;
jmethodID mid;
int (* procedure) (int *, int * ,int *);
int mch;
arg1 = (int )jarg1;
arg2 = (int )jarg2;
procedure = GetProcAddress(libraryHandle,"Proc_Mul_Int_Var_Var_Stdcall");
procedure(&arg1,&arg2,&arg3);
res = (jint) arg3;
printf("(*env)->GetMethodID(env, jcl, \"test\", \"()V\");\n");
mid = (*env)->GetMethodID(env, jcl, "test", "()V");
printf("(*env)->CallVoidMethod(env, jcl, mid);\n");
(*env)->CallVoidMethod(env, jcl, mid);
return res;
here is the source of the java file:
public class TestDll {
static {
System.loadLibrary("testdllwrap");
System.out.println("java: Library testdllwrap.dll loaded");
public TestDll() {
public native int Proc_Mul_Int_Var_Var_Stdcall(int jarg1, int jarg2);
public void test() {
System.out.println("java: test()");
public static void main(String[] args) {
TestDll access = new TestDll();
int a = 5;
int b = 6;
int c = 0;
System.out.println("Calling Proc_Mul_Int_Var_Var_Stdcall");
c = access.Proc_Mul_Int_Var_Var_Stdcall(a,b);
System.out.println("Java Result = " + c);

Something is wrong with the code you posted here.
Since your native method is not static, it should have the jobject instance as a parameter in the function prototype, not a jclass. Also, you should be calling CallObjectMethod with a jobject, not jclass.
Check out Jace at http://jace.reyelts.com/jace.
To call the java method you would do:
JNIEXPORT jint JNICALL Java_TestDll_Proc_1Mul_1Int_1Var_1Var_1Stdcall
(JNIEnv * env, jobject jTestDll, jint jarg1, jint jarg2) {
TestDll testDll( jTestDll );
testDll.test();
}God bless,
-Toby Reyelts

How to call java method having array as argument from c++ ?

Hello sir,
how to call java method having array as arguments from c++;
here is java code which is called from c++
class PQR {
     public void xyz(int[] ia) {
     System.out.println("hi");
          for (int i = 0; i < ia.length; i++)
               System.out.println(ia);
suppose all jvm invocation is done...

For someone well versed in java, C++ and JNI although tedious that should be obvious.
For someone not well versed in all three it is going to be very difficult.
Even for someone that does have knowledge in all of those areas coming up with a C++ interface that reflects that functionality in a dynamic way such that anyone is will to use it is going to be quite an adventure.
At any rate to start building it you do exactly the same thing that you would in java.
1. Extract everything in the jar via the zip package
2. For each found instance extract all of the methods, return types, parameters, etc and build a description tree for each class.
Doing all of that in C++ is going to take a LOT of code. If someone wanted an estimate from me it would take me 6 months to do it. And before I would even attempt it I would get them to explain to me in detail exactly how they thought they were going to use it when I was done because I can't see any reasonable way to do that.
I left out the description tree itself. I suppose you could duplicate the entire reflection api in C++.
Now perhaps if it was much, much more constrained, like to only those classes that implement a single interface then that would be more reasonable.

How to call java method using jsp

how to call java method using jsp.....
anyone can help me.....i having problem here...coz i very new in java and jsp.....
thanks.....

keep an eye on this person's thread...they have code there and everything.
http://forum.java.sun.com/thread.jspa?threadID=777263&tstart=0

How to call java method on page load?

How to call java method on page load?
Thanks

Hey Dan,
Well, if you want to execute a java method when page is load, you need to put the clientlistener in af:document. Let me to show you an example (I can't find my post :P),
JSPX page:
<f:view>
<af:document>
<f:verbatim>
<script>
    function loadPage(event) {
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</script>
</f:verbatim>
<af:clientListener method="loadPage" type="load"/>
</af:document>
</f:view>If you try this code you can see that when the page has been load, you recieve the alert "Hello World!".
Furthermore, this is the javascript AJAX function that let you to call a servlet:
function ajaxFunction () {
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        httpRequest = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
        httpRequest.overrideMimeType('text/xml');
    httpRequest.onreadystatechange = function() { alertContents(httpRequest); };
    httpRequest.open('GET', '/appname/servletname', false);
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function alertContents(httpRequest) {
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}Where 'appname' is your application name and 'servletname' is the name of the servlet that you want to call. Obviously, you can call any URL ;)
JVN

Notable to call java method from xslt

Hi All,
We are not able to call java methods that return org.w3c.dom.NodeList.
All other methods invocation are working fine but process errors out when we try to call a method that returns org.w3c.dom.NodeList.
Any help is highly appiciated.
Vigni

As pointed by others, you must expose your method as a custom function, registering with JDeveloper (for development time) as well as with SOA Suite (for runtime).
In the link below you will find a simple step by step example:
https://blogs.oracle.com/reynolds/entry/building_your_own_path
Regards,
Luis F. Heckler

How to call Java method from SAPUI5 applications?

Hi Experts,
Please give me information that how can I call Java method or jars from SAPUI5 applications?
Thanks,
Nag

Hello Nag,
why do open this thread in BRM Space? I would suggest reopen this in "UI Development Toolkit for HTML5 Developer Center" Space.
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Call Java Method From JavaScript Function

hi everyone
i need a help in calling Java method from a javaScript method
ex:
function confirmAddRecord() {
cHours =document.getElementById('frmP:ChargeHours').value;
cSTime =document.getElementById('frmP:ChargeStartTime').value;
var answer = confirm("Are you sure you want to add Record?")
if (answer){
here i want to call the Java Method that is located in session bean that takes the upper params cHours & cSTime
else{
return false;
i know i can do it as an action button but it is required me to be in that way can any one help plz
Message was edited by:
casper77

That depends on the nature of your parameters. I guess you calculate the params on client and then want to submit them. In this case and if you don't want to use Ajax simple add some <input type="hidden"> elements (of course there correspondend components dependent of your framework) and store the params there. If the javascript isn't invoked by a button click, you can use a button nevertheless. Set visible="false" and call
document.getElementById('client_id_of_my_hidden_button').click();
(or maybe doClick() dependent on your framework).

Calling Java methods from C program

After a year or so using these excellent forums to answer my queries, without ever having to post a question, I've finally had to ask for help with this one. I've already looked through the JNI tutorial, and these forums, extensively, but I'm still not quite sure of how best to solve my problem.
I need to call Java methods from a C program. I've already used JNI to call a simple C program from Java, and that's fine, but I just can't determine exactly what I need to do for the reverse to work.
What is the definitive solution for calling Java from C? Is it to use the invocation APIs to create a JVM, and then access it through the various GetMethod, FindClass methods? Or can I 'reverse engineer' the process I followed to get Java to call C?? The tutorial is a bit confusing, as the example it gives uses Callback stuff, but I guess that's only useful when you want to go Java-C-Java??
Advice appreciated,
Rich

Forgive my blatant bumping, but anyone, please?

Flex call Java method/objects?

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