Calling javascript method from java

Hi this is sri,
I have one doubt on Java Applets "how to call the javascript method from java Applet".Can u give me the complete sample code for one program(both java applet file and html file also)because i can easily understand the programming flow.
Thanks ,
Srilekha.

It's an extremely important skill to learn how to search the web. Not only will it increase your research and development talents, it will also save you from asking questions that have already been answered numerous times before. By doing a little research before you ask a question, you'll show that you're willing to work and learn without needing to have your hand held the entire time; a quality that is seemingly rare but much appreciated by the volunteers who are willing to help you.
If you've done the research, found nothing useful, and decide to post your question, it's a great idea to tell us that you've already searched (and what methodologies you used to do your research). That way, we don't refer you back to something you've already seen.
To get you started, here's a link...
http://www.google.com/search?q=call+java+from+javascript

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Call Javascript methods from Java methods

Dear All,
I have a requirement where I need to invoke Javascript methods from a Java file located in the same machine. Are there any possible solutions for this?
Regards,
Alok

Hi,
Thanks for all your replies. Does this work on Java 5 too? Could you please share the complete code snippet which makes it work? I tried working on yours but no success.
Regards,
Alok

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---->
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JNIEXPORT void JNICALL Java_JavaClass_nativeMethod(JNIEnv *env
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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.)

ADF: Can i call javascript function from java clsss method in ADF?

Hi,
I want to call javascript function in Java class method, is it possible in ADF? , if yes then how?
or I need to use Java 6 feature directely?
Regards,
Deepak

private void writeJavaScriptToClient(String script)
FacesContext fctx = FacesContext.getCurrentInstance();
ExtendedRenderKitService erks = Service.getRenderKitService(fctx, ExtendedRenderKitService.class);
erks.addScript(fctx, script);
}usage
StringBuilder script = new StringBuilder();
script.append( "var popup = AdfPage.PAGE.findComponentByAbsoluteId('p1');");
script.append("if(popup != null){"); script.append("popup.show();"); script.append("}");
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Call JavaScript-Method from Command in NW04s WebApplication

Hi,
I would like to use a command to call a JavaScipt-method. Is that possible?
I want to use a JavaScript generated from the following command as an ACTION_BEFORE_RENDERING-event.
<bi:TEMPLATE_PARAMETERS name="TEMPLATE_PARAMETERS" >
<bi:WEB_TEMPLATE_ACTIONS type="COMPOSITE" >
    <bi:ACTION_BEFORE_RENDERING type="COMPOSITE" >
      <bi:INSTRUCTION >
        <bi:SET_ITEM_PARAMETERS >
          <bi:cmd_item_parameters type="TEMPLATE_INCLUDE_ITEM" >
            <bi:TEMPLATE value="AIS_ANZEIGE_BETRIEB_NW_04" text="Stammdatenanzeige für Betrieb NW 04" />
          </bi:cmd_item_parameters>
          <bi:TARGET_ITEM_REF value="TEMPLATE_INCLUDE_ITEM_2" />
        </bi:SET_ITEM_PARAMETERS>
        <bi:SET_SELECTION_STATE_SIMPLE >
          <bi:TARGET_DATA_PROVIDER_REF_LIST type="ORDEREDLIST" >
            <bi:TARGET_DATA_PROVIDER_REF index="1" value="DP_2" />
          </bi:TARGET_DATA_PROVIDER_REF_LIST>
          <bi:CHARACTERISTIC value="AISIS003___F00069" text="" />
          <bi:RANGE_SELECTION_OPERATOR type="CHOICE" value="EQUAL_SELECTION" >
            <bi:EQUAL_SELECTION type="CHOICE" value="MEMBER_NAME" >
              <bi:MEMBER_NAME value="17630775" />
            </bi:EQUAL_SELECTION>
          </bi:RANGE_SELECTION_OPERATOR>
        </bi:SET_SELECTION_STATE_SIMPLE>
      </bi:INSTRUCTION>
    </bi:ACTION_BEFORE_RENDERING>
</bi:WEB_TEMPLATE_ACTIONS>
</bi:TEMPLATE_PARAMETERS>
I want to assign a new WebTemplate to an included WebTemplate and also assign a filter value to the new loaded DataProvider.
It works as a command, but I only want the new WebTemplate to be loaded, if the corresponding filter is set. Otherwise I want to load a different WebTemplate. I think I have to use JavaScript here, but I don't know how to link that to the ACTION_BEFORE_RENDERING-event.
Any ideas?
Thanks in advance.
Denis

Sorry, Javascript is not Java and for sure not JSF.
Repost the question at a forum devoted to Javascript.
There are ones at [webdeveloper.com|http://www.webdeveloper.com] and [dynamicdrive.com|http://www.dynamicdrive.com].
I can give you at most one hint: [DOM reference|https://developer.mozilla.org/en/DOM].
Good luck.

How call javascript method from parent window to iframe

hi....
i need to call javascript a method which located in iframe..
in my java script file i used like this.
window.frames[0].getHtml();
it will working in IE but mozilla is not supporting
pls help me..
thanks
Edited by: fsfsfsdfs on Nov 7, 2008 1:02 AM

Sorry, Javascript is not Java and for sure not JSF.
Repost the question at a forum devoted to Javascript.
There are ones at [webdeveloper.com|http://www.webdeveloper.com] and [dynamicdrive.com|http://www.dynamicdrive.com].
I can give you at most one hint: [DOM reference|https://developer.mozilla.org/en/DOM].
Good luck.

Calling C++ method from Java program on Linux

I'm trying to get set up to call a C++ method from a Java app on a SUSE Linux box. I follow the steps of the "Hello World" baby example in Beth Stearns's tutorial, "Integrating Native Code and Java Programs", but I get the following error message:
Exception in thread "main" java.lang.UnsatisfiedLinkError: /users/dmizell/testIF/libhello.so: /users/dmizell/testIF/libhello.so: invalid ELF header (Possible cause: endianness mismatch)
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1778)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1703)
at java.lang.Runtime.loadLibrary0(Runtime.java:823)
at java.lang.System.loadLibrary(System.java:1028)
at HelloWorld.<clinit>(HW.java:7)
at Main.main(Main.java:5)
Any idea what I might be doing wrong?
thanks
David

Your library is compiled in a way which is incompatible with the VM you are using.
Note that there is a JNI forum.

Calling c method from java

Hi,
I am new to JNI. I want to call a C function from java, where my C function name is
UINT8 abc(UINT8 feature, UINT8* in_value, UINT32 serialNo, UINT8 * out_value)
where,
typedef unsigned char UINT8;
typedef unsigned int UINT32;
My question is what should be the prototype defination in java and what has to be changed in C code to make it work?

After adding the native keyword to your Java method, compile with javac and run javah on the class name. For example:
package my.stuff;
public class MyClass
   public native void myMethod(char param1, int param2);
}javac ./my/stuff/MyClass.java
javah my.stuff.MyClass
This generates my_stuff_MyClass.h, which has the function prototype for your method. Inside the implementation of the function, you can call your C function.
Here is the contents for my_stuff_MyClass.h:
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class my_stuff_MyClass */
#ifndef _Included_my_stuff_MyClass
#define _Included_my_stuff_MyClass
#ifdef __cplusplus
extern "C" {
#endif
* Class:     my_stuff_MyClass
* Method:    myMethod
* Signature: (CI)V
JNIEXPORT void JNICALL Java_my_stuff_MyClass_myMethod
(JNIEnv *, jobject, jchar, jint);
#ifdef __cplusplus
#endif
#endif

Calling JavaScript functions from Java

Hi,
I am trying to call the javascript function alert("text message") from a section of Java code.
I want to do something like below....
if (balh blah blah...){
isFound = false;
alert("Record already exists");
Dose anyone know how to do this?

If your Java code is in a JSP page or a Servlet, then yes, but not exactly...
Since the Java portion of a JSP / Servlet is executed on the server side, there is no way to instantaneously pop up something to the user per se - the code is executed on the server before the output is transmitted to the browser.
What you could do, however, is to have a JavaScript function defined in your page which would perform the alert:
<script language="JavaScript">
function userAlert(message){
    alert(message);
</script>Then, on the jsp/servlet side, you could perform your if/else check:
String bodyTag = "<body>";
String userMessage = null;
if (balh blah blah...){
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   userMessage = "Record already exists";
   bodyTage = "<body onLoad=\"userAlert('" + userMessage + "')>\"";
}This way, as soon as the browser loads the page, it alerts the user with your message.
Hope this helped,
-Scott

Calling c method from java with jniwrapper

Hello
Does anyone have any good example or links to j�niwrapper method.
I have checked documentation www.jniwrapper.com. However i think I would need a clear example or example code on how to call an c function from javaprogram.
Please help!
Regards Land�

Does jniwrapper work with MIDP 2 on the devices that have kvm..?

How to call backing bean method from java script

Hi,
I would like to know how to call backing bean method from java script.
I am aware of serverListener and [AjaxAutoSuggest article|http://www.oracle.com/technology/products/jdev/tips/mills/AjaxAutoSuggest/AjaxAutoSuggest.html]
but i am running in to some issues with [AjaxAutoSuggest article|http://www.oracle.com/technology/products/jdev/tips/mills/AjaxAutoSuggest/AjaxAutoSuggest.html]
regarding which i asked for help in other thread with subject ....Question on AjaxAutoSuggest article (Ajax Transactions Using ADF and J...)
The reason why i posted is ( though i realise both are duplicates) .. that threads looks as a specific question to that article hence i would like to ask the quantified problem is asked in this thread.
So could any please letme know how to call backing bean method from java script
Thanks
Murali
Edited by: mchepuri on Oct 24, 2009 6:17 PM
Edited by: mchepuri on Oct 24, 2009 6:20 PM

Hello,
May know how to submit a button autoamtically on onload of page with clicking a welcome alert box. the submit button has managed button too to show a message on console using SOP.
the problem is.
1. before loading the page a javascript comes on which i clicked ok
2. the page gets loaded and the button is there which gets automatically clicked and the managed bean associated with prints a message on console using SOP.
I m trying to do this through server listener and click listener. the code is(adf jspx page)
<?xml version='1.0' encoding='UTF-8'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.1"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:af="http://xmlns.oracle.com/adf/faces/rich">
<jsp:directive.page contentType="text/html;charset=UTF-8"/>
<f:view>
<af:document id="d1" binding="#{backingBeanScope.backing_check4.d1}">
<af:form id="f1" binding="#{backingBeanScope.backing_check4.f1}">
<af:commandButton text="commandButton 1"
binding="#{backingBeanScope.backing_check4.cb1}"
id="cb1" action="#{beanCheck4.submit1}"/>
<af:clientListener type="click" method="delRow"/>
<af:serverListener type= "jsServerListener"
method="#{backingBeanScope.backing_check4.submit1}"/>
<f:facet name="metaContainer">
<af:resource type ="javascript">
x=confirm("hi");
// if(x){
delRow = function(event){
AdfCustomEvent.queue(event.getSource(), "jsServerListener", {}, false);
return true;
</af:resource>
</f:facet>
</af:form>
</af:document>
</f:view>

</jsp:root>
the backing bean code is -----
public class classCheck4 {
public classCheck4() {
public String submit1() {
System.out.println("hello");
return null;
}

Call C# method from javascript in WebView and retrieve the return value

The issue I am facing is the following :
I want to call a C# method from the javascript in my WebView and get the result of this call in my javascript.
In an WPF Desktop application, it would not be an issue because a WebBrowser
(the equivalent of a webView) has a property ObjectForScripting to which we can assign a C# object containg the methods we want to call from the javascript.
In an Windows Store Application, it is slightly different because the WebView
only contains an event ScriptNotify to which we can subscribe like in the example below :
void MainPage_Loaded(object sender, RoutedEventArgs e)
this.webView.ScriptNotify += webView_ScriptNotify;
When the event ScriptNotify is raised by calling window.external.notify(parameter), the method webView_ScriptNotify is called with the parameter sent by the javascript :
function CallCSharp() {
var returnValue;
window.external.notify(parameter);
return returnValue;
private async void webView_ScriptNotify(object sender, NotifyEventArgs e)
var parameter = e.Value;
var result = DoSomerthing(parameter);
The issue is that the javascript only raise the event and doesn't wait for a return value or even for the end of the execution of webView_ScriptNotify().
A solution to this issue would be call a javascript function from the webView_ScriptNotify() to store the return value in a variable in the javascript and retrieve it after.
private async void webView_ScriptNotify(object sender, NotifyEventArgs e)
var parameter = e.Value;
var result = ReturnResult();
await this.webView.InvokeScriptAsync("CSharpCallResult", new string[] { result });
var result;
function CallCSharp() {
window.external.notify(parameter);
return result;
function CSharpCallResult(parameter){
result = parameter;
However this does not work correctly because the call to the CSharpResult function from the C# happens after the javascript has finished to execute the CallCSharp function. Indeed the
window.external.notify does not wait for the C# to finish to execute.
Do you have any solution to solve this issue ? It is quite strange that in a Window Store App it is not possible to get the return value of a call to a C# method from the javascript whereas it is not an issue in a WPF application.

I am not very familiar with the completion pattern and I could not find many things about it on Google, what is the principle? Unfortunately your solution of splitting my JS function does not work in my case. In my example my CallCSharp
function is called by another function which provides the parameter and needs the return value to directly use it. This function which called
CallCSharp will always execute before an InvokeScriptAsync call a second function. Furthermore, the content of my WebView is used in a cross platforms context so actually my
CallCSharp function more look like the code below.
function CallCSharp() {
if (isAndroid()) {
//mechanism to call C# method from js in Android
//return the result of call to C# method
} else if (isWindowsStoreApp()) {
window.external.notify(parameter);
// should return the result of call to C# method
} else {
In android, the mechanism in the webView allows to return the value of the call to a C# method, in a WPF application also. But I can't figure why for a Windows Store App we don't have this possibility.

Are DLL methods called as instance or static methods from Java ?

Hi,
I have only a small question.
When I call a C++ DLL method from Java using JNI, do I instantiate it like an object method or is it called as a static method ?
I am asking you this because I will use servlets (Java 1.2.2) to call a DLL. These servlets may run concurrently in any moment, and I pass some data to this DLL. I want to know if there is any possibility of this data becoming corrupt, because of one concurrent servlet rewriting the data another servlet has passed.
Thanks and regards.

The question is not specific enough.
Methods in C/C++ can be qualified with the following forms:
-global (C/C++)
-static member(C++ class method)
-instance member(C++ class method)
Since you didn't provide your code I couldn't possible determine which of the above you are using, but presumably you know.
On the other hand a java native method is either static or non-static depending on how you defined it in the class. Once again without the code there is no way to say and presumably you already know this.
The context of the methods is the same context that a similar servlet method has. But naturally in C/C++ is is easy to circumvent the context - for example by using a global variable.
Data in C/C++ can always become corrupt and in the vast (all?) cases it is because something is wrong in the C/C++ code. Like a pointer that is not initialized, or a pointer used after it is free'd. Or writing past the end of a buffer, or writing before the beginning of a buffer.

Calling OCX Methods from a Java Program

Hi All,
Is it possible to call OCX methods from a Java program? If yes, can you please refer me to any documents or sample code to achieve this.
All inputs are highly appreciated.
Thanks
Tarek

JNI
http://java.sun.com/docs/books/tutorial/native1.1/index.html

Calling a method from another class or accessing a component from another

Hi all
im trying to make a find/replace dialog box
my main application form has a jtextpane and when i open up the find and replace dialog box it has two textboxes (find and replace)
now i have the code to do the finding on my jtextpane but how do i call that code to do the find method?
I have tried having the code in my main application class but then how do i call that method from my dialog box class?
ive also tried having the code in my dialog box class, but then how to i tell it to work on my jtextpane which is in my main ap class?

well if someone had been nice enough to provide me
with a tutorial i wouldnt have gotten into this
muddle, no need to be rude is there!I'm not rude. And you also wouldn't have gotten into the muddle if you searched yourself. This site provides many very good tutorials about all kinds of stuff.
http://java.sun.com/docs/books/tutorial/java/javaOO/classes.htmlAmong other things, it mentions that "static" defines everything that belongs to a class, as opposed to an object.

Calling javascript method from java

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