How can i call a c++ function through java

Hi,
dose anyone knows how to call a C++ function in java?
Thanks.

see JNI...
basically declare a native method in your java class, then run javah on the class thus generating a *.h file. Then implement the c/c++ function. Compile the c/c++ part as a shared library, and make sure its accessible from your LD_LIBRARY_PATH env variable.
Go through the steps in the JNI docs, and things shoulde be fine... hopefully ;)

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How can I call a public function in one component from another component?

I have two components: Form and Confirmation. Form is a Canvas and Confirmation is a TitleWindow.
Form contains several controls and a submit button. Confirmation contains an OK button. When the user clicks the submit button, the Confirmation appears over the Form (Form is blurred). When the user clicks the OK button on the Confirmation, I want to run a function on Form to set some default values in the controls.
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Here is the source
CustomForm.mxml
<?xml version="1.0" encoding="utf-8"?>
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<![CDATA[
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]]>
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CustomTitle.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow xmlns:mx="http://www.adobe.com/2006/mxml"
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backgroundAlpha="1"
color="#173553" backgroundColor="#EEEEEE"
headerColors="#FFFFFF, #CBCCCC"
borderColor="#666666" borderStyle="solid">
<mx:Script>
<![CDATA[
import mx.managers.PopUpManager;
public var callBack: Function = new Function();
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]]>
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xmlns="*"
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How can I call a static function in another static function?

/** = d, as a String, using exactly 5 characters.
Precondition: 0 <= d <= 999.
The truncated d will have one of the forms: ddd.d, dd.dd, and d.ddd.
Examples are: 360.1, 29.50, 4.003, 0.001, and 0.000
public static String truncateTo5(double d) {
// To get the desired output, do the following
// 1. If d < 0.001, set d to 0.
// This prevents d appearing in scientific notation, e.g. 1.5E-6.
// 2. Convert d to a string s, in the usual way.
// s is guaranteed to have a decimal point in it a digit before
// and after the decimal point.
// 3. Append zeros to s (if necessary) until s has 5 digits.
// 4. Return s.
String s= "" + d;
if (d < 0.001) {
d= 0;
return "0.000";
if (s.length() > 5) {
return s.substring(0,5);
if (s.length() == 3) {
int l= s.length();
return s.substring(0, l) + "00";
if (s.length() == 4) {
int l= s.length();
return s.substring(0, l) + "0";
return s;
/** = d, but rounded (if necessary) to its first 5 characters.
PreconditionL 0 <= d <= 360.
E.g. round 1.3546 to 1.355. round 1.3544 to 1.354.
E.g. round 21.995 to 22.00. round 21.994 to 21.99.
E.g. round 130.59 to 130.6. round 130.54 to 120.54.
public static String roundTo5(double d) {
// Hint. Rounding to an integer j is usually done by
// truncating the value j + 0.5.
// E.g. Change 10.6 to 11.1 and truncate to 11
// E.g. Change 10.4 to 10.9 and truncate to 10
// You need to do this sort of thing, but what you add may depend
// on how big d is.
What I need to do is call the truncateTo5() in the roundTo5() in order for this to work properly but I dont know how. Can someone help?

@captfoss: If they're static methods in the same class, you don't even need to do that. You can just call the method unquallified.
@OP: First off, when you paste code, wrap it in code tags. You can find them between Quote and Help.
As for your error, you have defined truncateTo5() to take a double as an argument. When you call it, you are not passing it a double and you get that error.

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use:
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writeBtn2.addEventListener (MouseEvent.CLICK,writeFile1);
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Can I call a C function from Java (using JNI) ??

hello,
I need to call one C function from remote device and get its return value(o/p) (for my application it is device SSID ) and display in the client PC.
Is it possible in java without using SNMP connction?.
please give me idea about it.
I need this information as soon as possible.
Thank you.

see JNI...
basically declare a native method in your java class, then run javah on the class thus generating a *.h file. Then implement the c/c++ function. Compile the c/c++ part as a shared library, and make sure its accessible from your LD_LIBRARY_PATH env variable.
Go through the steps in the JNI docs, and things shoulde be fine... hopefully ;)

RE: How can I call Windows .DLL components in Java

Hi, there,
I have a wondows dll component registered on my server. I want to call this componet in my Java application(Servlet). Could you tell me the syntex or is this possible to do in this way?
TIA,
Xin

Thank you for your reply. Did you suggest using JNI? Since this DLL is a comercial component and we can not recompile or modify it, I donot know how to use it. Could you give me some more detail ?
Thank you,
Xin
You can use either of the load or loadLibrary methods
in java.lang.System. The library has to be loaded at
the very beginning of loading of the class , if the
class were to access any native method in the
library.
Hence, it shoud be in a static block.
Syntax-
static {
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How can I call a Jscript function from XML, which is written seperatly outside the xml file

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I have made a SharePoint ribbon button which should display an alert message with SharePoint custom list
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It is a farm SharePoint solution I have kept the Jscript file in mapped folder named "Layouts"
It is showing the error as : JavaScript runtime error: The value of the property 'myFunction' is null or undefined, not a Function object
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is so...not able to debug JScript or xml using Visual Studio that makes my effort tedious!!!
Code:
Elements.xml
<CommandUIHandlers>
<CommandUIHandler Command="ShowAlert" CommandAction="javascript:retrieveListItems()" EnabledScript="return true;"/>
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<CustomAction Id="Ribbon.Library.Actions.Scripts" Location ="ScriptLink" ScriptSrc="/_layouts/RibAlert.js"/>
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<script>
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Hi,
I suggest you write an alert() in your function to check whether it can be executed first.
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http://www.c-sharpcorner.com/uploadfile/anavijai/how-to-create-custom-button-in-sharepoint-2010-ribbon-user-interface/
https://pholpar.wordpress.com/tag/custom-actions/
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Thanks
Patrick Liang
TechNet Community Support

How can I call a hsqldb procedure from Java

Hello,
I am trying to call from Java a stored procedure but I keep having exceptions!!!
In addition, I have no idea how I can get the result of the procedure !!!!
I have spent the whole day in Internet.... no luck!!
===============================================
I[b] java.lang.Exception: +updatejava.sql.SQLException: Unexpected token: # in statement [ call MODIFY_FIELD_SEPARATOR(#) ]
     at util.UtilBean.test_upd(UtilBean.java:369)
===============================================
The following procedures have been created and tested withing the database and there work.
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The alias have been created:
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CREATE ALIAS MODIFY_REFRESH_INTERVAL FOR "com.lucent.util.StoredProcedures.manage_frefresh_interval
My file.java contains the flollowing:
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      Statement stmt=null;
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Could you help me please?
THanks a lot!

Thanks for your quick response.
I need to construct the name of the procedure on the fly because I don't know the name of the table I need to modify until excecution time.
I have modified the code the following way but it still does not work!!!
I still get the exception:
java.lang.Exception: +updatejava.sql.SQLException: Unexpected token CALL, requires SELECT in statement [(call MODIFY_FIELD_SEPARATOR(?)}]
     at util.UtilBean.test_upd(UtilBean.java:380)
public String test_upd(String tableName, String paramValue)
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Let me get this clear. Basically what u want to do is to just call a URL, right?
U can do it by using the following code:
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import java.net.*;
import java.io.*;
public class testhttp
public static void main(String[] args)
try
URL url = new URL ("http://../testcgi.cfm");
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(HttpURLConnection)url.openConnection();
cxn.setRequestMethod("POST");
cxn.setUseCaches(false);
cxn.setDoOutput(true);
cxn.setDoInput(true);
ByteArrayOutputStream bytes = new
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writer.flush();
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cxn.setRequestProperty("Content-
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bytes.writeTo(cxn.getOutputStream());
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String currentLine;
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There is also a library called HTTP client which can be found at:
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How can we call actionscript functions from js

hi
how can we call Action script function from js file . i
tried ExternalInterface. add Callback() .but it throws an error .is
there any other chance to call action script method .thnx in
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angadala,
some people have found it is good to include the full
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flash.external.ExternalInterface.addCallback("ext_method_name",int_method_name);
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There are also browser differences which affect how you find
the Flex application object which are documented at
http://www.adobe.com/livedocs/flex/3/html/help.html?content=passingarguments_5.html
Richard

How can i call the Buttons which made in flash

Sir
i design some Flash buttons but it is save as .swf extension
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effects.
sir
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of course, anything's possible, but to do this means first getting a bridge from flash to javascript or com or something, and then a bridge from javascript to Java. So in short,
It's not possible.

How can i call a c++ function through java

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