Void interface
Hi,
I need to trigger a XI interface from R/3 (Abap Proxy) that will trigger a void Stored Procedure.
There is any way to do this?
ABAP Proxy -> XI Interface -> Stored Procedure
There are <b>no field</b> mapping between all parts.
Thanks.
Can you explain what a Void Stored procedure implies?
Is it a stored procedure with no Input parameters? If yes, sure is possible. Generate the a Proxy for your message interface and allow this to trigger the call to XI.The target data type will be the format of the Soted Proc without any input parameters and Action as EXECUTE.
Regards
Bhavesh
Similar Messages
-
Syntax error on keyword "void"; "interface", "class" expected
When migrating my application for Visual-Age to Web-Sphere 5.1
The following error occurred:
Syntax error on keyword "void"; "interface", "class" expected
for the code:
* ejbLoad method comment
* @exception javax.ejb.EJBException The exception description.
public void ejbLoad() throws javax.ejb.EJBException{
_initLinks();
}Thanking you in an advanceI had missed a closing breacket '}'
-
Hello everyone,
I have an arraylist mishap that I can't spot, and at this point I need a second pair of eyes. The offending class "Places" compiles, as do the other classes that include the main method (that's MedievalQuestGame1) and The Wilderness Class. However, when I run the program, calling the GoToPlace() method in Places, an exception is thrown: IndexOutOfBounds: index: 0, size: 0. I'm not sure why it says this. If someone could tell me what I'm overlooking, or what needs to be done differently, it would be most appreciated. Here are the classes (abbreviated for your convenience). The first is the main() method class:
import java.lang.*;
import java.util.*;
public class MedievalQuestGame1{
public static void main(String[] args){
Places1.GoToPlace(0);
}And the second is a class called wilderness the Places class holds an arraylist of, and is suppossed to call methods from:
import java.lang.*;
import java.util.*;
public class Wilderness1{
String WildName;
//CLASS CONSTRUCTOR
public Wilderness1(String name){
WildName = name;
//GETWILDNAME
public String getWildName(){
return WildName;
//INTERFACE
public void Interface(){
System.out.println("Wilderness Interace online");
}import java.lang.*;
import java.util.*;
public class Places1{
static int i;
static Object WhatClass = new Object();
static Wilderness1 WildernessObject = new Wilderness1("happy place");
static ArrayList<Object> Places = new ArrayList<Object>(1);
//CLASS CONSTRUCTOR
private Places1(){
Wilderness1 BoisonBerry_Forest = new Wilderness1("happy place");
Places.add(BoisonBerry_Forest);
//GOTOPLACE method
public static void GoToPlace(int n){
i += n;
WhatClass = Places.get(i);
if(WhatClass instanceof Wilderness1){
//cast Places.get(i) object back to it's correct class
WildernessObject = (Wilderness1) Places.get(i);
//all this to call wilderness methods on the former "Object"
WildernessObject.Interface();make your class constructor in Places1 public instead of private:
//CLASS CONSTRUCTOR
public Places1 () {
Wilderness1 BoisonBerry_Forest = new Wilderness1("happy place");
Places.add(BoisonBerry_Forest);
}then remove the static keyword from GoToPlace:
public void GoToPlace(int n)finally, in your main method call GoToPlace from a created Places1 object, not a static call:
public static void main(String[] args){
Places1 places = new Places1 ();
places.GoToPlace (0);
} -
Non-void return type for Application Module Clients Interface
Hello, can anyone guide me on how will I solve my problem.
first of all, I'm using JDeveloper 10.1.3, I use JSF, ADF Faces, ADF Model, ADF Business Components.
I made a web page that has a Transactional Capabilities, all is going smoothly, all data's can be saved to oracle database. I created a Custom Method in my Application Module and can be used in Clients Interface, that method is for saving data's to database.
My problem is I dont know how to create a custom method that returns a value in my Application Module. Which means if I set it to non-void return type, it is not visible to Client Interface. If you're going to ask me why I need it to return a value? Well since that method is for saving data's, if there's an Error Occured, I can return the Error Message and show it to my user interface.
Please help. thanksIf you want to return your own type then simply define it as serializable and you will find that it will appear in the Client Interface dialog of your AM.
eg, you could return this type from your application module to progagate a meaningful message to your UI:
package com.delexian.model;
import java.io.Serializable;
public class MyMessage implements Serializable {
private String _severity;
private String _message;
public MyMessage() {
public void setSeverity(String severity) {
this._severity = severity;
public String getSeverity() {
return _severity;
public void setMessage(String message) {
this._message = message;
public String getMessage() {
return _message;
}regards,
Brenden -
RMI: swing: class ot interface expeted : public void
PLease take look at the program and the error, i have underlined the area where error has occured...
Thnk you
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.rmi.*;
import java.net.*;
public class appRMIcc extends Frame implements ActionListener{
JLabel l;
JTextField tf1,tf2;
JButton b;
public appRMIcc(){
setLayout(new FlowLayout());
l = new JLabel("Enter the Credit Card number");
tf1 = new JTextField(30);
tf2 = new JTextField(30);
b = new JButton("Check the Card Number");
add(l);add(tf1);add(b);
add(tf2);
b.addActionListener(this);
public void actionPerformed(ActionEvent e){ String cc = tf1.getText();
try{
RMIccinterface robj;
robj = (RMIccinterface) Naming.lookup("rmi://127.0.0.1/visagold");
if(robj.isValid(cc)) tf2.setText(String.valueOf("Credit Card valid"));
else
tf2.setText(String.valueOf("Invalid Credit Card Number"));
catch(Exception ex){
System.out.println(ex);
public static void main(String v[]){
appRMIcc dd = new appRMIcc();
dd.setSize(400,400);
dd.show();
i got the following error, i ra the above program in the command line, it worked fine but applet is not working..
--------------------Configuration: <Default>--------------------
C:\j2sdk\bin\appRMIcc.java:28: 'class' or 'interface' expected
public void actionPerformed(ActionEvent e){
^
1 error
Process completed.
public appRMIcc(){
setLayout(new FlowLayout());
l = new JLabel("Enter the Credit Card number");
tf1 = new JTextField(30);
tf2 = new JTextField(30);
b = new JButton("Check the Card Number");
add(l);add(tf1);add(b);
add(tf2);
b.addActionListener(this);
}If you say so... -
Unable to receive multicast on a multi network interface host
Can anyone please help?
I am not able to receive multicast on a multi network interface host.
This is the code:
public class LegacyMulticast {
public static void main(String[] args) throws IOException {
InetSocketAddress group = new InetSocketAddress("224.10.20.30", 12345);
NetworkInterface iface = NetworkInterface.getByName("eth3");
MulticastSocket socket = new MulticastSocket();
socket.setSoTimeout(5000);
socket.joinGroup(group , iface);
byte[] b = new byte[4096];
DatagramPacket datagram = new DatagramPacket(b, b.length);
try {
socket.receive(datagram);
System.out.println("Success");
catch (SocketTimeoutException ste) {
System.out.println("Failure");
socket.leaveGroup(group, iface);
The funny thing is that when I start this code, Wireshark detects IGMP join on the correct network interface caused by joinGroup call, followed by constant UDP traffic on correct port which I aim to receive and finally I see correct IGMP leave caused by leaveGroup call and the UDP traffic stops.
I just don't receive anything on socket.receive call.
I am trying to figure this one out for days now. Pls help someone :)
P.S. I suspected security, but System.getSecurityManager() call returns null.
P.P.S. I also tried implementing this with NIO, but with same result.public class LegacyMulticast {
public static void main(String[] args) throws IOException {
InetSocketAddress group = new InetSocketAddress("224.10.20.30", 12345);
NetworkInterface iface = NetworkInterface.getByName("eth3");
MulticastSocket socket = new MulticastSocket(12345);
socket.setSoTimeout(5000);
socket.joinGroup(group , iface);
byte[] b = new byte[4096];
DatagramPacket datagram = new DatagramPacket(b, b.length);
try {
socket.receive(datagram);
System.out.println("Success");
catch (SocketTimeoutException ste) {
System.out.println("Failure");
socket.leaveGroup(group, iface);
This is still not working.
The multicast is coming from the network (not localhost), OS is Windows 7.
When I start a multicast stream localy via VLC application on this same group and port, I receive the traffic in this Java application OK.
Once again, Wireshark detects IGMP join and leave and multicast traffic flow on eth3 network interface initiated by the Java application, but it just doesn't see the UDP datagrams. -
How to avoid redeclaring your web service interface?
Hi there,
How can one avoid having to redeclare your wsdl interface on
each mxml page where it is accessed? I only want to declare the web
service and the operation is has once and then just include it in
the component where I use it to access/update data.
I am new to flex so this may be obviouse to other but not me.
I tried including it in its own mxml file and then using the normal
component include tag to include it. I get errors about not being
able to access the webservice via its id.
e.g.
Error: Access of undefined property WebService.
[mxmlc] WebService.getSiteOptions.send();
thanksThe solution is to place the web definition in a separate
file and then use the "include" like functionality of defining your
own namespace in the xml. You do the include in the main
application file.
eg
<mx:Panel
xmlns:mx="
http://www.adobe.com/2006/mxml"
xmlns:webservice="webservice.*"
width="100%"
height="100%"
title="Reports Menu"
creationComplete="onInit();" >
On the main application page to include your web service file
do a
<webservice:webservices id="services"/>
The webservices.mxml file will contain your definitions.
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="
http://www.adobe.com/2006/mxml"
height="0"
visible="false">
<mx:Script>
<![CDATA[
import mx.rpc.soap.mxml.WebService;
import mx.rpc.events.FaultEvent;
import mx.controls.Alert;
[Bindable]
public var webServiceWSDL:String ="
http://127.0.0.1:8080/jumpingbean/services/AddWebService?wsdl";
public function onServiceFault(evt:FaultEvent):void
var err:Error = new Error(evt.fault.faultCode + " , " +
evt.fault.faultString);
parentApplication.showError(err);
public function onSuccess(evt:Event):void
Alert.show(evt.toString());
]]>
</mx:Script>
<!-- ======================================== -->
<!-- Remote Services -->
<!-- ======================================== -->
<mx:WebService id="webservice"
wsdl="{this.webServiceWSDL}" service="ValueAddWebService"
port="AppWebServiceHttpPort" fault="onServiceFault(event)"
showBusyCursor="true" >
etc
In your child components you can refer to the component by
doing a "parentApplication.services.webservice" -
PL/SQL to Java Interface - Overwhelming Overhead?
My company is running Oracle 10g R2. I am currently exploring the use of java classes from PL/SQL. This is because we have multiple code bases, including Java, PowerBuilder (which can interface with Java), and PL/SQL (which can interface with Java).
Doing some performance testing, I found some rather alarming results. Running a simple java function 1 million times, I tested performance of PL./SQL to java and PowerBuilder to Java.
In PL/SQL, the 1 mil calls executed in ~120 s.
In PowerBuilder, the 1 mil calls executed in ~54 s.
Is it possible that our database is incorrectly configured for best java performance? Not only does it appear that PowerBuilder, a much less pervasive language than PL/SQL, is over twice as fast, but the PB test was run on my laptop, which is no where near as powerful as the database server that the PL/SQL procedure ran against, leading me to believe that the performance gap is actually much wider.
Anyone have any tips to improve the performance? Or is this simply the nature of the beast? I can't seem to find any posts on the net about people experiencing huge PL/SQL to Java overhead, so I'm hoping it is just something I am doing wrong.
Thanks for your help!
-Brett BirschbachBelow is my test code. Any suggestions are appreciated.
Thanks!
-Brett
==================================================
Java Class:
public class TestConvert {
// For running straight from Java
public static void main(String[] args){
System.out.println(callAndTime());
// For running 1 mil calls with only one call from PowerBuilder or PL/SQL
public static long callAndTime(){
TestConvert.convertEsnDecToHex("13005454488");
long start = System.currentTimeMillis();
for (int i = 0; i < 1000000; i++){
TestConvert.convertEsnDecToHex("13005454488");
long end = System.currentTimeMillis();
return end-start;
// For performing the actual work
public static String convertEsnDecToHex(String esn) {
String result = null;
result = Integer.toHexString(new Integer(esn.substring(0, 3)).intValue());
result += Integer.toHexString(new Integer(esn.substring(3)).intValue());
return result.toUpperCase();
// Non-static wrapper necessary for PowerBuilder
public String callAndTimeNS(){
return String.valueOf(callAndTime());
// Non-static wrapper necessary for PowerBuilder
public String convertEsnDecToHexNS(String esn){
return convertEsnDecToHex(esn);
}PL/SQL Script for 1 Million Java Calls:
DECLARE
var VARCHAR2( 20 );
t_begin NUMBER;
t_end NUMBER;
BEGIN
var := testconvert.convertesndectohex( '13005454488' );
t_begin := DBMS_UTILITY.get_time;
FOR i IN 1 .. 1000000
LOOP
var := testconvert.convertesndectohex( '13005454488' );
END LOOP;
t_end := DBMS_UTILITY.get_time;
DBMS_OUTPUT.put_line( var );
DBMS_OUTPUT.put_line( ( t_end - t_begin ) / 100 || ' seconds' );
END;
/PowerBuilder for 1 Million Java Calls:
EJBConnection lEJBConn
TestConvert lnv_test
String ls_ret
Long i
Time t_begin, t_end
lEJBConn = CREATE EJBConnection
lEJBConn.CreateJavaInstance( lnv_test, "TestConvert")
ls_ret = lnv_test.convertesndectohexns("13005454488")
t_begin = now()
FOR i = 1 TO 1000000
ls_ret = lnv_test.convertesndectohexns("13005454488")
NEXT
t_end = now()
MessageBox("Hex Version",ls_ret + " - " + String(SecondsAfter(t_begin, t_end)) + " seconds")
DESTROY lEJBConn -
CR Server 2008 / Using openDocument interface with a no-logon wrapper
Hi, all!
I had a problem with the openDocument.jsp interface and a no-logon wrapper which took me quite a while to figure out. I'm now posting these results here in the hopes that someone else will find them useful. Of course, if anyone has input how to improve the solution, it's also welcome!
The system on which this was developed and tested was a vanilla Crystal Reports Server 2008 installation on Tomcat / MySQL / Windows Server 2003.
The problem was that calls to openDocument interface left sessions open and this quickly led to the situation where all the concurrent access licenses (CALs) were used. It seemed nondeterministic when a session was released; it could have been minutes or hours.
The solution: write a HTTP session timeout listener which logoffs the CRS-backend session. (The code below has still some dubug output enabled.)
package fi.niscayah.util;
import com.crystaldecisions.sdk.framework.IEnterpriseSession;
import javax.servlet.http.*;
import java.util.Date;
import java.util.Enumeration;
import java.text.SimpleDateFormat;
public class KillSession implements HttpSessionListener
public void sessionCreated(HttpSessionEvent event)
debug("sessionCreated()", event);
public void sessionDestroyed(HttpSessionEvent event)
HttpSession session = event.getSession();
try {
java.util.Enumeration name = session.getAttributeNames();
while (name.hasMoreElements()) {
String attributeName = (String)name.nextElement();
Object attribute = session.getAttribute(attributeName);
if((attribute != null) && (attribute instanceof IEnterpriseSession)) {
debug(" attribute : " + attributeName);
debug(" type : " + attribute.getClass().getName());
IEnterpriseSession ies = (IEnterpriseSession)attribute;
ies.logoff();
debug("sessionDestroyed()", event);
} catch (Exception ex) {
debug("sessionDestroyed() exception");
private void debug(String msg)
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
String timestamp = sdf.format(new Date());
System.err.println("[KillSession] [" + timestamp + "] " + msg);
private void debug(String msg, HttpSessionEvent event)
HttpSession session = event.getSession();
String id = session.getId();
String context = session.getServletContext().getServletContextName();
debug("[" + context + "] [" + id + "] " + msg);
(If you want to test the above code, create a .jar package out of it and put it in webapps/OpenDocument/WEB-INF/lib.)
Next we need to register our listener. I noticed that the openDocument-webapp's web.xml-file already contained a listener definition that claimed to expire enterprise sessions on HTTP timeout. I never saw such results; I tested it by registering my own listener, which only outputted debug information, and then when ever a session timeout happened, I checked the amount of licenses in use via the CMC - it never dropped predictably.
So, comment out the SessionCleanupListener and add KillSession.
<!-- SK: Added own listener. -->
<listener>
<listener-class>fi.niscayah.util.KillSession</listener-class>
</listener>
<!-- SK: Commented out. -->
<!-- SessionCleanupListener is used to expire the EnterpriseSession when the web session is timeout -->
<!-- <listener>
<listener-class>com.businessobjects.sdk.ceutils.SessionCleanupListener</listener-class>
</listener> -->
After the above, change the HTTP session timeout to something more suitable. If you're creating really big reports, one minute might be too little. Also notice, that the value is an approximation. The timeout event might happen just as one minute has passed, but usually it takes more.
<session-config>
<session-timeout>1</session-timeout>
</session-config>
Now we're good to go and test the openDocument interface. The result should be that every time a HTTP session timeouts, an enterprise session (which was initialized via the openDocument call) is logged off.
Next the no-logon wrapper.
I found a lot of examples for logging in automatically, but every one of them exhibited a strange behavior (at least when used in conjunction with the openDocument interface) where the session count was increased by two. A lot of head scratching later, the solution below was devised.
<%@ page language="java"
import = "com.crystaldecisions.sdk.framework.CrystalEnterprise,
com.crystaldecisions.sdk.framework.IEnterpriseSession,
com.crystaldecisions.sdk.framework.ISessionMgr,
com.crystaldecisions.sdk.exception.SDKException"
%>
<%
ISessionMgr sessionManager = CrystalEnterprise.getSessionMgr();
IEnterpriseSession entSession = sessionManager.logon("Guest", "", "<server>:6400", "secEnterprise");
String entToken = entSession.getLogonTokenMgr().createWCAToken("", 1, 1);
// So that this can be logged off when the session timeouts
HttpSession httpSession = request.getSession();
httpSession.setAttribute("nologon_SESSION", entSession);
String query = request.getQueryString();
String redirectURL = "http://<server>:8080/OpenDocument/opendoc/openDocument.jsp?" +
query + "&token=" + entToken;
response.sendRedirect(redirectURL);
%>
You can put the above .jsp-file where you like, but I dropped it in webapps/openDocument, since it's no use by itself.
The use of nologon.jsp is simple: use it as you would openDocument.jsp.
And there you have it. A word of warning though, if you're not sure what you're doing, I wouldn't recommend trying these things out. And you certainly shouldn't deploy these on a production environment.
As said before, any input is welcome!I'll comment on the BusinessObjects Enterprise logon tokens that you may generate via the Enterprise SDK.
DefaultToken - this is used for failover - i.e., if the original EnterpriseSession object is destroyed without having logoff() method invoked, the failover can be used to re-connect to Enterprise without redo-ing authentication. This token is immediately invalidated with EnterpriseSession.logoff().
CreateLogonToken - token represents an EnterpriseSession independent of the original EnterpriseSession that generates it. So you should generated the CreateLogonToken and log off the EnterpriseSession before using the token, or you'll have two licenses being used.
CreateWCAToken - the Web Component Adapter token - this token is tied to the EnterpriseSession used to create it. If this EnterpriseSession is invalidated, the WCA token can no longer be used. Since this is essentially re-use of the original EnterpriseSession, license count is not increased with its use.
So in your application, you're generating the WCA Token, and using the Session Listener to explicitly log off the originating EnterpriseSession. The SessionCleanupListener is for cleaning up sessions created within InfoView on Web Application Server Session timeout.
Sincerely,
Ted Ueda -
How to fix 'class' or 'interface' expected for jsp
below is the stack trace
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
/home/sherali/.netbeans/5.5/apache-tomcat-5.5.17_base/work/Catalina/localhost/UVSDataSearch/org/apache/jsp/pager_002ddemo_jsp.java:7: 'class' or 'interface' expected
import java.util.*;
^
Generated servlet error:
/home/sherali/.netbeans/5.5/apache-tomcat-5.5.17_base/work/Catalina/localhost/UVSDataSearch/org/apache/jsp/pager_002ddemo_jsp.java:8: 'class' or 'interface' expected
import java.io.*;
^
2 errors
thanks a lot in advance.
my jsp is
<%@ page session="false" %>
<%@ page import="tauvex.*;" %>
<%@ page import="java.util.*" %>
<%@ page import="java.io.*" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://jsptags.com/tags/navigation/pager" prefix="pg" %>
<html>
<head>
<title>Tauvex Search Results</title>
<%
* Pager Tag Library
* Copyright (C) 2002 James Klicman <[email protected]>
* The latest release of this tag library can be found at
* http://jsptags.com/tags/navigation/pager/
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
%>
<style type="text/css">
A.nodec { text-decoration: none; }
</style>
</head>
<body bgcolor="#ffffff">
<%
String style = getParam(request, "style", "simple");
String position = getParam(request, "position", "top");
String index = getParam(request, "index", "center");
int maxPageItems = getParam(request, "maxPageItems", 3);
int maxIndexPages = getParam(request, "maxIndexPages", 3);
%>
<%
String query1=(String)request.getAttribute("query1");
String query=(String)request.getAttribute("query");
String ShowFile=(String)request.getAttribute("ShowFile");
String ShowRA=(String)request.getAttribute("ShowRA");
String ShowDEC=(String)request.getAttribute("ShowDEC");
String Telescope=(String)request.getAttribute("Telescope");
String ObservationDates=(String)request.getAttribute("ObservationDates");
String Filter=(String)request.getAttribute("Filter");
String RA=(String)request.getAttribute("RA");
String DEC=(String)request.getAttribute("DEC");
String DATE=(String)request.getAttribute("DATE");
String DATE1=(String)request.getAttribute("DATE1");
String Radious=(String)request.getAttribute("Radious");
String FILTER[]=(String[])request.getAttribute("FILTER");
String OrderBy1=(String)request.getAttribute("OrderBy1");
String OrderBy2=(String)request.getAttribute("OrderBy2");
String OrderBy3=(String)request.getAttribute("OrderBy3");
%>
<%
out.println("<form action=\"PlainSQLQuery\" method=POST>");
out.println("<textarea rows = 5 cols = 40 name=query id=\"query\">");
out.println(query);
out.println("</textarea>");
out.println("<input type = submit value = \"Submit\">");
out.println("<input type = reset value = \"Reset\">");
out.println("</form>");
%>
<center>
<table border="0" width="90%" cellpadding="4">
<tr>
<td colspan="2" align="left" valign="top">
<table border="0" cellspacing="2" cellpadding="0">
<tr><td>Max. Page Items </td>
<td><input type="text" size="4" name="maxPageItems" value="<%= maxPageItems %>" onChange="this.form.submit();"></td></tr>
<tr><td>Max. Index Pages </td>
<td><input type="text" size="4" name="maxIndexPages" value="<%= maxIndexPages %>" onChange="this.form.submit();"></td></tr>
</table>
</td>
</tr>
</table>
<pg:pager
index="<%= index %>"
maxPageItems="<%= maxPageItems %>"
maxIndexPages="<%= maxIndexPages %>"
url="TauvexDataServlet"
export="offset,currentPageNumber=pageNumber"
scope="request">
<%-- keep track of preference --%>
<pg:param name="style"/>
<pg:param name="position"/>
<pg:param name="index"/>
<pg:param name="maxPageItems"/>
<pg:param name="maxIndexPages"/>
<pg:param name="RA"/>
<pg:param name="DEC"/>
<pg:param name="DATE"/>
<pg:param name="DATE1"/>
<pg:param name="Radious"/>
<pg:param name="FILTER"/>
<pg:param name="ShowRA"/>
<pg:param name="ShowDEC"/>
<pg:param name="Telescope"/>
<pg:param name="ObservationDates"/>
<pg:param name="Filter"/>
<pg:param name="OrderBy1"/>
<pg:param name="OrderBy2"/>
<pg:param name="OrderBy3"/>
<%-- save pager offset during form changes --%>
<input type="hidden" name="pager.offset" value="<%= offset %>">
<%-- warn if offset is not a multiple of maxPageItems --%>
<% if (offset.intValue() % maxPageItems != 0 &&
("alltheweb".equals(style) || "lycos".equals(style)) )
%>
<p>Warning: The current page offset is not a multiple of Max. Page Items.
<br>Please
<pg:first><a href="<%= pageUrl %>">return to the first page</a></pg:first>
if any displayed range numbers appear incorrect.</p>
<% } %>
<%-- the pg:pager items attribute must be set to the total number of
items for index before items to work properly --%>
<% if ("top".equals(position) || "both".equals(position)) { %>
<br>
<pg:index>
<% if ("texticon".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/texticon.jsp" flush="true"/>
<% } else if ("jsptags".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/jsptags.jsp" flush="true"/>
<% } else if ("google".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/google.jsp" flush="true"/>
<% } else if ("altavista".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/altavista.jsp" flush="true"/>
<% } else if ("lycos".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/lycos.jsp" flush="true"/>
<% } else if ("yahoo".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/yahoo.jsp" flush="true"/>
<% } else if ("alltheweb".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/alltheweb.jsp" flush="true"/>
<% } else { %>
<jsp:include page="/WEB-INF/jsp/simple.jsp" flush="true"/>
<% } %>
</pg:index>
<% } %>
<hr>
<form action="ZipServlet" method="get" name="download" onsubmit="return Form1_Validator(this)">
<table id="output">
<CAPTION><EM>Fits file Search Results</EM></CAPTION><tr>
<%
out.println("<th>Check Box</th>");
out.println("<th>File Name</th>");
if(ShowRA != null && "on".equals(ShowRA))
out.println("<th>RA_START</th>");
if(ShowRA != null && "on".equals(ShowRA))
out.println("<th>RA_END</th>");
if(ShowDEC != null && "on".equals(ShowDEC))
out.println("<th>DEC_START</th>");
if(ShowDEC != null && "on".equals(ShowDEC))
out.println("<th>DEC_END</th>");
if(Telescope!=null && "on".equals(Telescope))
out.println("<th>Telescope</th>");
if(ObservationDates !=null && "on".equals(ObservationDates))
out.println("<th>STARTOBS</th>");
if(ObservationDates !=null && "on".equals(ObservationDates))
out.println("<th>ENDOBS</th>");
if(Filter!=null && "on".equals(Filter))
out.println("<th>FILTER</th>");
out.println("</tr>");
%>
<%--
<table width="90%" cellspacing="4" cellpadding="4">
Since the data source is static, it's easy to offset and limit the
loop for efficiency. If the data set size is not known or cannot
be easily offset, the pager tag library can count the items and display
the correct subset for you.
The following is an example using an enumeration data source of
unknown size. The pg:pager items and isOffset attributes must
not be set for this example:
--%>
<%
Enumeration myDataList1 = (Enumeration)request.getAttribute("myDataList1");
if (myDataList1 == null)
throw new RuntimeException("myDataList1 is null");
%>
<% while (myDataList1.hasMoreElements()) { %>
<% TauvexData elem = (TauvexData)myDataList1.nextElement(); %>
<pg:item> <%
out.println("<tr>");
%>
<td><input type= "checkbox" name="cb" value="<%=elem.getDownload()%>"></td>
<td><a href="<%= elem.getDownload() %>"><%= elem.Fitsfilename %></a></td>
<%
// out.println("<td> "+elem.Fitsfilename+" </td>");
if(ShowRA != null && "on".equals(ShowRA))
out.println("<td> "+elem.RA_START+" </td>");
if(ShowRA != null && "on".equals(ShowRA))
out.println("<td> "+elem.RA_END+"</td>");
if(ShowDEC != null && "on".equals(ShowDEC))
out.println("<td> "+elem.DEC_START+" </td>");
if(ShowDEC != null && "on".equals(ShowDEC))
out.println("<td> "+elem.DEC_END+" </td>");
if(Telescope!=null && "on".equals(Telescope))
out.println("<td> "+elem.telescope+" </td>");
if(ObservationDates !=null && "on".equals(ObservationDates))
out.println("<td> "+elem.STARTOBS+" </td>");
if(ObservationDates !=null && "on".equals(ObservationDates))
out.println(" <td> "+elem.ENDOBS+" </td>");
if(Filter!=null && "on".equals(Filter))
out.println("<td> "+elem.FILTER+" </td>");
out.println("</tr>");
%> </pg:item>
<% } %>
</table>
<input type="button" name="CheckAll" value="Check All Boxes" onclick="modify_boxes(true,3)">
<input type="button" name="UnCheckAll" value="UnCheck All Boxes" onclick="modify_boxes(false,3)">
<input type="submit" value="Download">
</form>
<hr>
<pg:pages>
<a href="<%= pageUrl %>"><%= pageNumber %></a>
</pg:pages>
<pg:last>
<a href="<%= pageUrl %>">[ Last >| (<%= pageNumber %>) ]</a>
</pg:last>
<% if ("bottom".equals(position) || "both".equals(position)) { %>
<pg:index>
<% if ("texticon".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/texticon.jsp" flush="true"/>
<% } else if ("jsptags".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/jsptags.jsp" flush="true"/>
<% } else if ("google".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/google.jsp" flush="true"/>
<% } else if ("altavista".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/altavista.jsp" flush="true"/>
<% } else if ("lycos".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/lycos.jsp" flush="true"/>
<% } else if ("yahoo".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/yahoo.jsp" flush="true"/>
<% } else if ("alltheweb".equals(style)) { %>
<jsp:include page="/WEB-INF/jsp/alltheweb.jsp" flush="true"/>
<% } else { %>
<jsp:include page="/WEB-INF/jsp/simple.jsp" flush="true"/>
<% } %>
</pg:index>
<% } %>
</pg:pager>
</center>
</body>
</html>
<%!
private static int num =1;
private static String getName(){
String str="cb";
str=str+num;
num++;
return str ;
private static final String getParam(ServletRequest request, String name,
String defval)
String param = request.getParameter(name);
return (param != null ? param : defval);
private static final int getParam(ServletRequest request, String name,
int defval)
String param = request.getParameter(name);
int value = defval;
if (param != null) {
try { value = Integer.parseInt(param); }
catch (NumberFormatException ignore) { }
return value;
private static void radio(PageContext pc, String name, String value,
boolean isDefault) throws java.io.IOException
JspWriter out = pc.getOut();
String param = pc.getRequest().getParameter(name);
out.write("<input type=\"radio\" name=\"");
out.write(name);
out.write("\" value=\"");
out.write(value);
out.write("\" onChange=\"this.form.submit();\"");
if (value.equals(param) || (isDefault && param == null))
out.write(" checked");
out.write('>');
%>Well, putting all that Java code into a JSP was a bad idea in the first place, just on general design principles. But you've done it in such a way that the result of compiling the JSP is malformed Java code. Frankly I would just throw it away and put the Java code into a servlet or some other Java class, where it belongs.
But if you're really working in a place where nobody has learned anything since 2003, and you're forced to support that old junk, then I would point out that the error occurs before the place which generates this line:
import java.util.*;You only need to look at two of the thousand lines of code you posted. -
I have a series of questions....... Go through.
What is the use of abstract interface in java ?
What is the use of static object in java ?
What is the use of abstract key word to variables ?
Object reference passed to method are final. Can ' t we change it ?class Testing {
int i;
public class RefFinal {
public static void f ( Testing t1, Testing t2) {
Testing temp;
temp=t1;
t1=t2;
t2=temp;
System.out.println("value of i in t1 =" +t1.i);
System.out.println("value of i in t2 =" +t2.i);
public static void main( String args[]) {
Testing t1 = new Testing();
Testing t2 = new Testing();
t1.i=10;
t2.i=20;
f(t1,t2);
System.out.println("value of i in t1 =" +t1.i);
System.out.println("value of i in t2 =" +t2.i);
} Here the code explain why? -
DO i need some extra hardware interface for receving both Audio and video
hi i m doing e-learning project. i have to capture video from webcam and voice from headphone and send to client.
but my code is working fine for either one at a time.
DO i need some extra hardware interface for receving both Audio and video. im using code AVTransmit and AVReceive found from this site only
After running TX
i give Dsound:// & vfw://0 in Media Locater only sound is received and no vedio
and when i give vfw://0 in Media Locater only live video is transmited.
im using JMF1.1.2e.
if any one know the method to run or cause of it plz reply me soon. i will be very thankfull
transmiter/server side code .first run TX on server
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.util.*;
import javax.media.rtp.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
public class Tx extends JFrame implements ActionListener, KeyListener,
MouseListener, WindowListener {
Vector targets;
JList list;
JButton startXmit;
JButton rtcp;
JButton update;
JButton expiration;
JButton statistics;
JButton addTarget;
JButton removeTarget;
JTextField tf_remote_address;
JTextField tf_remote_data_port;
JTextField tf_media_file;
JTextField tf_data_port;
TargetListModel listModel;
AVTransmitter avTransmitter;
RTCPViewer rtcpViewer;
JCheckBox cb_loop;
Config config;
public Tx() {
setTitle( "JMF/RTP Transmitter");
config= new Config();
GridBagLayout gridBagLayout= new GridBagLayout();
GridBagConstraints gbc;
JPanel p= new JPanel();
p.setLayout( gridBagLayout);
JPanel localPanel= createLocalPanel();
gbc= new GridBagConstraints();
gbc.gridx= 0;
gbc.gridy= 0;
gbc.gridwidth= 2;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( localPanel, gbc);
p.add( localPanel);
JPanel targetPanel= createTargetPanel();
gbc= new GridBagConstraints();
gbc.gridx= 1;
gbc.gridy= 1;
gbc.weightx= 1.0;
gbc.weighty= 1.0;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( targetPanel, gbc);
p.add( targetPanel);
JPanel mediaPanel= createMediaPanel();
gbc= new GridBagConstraints();
gbc.gridx= 1;
gbc.gridy= 2;
gbc.weightx= 1.0;
gbc.weighty= 1.0;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( mediaPanel, gbc);
p.add( mediaPanel);
JPanel buttonPanel= new JPanel();
rtcp= new JButton( "RTCP Monitor");
update= new JButton( "Transmission Status");
update.setEnabled( false);
rtcp.addActionListener( this);
update.addActionListener( this);
buttonPanel.add( rtcp);
buttonPanel.add( update);
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 3;
gbc.gridwidth= 2;
gbc.weightx = 1.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.CENTER;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( buttonPanel, gbc);
p.add( buttonPanel);
getContentPane().add( p);
list.addMouseListener( this);
addWindowListener( this);
pack();
setVisible( true);
private JPanel createMediaPanel() {
JPanel p= new JPanel();
GridBagLayout gridBagLayout= new GridBagLayout();
GridBagConstraints gbc;
p.setLayout( gridBagLayout);
JLabel label= new JLabel( "Media Locator:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( label, gbc);
p.add( label);
tf_media_file= new JTextField( 35);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.weightx = 1.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( tf_media_file, gbc);
p.add( tf_media_file);
tf_media_file.setText( config.media_locator);
cb_loop= new JCheckBox( "loop");
startXmit= new JButton( "Start Transmission");
startXmit.setEnabled( true);
startXmit.addActionListener( this);
gbc= new GridBagConstraints();
gbc.gridx = 2;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( cb_loop, gbc);
p.add( cb_loop);
cb_loop.setSelected( true);
cb_loop.addActionListener( this);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.CENTER;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( startXmit, gbc);
p.add( startXmit);
TitledBorder titledBorder= new TitledBorder( new EtchedBorder(), "Source");
p.setBorder( titledBorder);
return p;
private JPanel createTargetPanel() {
JPanel p= new JPanel();
GridBagLayout gridBagLayout= new GridBagLayout();
GridBagConstraints gbc;
p.setLayout( gridBagLayout);
targets= new Vector();
for( int i= 0; i < config.targets.size(); i++) {
targets.addElement( config.targets.elementAt( i));
listModel= new TargetListModel( targets);
list= new JList( listModel);
list.addKeyListener( this);
list.setPrototypeCellValue( "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
JScrollPane scrollPane= new JScrollPane( list,
ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
gbc= new GridBagConstraints();
gbc.gridx= 0;
gbc.gridy= 0;
gbc.weightx= 1.0;
gbc.weighty= 1.0;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( scrollPane, gbc);
p.add( scrollPane);
JPanel p1= new JPanel();
p1.setLayout( gridBagLayout);
JLabel label= new JLabel( "IP Address:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( label, gbc);
p1.add( label);
tf_remote_address= new JTextField( 15);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( tf_remote_address, gbc);
p1.add( tf_remote_address);
label= new JLabel( "Data Port:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( label, gbc);
p1.add( label);
tf_remote_data_port= new JTextField( 15);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( tf_remote_data_port, gbc);
p1.add( tf_remote_data_port);
JPanel p2= new JPanel();
addTarget= new JButton( "Add Target");
removeTarget= new JButton( "Remove Target");
p2.add( addTarget);
p2.add( removeTarget);
addTarget.addActionListener( this);
removeTarget.addActionListener( this);
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 2;
gbc.weightx = 1.0;
gbc.weighty = 0.0;
gbc.gridwidth= 2;
gbc.anchor = GridBagConstraints.CENTER;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets( 20,5,0,5);
((GridBagLayout)p1.getLayout()).setConstraints( p2, gbc);
p1.add( p2);
gbc= new GridBagConstraints();
gbc.gridx= 1;
gbc.gridy= 0;
gbc.weightx= 1.0;
gbc.weighty= 1.0;
gbc.anchor= GridBagConstraints.CENTER;
gbc.fill= GridBagConstraints.BOTH;
gbc.insets= new Insets( 10, 5, 0, 0);
((GridBagLayout)p.getLayout()).setConstraints( p1, gbc);
p.add( p1);
TitledBorder titledBorder= new TitledBorder( new EtchedBorder(), "Targets");
p.setBorder( titledBorder);
return p;
private JPanel createLocalPanel() {
JPanel p= new JPanel();
GridBagLayout gridBagLayout= new GridBagLayout();
GridBagConstraints gbc;
p.setLayout( gridBagLayout);
JLabel label= new JLabel( "IP Address:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p.getLayout()).setConstraints( label, gbc);
p.add( label);
JTextField tf_local_host= new JTextField( 15);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 0;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p.getLayout()).setConstraints( tf_local_host, gbc);
p.add( tf_local_host);
try {
String host= InetAddress.getLocalHost().getHostAddress();
tf_local_host.setText( host);
} catch( UnknownHostException e) {
label= new JLabel( "Data Port:");
gbc= new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,0,5);
((GridBagLayout)p.getLayout()).setConstraints( label, gbc);
p.add( label);
tf_data_port= new JTextField( 15);
gbc= new GridBagConstraints();
gbc.gridx = 1;
gbc.gridy = 1;
gbc.weightx = 0.0;
gbc.weighty = 0.0;
gbc.anchor = GridBagConstraints.WEST;
gbc.fill = GridBagConstraints.NONE;
gbc.insets = new Insets( 5,5,10,5);
((GridBagLayout)p.getLayout()).setConstraints( tf_data_port, gbc);
p.add( tf_data_port);
tf_data_port.setText( config.local_data_port);
TitledBorder titledBorder= new TitledBorder( new EtchedBorder(), "Local Host");
p.setBorder( titledBorder);
return p;
public void actionPerformed( ActionEvent event) {
Object source= event.getSource();
if( source == addTarget) {
String ip= tf_remote_address.getText().trim();
String port= tf_remote_data_port.getText().trim();
String localPort= tf_data_port.getText().trim();
addTargetToList( localPort, ip, port);
if( avTransmitter != null) {
avTransmitter.addTarget( ip, port);
} else if( source == removeTarget) {
int index= list.getSelectedIndex();
if( index != -1) {
Target target= (Target) targets.elementAt( index);
if( avTransmitter != null) {
avTransmitter.removeTarget( target.ip, target.port);
targets.removeElement( target);
listModel.setData( targets);
} else if( source == startXmit) {
if( startXmit.getLabel().equals( "Start Transmission")) {
int data_port= new Integer( tf_data_port.getText()).intValue();
avTransmitter= new AVTransmitter( this, data_port);
avTransmitter.start( tf_media_file.getText().trim(), targets);
avTransmitter.setLooping( cb_loop.isSelected());
startXmit.setLabel( "Stop Transmission");
} else if( startXmit.getLabel().equals( "Stop Transmission")) {
avTransmitter.stop();
avTransmitter= null;
removeNonBaseTargets();
listModel.setData( targets);
startXmit.setLabel( "Start Transmission");
} else if( source == rtcp) {
if( rtcpViewer == null) {
rtcpViewer= new RTCPViewer();
} else {
rtcpViewer.setVisible( true);
rtcpViewer.toFront();
} else if( source == cb_loop) {
if( avTransmitter != null) {
avTransmitter.setLooping( cb_loop.isSelected());
private void removeNonBaseTargets() {
String localPort= tf_data_port.getText().trim();
for( int i= targets.size(); i > 0;) {
Target target= (Target) targets.elementAt( i - 1);
if( !target.localPort.equals( localPort)) {
targets.removeElement( target);
i--;
public void addTargetToList( String localPort,
String ip, String port) {
ListUpdater listUpdater= new ListUpdater( localPort, ip,
port, listModel, targets);
SwingUtilities.invokeLater( listUpdater);
public void rtcpReport( String report) {
if( rtcpViewer != null) {
rtcpViewer.report( report);
public void windowClosing( WindowEvent event) {
config.local_data_port= tf_data_port.getText().trim();
config.targets= new Vector();
for( int i= 0; i < targets.size(); i++) {
Target target= (Target) targets.elementAt( i);
if( target.localPort.equals( config.local_data_port)) {
config.addTarget( target.ip, target.port);
config.media_locator= tf_media_file.getText().trim();
config.write();
System.exit( 0);
public void windowClosed( WindowEvent event) {
public void windowDeiconified( WindowEvent event) {
public void windowIconified( WindowEvent event) {
public void windowActivated( WindowEvent event) {
public void windowDeactivated( WindowEvent event) {
public void windowOpened( WindowEvent event) {
public void keyPressed( KeyEvent event) {
public void keyReleased( KeyEvent event) {
Object source= event.getSource();
if( source == list) {
int index= list.getSelectedIndex();
public void keyTyped( KeyEvent event) {
public void mousePressed( MouseEvent e) {
public void mouseReleased( MouseEvent e) {
public void mouseEntered( MouseEvent e) {
public void mouseExited( MouseEvent e) {
public void mouseClicked( MouseEvent e) {
Object source= e.getSource();
if( source == list) {
int index= list.getSelectedIndex();
if( index != -1) {
Target target= (Target) targets.elementAt( index);
tf_remote_address.setText( target.ip);
tf_remote_data_port.setText( target.port);
int index= list.locationToIndex( e.getPoint());
public static void main( String[] args) {
new Tx();
class TargetListModel extends AbstractListModel {
private Vector options;
public TargetListModel( Vector options) {
this.options= options;
public int getSize() {
int size;
if( options == null) {
size= 0;
} else {
size= options.size();
return size;
public Object getElementAt( int index) {
String name;
if( index < getSize()) {
Target o= (Target)options.elementAt( index);
name= o.localPort + " ---> " + o.ip + ":" + o.port;
} else {
name= null;
return name;
public void setData( Vector data) {
options= data;
fireContentsChanged( this, 0, data.size());
class ListUpdater implements Runnable {
String localPort, ip, port;
TargetListModel listModel;
Vector targets;
public ListUpdater( String localPort, String ip, String port,
TargetListModel listModel, Vector targets) {
this.localPort= localPort;
this.ip= ip;
this.port= port;
this.listModel= listModel;
this.targets= targets;
public void run() {
Target target= new Target( localPort, ip, port);
if( !targetExists( localPort, ip, port)) {
targets.addElement( target);
listModel.setData( targets);
public boolean targetExists( String localPort, String ip, String port) {
boolean exists= false;
for( int i= 0; i < targets.size(); i++) {
Target target= (Target) targets.elementAt( i);
if( target.localPort.equals( localPort)
&& target.ip.equals( ip)
&& target.port.equals( port)) {
exists= true;
break;
return exists;
>>>>>>>>>>>>>>>>>
import java.awt.*;
import java.io.*;
import java.net.InetAddress;
import java.util.*;
import javax.media.*;
import javax.media.protocol.*;
import javax.media.format.*;
import javax.media.control.TrackControl;
import javax.media.control.QualityControl;
import javax.media.rtp.*;
import javax.media.rtp.event.*;
import javax.media.rtp.rtcp.*;
public class AVTransmitter implements ReceiveStreamListener, RemoteListener,
ControllerListener {
// Input MediaLocator
// Can be a file or http or capture source
private MediaLocator locator;
private String ipAddress;
private int portBase;
private Processor processor = null;
private RTPManager rtpMgrs[];
private int localPorts[];
private DataSource dataOutput = null;
private int local_data_port;
private Tx tx;
public AVTransmitter( Tx tx, int data_port) {
this.tx= tx;
local_data_port= data_port;
* Starts the transmission. Returns null if transmission started ok.
* Otherwise it returns a string with the reason why the setup failed.
public synchronized String start( String filename, Vector targets) {
String result;
locator= new MediaLocator( filename);
// Create a processor for the specified media locator
// and program it to output JPEG/RTP
result = createProcessor();
if (result != null) {
return result;
// Create an RTP session to transmit the output of the
// processor to the specified IP address and port no.
result = createTransmitter( targets);
if (result != null) {
processor.close();
processor = null;
return result;
// Start the transmission
processor.start();
return null;
* Use the RTPManager API to create sessions for each media
* track of the processor.
private String createTransmitter( Vector targets) {
// Cheated. Should have checked the type.
PushBufferDataSource pbds = (PushBufferDataSource)dataOutput;
PushBufferStream pbss[] = pbds.getStreams();
rtpMgrs = new RTPManager[pbss.length];
localPorts = new int[ pbss.length];
SessionAddress localAddr, destAddr;
InetAddress ipAddr;
SendStream sendStream;
int port;
SourceDescription srcDesList[];
for (int i = 0; i < pbss.length; i++) {
// for (int i = 0; i < 1; i++) {
try {
rtpMgrs[i] = RTPManager.newInstance();
port = local_data_port + 2*i;
localPorts[ i]= port;
localAddr = new SessionAddress( InetAddress.getLocalHost(),
port);
rtpMgrs.initialize( localAddr);
rtpMgrs[i].addReceiveStreamListener(this);
rtpMgrs[i].addRemoteListener(this);
for( int k= 0; k < targets.size(); k++) {
Target target= (Target) targets.elementAt( k);
int targetPort= new Integer( target.port).intValue();
addTarget( localPorts[ i], rtpMgrs[ i], target.ip, targetPort + 2*i);
sendStream = rtpMgrs[i].createSendStream(dataOutput, i);
sendStream.start();
} catch (Exception e) {
e.printStackTrace();
return e.getMessage();
return null;
public void addTarget( String ip, String port) {
for (int i= 0; i < rtpMgrs.length; i++) {
int targetPort= new Integer( port).intValue();
addTarget( localPorts[ i], rtpMgrs[ i], ip, targetPort + 2*i);
public void addTarget( int localPort, RTPManager mgr, String ip, int port) {
try {
SessionAddress addr= new SessionAddress( InetAddress.getByName( ip),
new Integer( port).intValue());
mgr.addTarget( addr);
tx.addTargetToList( localPort + "", ip, port + "");
} catch( Exception e) {
e.printStackTrace();
public void removeTarget( String ip, String port) {
try {
SessionAddress addr= new SessionAddress( InetAddress.getByName( ip),
new Integer( port).intValue());
for (int i= 0; i < rtpMgrs.length; i++) {
rtpMgrs[ i].removeTarget( addr, "target removed from transmitter.");
} catch( Exception e) {
e.printStackTrace();
boolean looping= true;
public void controllerUpdate( ControllerEvent ce) {
System.out.println( ce);
if( ce instanceof DurationUpdateEvent) {
Time duration= ((DurationUpdateEvent) ce).getDuration();
System.out.println( "duration: " + duration.getSeconds());
} else if( ce instanceof EndOfMediaEvent) {
System.out.println( "END OF MEDIA - looping=" + looping);
if( looping) {
processor.setMediaTime( new Time( 0));
processor.start();
public void setLooping( boolean flag) {
looping= flag;
public void update( ReceiveStreamEvent event) {
String timestamp= getTimestamp();
StringBuffer sb= new StringBuffer();
if( event instanceof InactiveReceiveStreamEvent) {
sb.append( timestamp + " Inactive Receive Stream");
} else if( event instanceof ByeEvent) {
sb.append( timestamp + " Bye");
} else {
System.out.println( "ReceiveStreamEvent: "+ event);
tx.rtcpReport( sb.toString());
public void update( RemoteEvent event) {
String timestamp= getTimestamp();
if( event instanceof ReceiverReportEvent) {
ReceiverReport rr= ((ReceiverReportEvent) event).getReport();
StringBuffer sb= new StringBuffer();
sb.append( timestamp + " RR");
if( rr != null) {
Participant participant= rr.getParticipant();
if( participant != null) {
sb.append( " from " + participant.getCNAME());
sb.append( " ssrc=" + rr.getSSRC());
} else {
sb.append( " ssrc=" + rr.getSSRC());
tx.rtcpReport( sb.toString());
} else {
System.out.println( "RemoteEvent: " + event);
private String getTimestamp() {
String timestamp;
Calendar calendar= Calendar.getInstance();
int hour= calendar.get( Calendar.HOUR_OF_DAY);
String hourStr= formatTime( hour);
int minute= calendar.get( Calendar.MINUTE);
String minuteStr= formatTime( minute);
int second= calendar.get( Calendar.SECOND);
String secondStr= formatTime( second);
timestamp= hourStr + ":" + minuteStr + ":" + secondStr;
return timestamp;
private String formatTime( int time) {
String timeStr;
if( time < 10) {
timeStr= "0" + time;
} else {
timeStr= "" + time;
return timeStr;
* Stops the transmission if already started
public void stop() {
synchronized (this) {
if (processor != null) {
processor.stop();
processor.close();
processor = null;
for (int i= 0; i < rtpMgrs.length; i++) {
rtpMgrs[ i].removeTargets( "Session ended.");
rtpMgrs[ i].dispose();
public String createProcessor() {
if (locator == null) {
return "Locator is null";
DataSource ds;
DataSource clone;
try {
ds = javax.media.Manager.createDataSource(locator);
} catch (Exception e) {
return "Couldn't create DataSource";
// Try to create a processor to handle the input media locator
try {
processor = javax.media.Manager.createProcessor(ds);
processor.addControllerListener( this);
} catch (NoProcessorException npe) {
return "Couldn't create processor";
} catch (IOException ioe) {
return "IOException creating processor";
// Wait for it to configure
boolean result = waitForState(processor, Processor.Configured);
if (result == false)
return "Couldn't configure processor";
// Get the tracks from the processor
TrackControl [] tracks = processor.getTrackControls();
// Do we have atleast one track?
if (tracks == null || tracks.length < 1)
return "Couldn't find tracks in processor";
// Set the output content descriptor to RAW_RTP
// This will limit the supported formats reported from
// Track.getSupportedFormats to only valid RTP formats.
ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW_RTP);
processor.setContentDescriptor(cd);
Format supported[];
Format chosen;
boolean atLeastOneTrack = false;
// Program the tracks.
for (int i = 0; i < tracks.length; i++) {
Format format = tracks[i].getFormat();
if (tracks[i].isEnabled()) {
supported = tracks[i].getSupportedFormats();
// We've set the output content to the RAW_RTP.
// So all the supported formats should work with RTP.
// We'll just pick the first one.
if (supported.length > 0) {
if (supported[0] instanceof VideoFormat) {
// For video formats, we should double check the
// sizes since not all formats work in all sizes.
chosen = checkForVideoSizes(tracks[i].getFormat(),
supported[0]);
} else
chosen = supported[0];
tracks[i].setFormat(chosen);
System.err.println("Track " + i + " is set to transmit as:");
System.err.println(" " + chosen);
atLeastOneTrack = true;
} else
tracks[i].setEnabled(false);
} else
tracks[i].setEnabled(false);
if (!atLeastOneTrack)
return "Couldn't set any of the tracks to a valid RTP format";
// Realize the processor. This will internally create a flow
// graph and attempt to create an output datasource for JPEG/RTP
// audio frames.
result = waitForState(processor, Controller.Realized);
if (result == false)
return "Couldn't realize processor";
// Set the JPEG quality to .5.
setJPEGQuality(processor, 0.5f);
// Get the output data source of the processor
dataOutput = processor.getDataOutput();
return null;
static SessionAddress destAddr1, destAddr2;
* For JPEG and H263, we know that they only work for particular
* sizes. So we'll perform extra checking here to make sure they
* are of the right sizes.
Format checkForVideoSizes(Format original, Format supported) {
int width, height;
Dimension size = ((VideoFormat)original).getSize();
Format jpegFmt = new Format(VideoFormat.JPEG_RTP);
Format h263Fmt = new Format(VideoFormat.H263_RTP);
if (supported.matches(jpegFmt)) {
// For JPEG, make sure width and height are divisible by 8.
width = (size.width % 8 == 0 ? size.width :
(int)(size.width / 8) * 8);
height = (size.height % 8 == 0 ? size.height :
(int)(size.height / 8) * 8);
} else if (supported.matches(h263Fmt)) {
// For H.263, we only support some specific sizes.
if (size.width < 128) {
width = 128;
height = 96;
} else if (size.width < 176) {
width = 176;
height = 144;
} else {
width = 352;
height = 288;
} else {
// We don't know this particular format. We'll just
// leave it alone then.
return supported;
return (new VideoFormat(null,
new Dimension(width, height),
Format.NOT_SPECIFIED,
null,
Format.NOT_SPECIFIED)).intersects(supported);
* Setting the encoding quality to the specified value on the JPEG encoder.
* 0.5 is a good default.
void setJPEGQuality(Player p, float val) {
Control cs[] = p.getControls();
QualityControl qc = null;
VideoFormat jpegFmt = new VideoFormat(VideoFormat.JPEG);
// Loop through the controls to find the Quality control for
// the JPEG encoder.
for (int i = 0; i < cs.length; i++) {
if (cs[i] instanceof QualityControl &&
cs[i] instanceof Owned) {
Object owner = ((Owned)cs[i]).getOwner();
// Check to see if the owner is a Codec.
// Then check for the output format.
if (owner instanceof Codec) {
Format fmts[] = ((Codec)owner).getSupportedOutputFormats(null);
for (int j = 0; j < fmts.length; j++) {
if (fmts[j].matches(jpegFmt)) {
qc = (QualityControl)cs[i];
qc.setQuality(val);
System.err.println("- Setting quality to " +
val + " on " + qc);
break;
if (qc != null)
break;
* Convenience methods to handle processor's state changes.
private Integer stateLock = new Integer(0);
private boolean failed = false;
Integer getStateLock() {
return stateLock;
void setFailed() {
failed = true;
private synchronized boolean waitForState(Processor p, int state) {
p.addControllerListener(new StateListener());
failed = false;
// Call the required method on the processor
if (state == Processor.Configured) {
p.configure();
} else if (state == Processor.Realized) {
p.realize();
// Wait until we get an event that confirms the
// success of the method, or a failure event.
// See StateListener inner class
while (p.getState() < state && !failed) {
synchronized (getStateLock()) {
try {
getStateLock().wait();
} catch (InterruptedException ie) {
return false;
if (failed)
return false;
else
return true;
* Inner Classes
class StateListener implements ControllerListener {
public void controllerUpdate(ControllerEvent ce) {
// If there was an error during configure or
// realizI do this all the time, I put my MBP to a 60 inch Sharp. If you have the video working do the simple thing first. Check to make sure your sound is on your TV and Mac. Then if that doesn't work go to System Prefrences and under sound go to a tab called Output and see if your TV is listed and if it is change it to that setting
Hope It Works -
Using Swing as interface to a dll
I am trying to use Swing as my cross platform GUI for c++ dll's. Each dll has its own GUI. However, one of my dll's controls what other dlls are loaded. This works fine until I try to load a second instance of the control dll. I get an access violation message when I try to update my gui. If I try to load the two dlls from the c++ everything works fine, but if I load one from the Java GUI I get an null access exception. I'm guessing its caused by one of two problems:
1) The DLL loading is trashing the executing stack of either the JAVA or the native code.
2) As the code returns from the constructor call to the newly loaded dll JNI is deleting the interface objects that it is creating on the heap.
Any ideas would be greatly appreciated.
Unfortunately I don't get an error log from JAVA.
VisualStudio gives me:
Unhandled exception at 0x10014a7d (nativedll.dll) in testjava.exe: 0xC0000005: Access violation reading location 0xfeeefef6.
The print out reads:
Creating Java VM
No. Created VMs 0
Creating Frame
Created frame
Begin master update loop
Calling Update
Updated Frame 0
Creating Java VM
No. Created VMs 1
Creating Frame
Created frame
Calling Update
I am using Visual Studio .Net 2003 and jdk 1.4.4, 1.5.0_08 and 1.6.0.
Main application:
#include "Windows.h"
#include "nativelibrary.h"
#include <stdlib.h>
#include <string.h>
#include "jni.h"
int main(int argc, char* argv[])
//Load first library
HMODULE handle = LoadLibrary( "../../nativedll/debug/nativedll.dll");
nativelibrary* (*funcPtr)();
funcPtr = (nativelibrary*(*)())GetProcAddress( handle, "createObj");
nativelibrary* newObj = (*funcPtr)();
// update each library
for (int i = 0; i < 10000; i++)
printf ("Begin master update loop\n");
void (*funcPtr2)();
funcPtr2 = (void(*)())GetProcAddress( handle, "update");
(*funcPtr2)();
printf ("End master update loop\n");
Sleep(10);
// Sleep(100000);
return 0;
}Main Library
#include <iostream>
#include "jni.h"
#include "MyFrame.h"
#include "StaticFunc.h"
#include <stdlib.h>
#include <vector>
#include "Windows.h"
using namespace std;
class nativelibrary
public:
JavaVM *jvm;
JNIEnv *env;
jclass cls;
jobject myFrame;
nativelibrary();
void locupdate();
static vector<nativelibrary*> objects;
vector<nativelibrary*> nativelibrary::objects;
nativelibrary* createObj()
return new nativelibrary();
nativelibrary::nativelibrary()
// JavaVMOption options[0];
JavaVMInitArgs vm_args;
memset(&vm_args, 0, sizeof(vm_args));
vm_args.version = JNI_VERSION_1_4;
vm_args.nOptions = 0;
vm_args.ignoreUnrecognized = true;
vm_args.nOptions = 0;
// vm_args.options = options;
JavaVM** jvmBuf = (JavaVM**)malloc(sizeof(JavaVM*));
jsize buflen = 1;
jsize nVMs =0;
// vm_args.options[0].optionString = "-Djava.class.path=../../bin/Debug";
// Create the Java VM
printf("Creating Java VM\n");
jint res = JNI_GetCreatedJavaVMs(jvmBuf, buflen, &nVMs);
if ( res >= 0)
printf("No. Created VMs %i\n", nVMs);
if ( nVMs > 0)
jvm = jvmBuf[0];
res = jvm->GetEnv((void**)&env,vm_args.version);
else
res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
else
res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
cls = env->FindClass("LMyFrame;");
if ( cls == 0 ) printf("Cannot find MyFrame");
jmethodID mid = env->GetMethodID(cls, "<init>", "()V");
if ( mid == 0 ) printf("Cannot find constructor");
printf("Creating Frame\n");
myFrame = env->NewObject(cls, mid);
if (env->ExceptionOccurred())
env->ExceptionDescribe();
printf("Created frame\n");
objects.push_back(this);
void nativelibrary::locupdate()
printf("Calling Update\n");
jmethodID updatemid = env->GetMethodID(cls, "update", "()V");
if ( updatemid == 0 ) printf("Cannot find update");
env->CallVoidMethod(myFrame, updatemid);
if (env->ExceptionOccurred())
env->ExceptionDescribe();
void update()
vector<nativelibrary*>::iterator it = nativelibrary::objects.begin();
while (it != nativelibrary::objects.end())
nativelibrary* lib = *it;
lib->locupdate();
it++;
JNIEXPORT void JNICALL Java_MyFrame__1createObj
(JNIEnv *, jclass)
createObj();
}Java Class (User interface)
class MyFrame
static native void _createObj();
static int creations = 0;
int framenum;
MyFrame()
System.loadLibrary("../../nativedll/Debug/nativedll");
framenum = creations++;
void update()
System.out.println("Updated Frame " + framenum);
if ( creations == 1)
// load dll as a result of the user clicking on the interface
createObj();
public static void createObj()
_createObj();
}I am trying to use Swing as my cross platform GUI for c++ dll's. Each dll has its own GUI. However, one of my dll's controls what other dlls are loaded. This works fine until I try to load a second instance of the control dll. I get an access violation message when I try to update my gui. If I try to load the two dlls from the c++ everything works fine, but if I load one from the Java GUI I get an null access exception. I'm guessing its caused by one of two problems:
1) The DLL loading is trashing the executing stack of either the JAVA or the native code.
2) As the code returns from the constructor call to the newly loaded dll JNI is deleting the interface objects that it is creating on the heap.
Any ideas would be greatly appreciated.
Unfortunately I don't get an error log from JAVA.
VisualStudio gives me:
Unhandled exception at 0x10014a7d (nativedll.dll) in testjava.exe: 0xC0000005: Access violation reading location 0xfeeefef6.
The print out reads:
Creating Java VM
No. Created VMs 0
Creating Frame
Created frame
Begin master update loop
Calling Update
Updated Frame 0
Creating Java VM
No. Created VMs 1
Creating Frame
Created frame
Calling Update
I am using Visual Studio .Net 2003 and jdk 1.4.4, 1.5.0_08 and 1.6.0.
Main application:
#include "Windows.h"
#include "nativelibrary.h"
#include <stdlib.h>
#include <string.h>
#include "jni.h"
int main(int argc, char* argv[])
//Load first library
HMODULE handle = LoadLibrary( "../../nativedll/debug/nativedll.dll");
nativelibrary* (*funcPtr)();
funcPtr = (nativelibrary*(*)())GetProcAddress( handle, "createObj");
nativelibrary* newObj = (*funcPtr)();
// update each library
for (int i = 0; i < 10000; i++)
printf ("Begin master update loop\n");
void (*funcPtr2)();
funcPtr2 = (void(*)())GetProcAddress( handle, "update");
(*funcPtr2)();
printf ("End master update loop\n");
Sleep(10);
// Sleep(100000);
return 0;
}Main Library
#include <iostream>
#include "jni.h"
#include "MyFrame.h"
#include "StaticFunc.h"
#include <stdlib.h>
#include <vector>
#include "Windows.h"
using namespace std;
class nativelibrary
public:
JavaVM *jvm;
JNIEnv *env;
jclass cls;
jobject myFrame;
nativelibrary();
void locupdate();
static vector<nativelibrary*> objects;
vector<nativelibrary*> nativelibrary::objects;
nativelibrary* createObj()
return new nativelibrary();
nativelibrary::nativelibrary()
// JavaVMOption options[0];
JavaVMInitArgs vm_args;
memset(&vm_args, 0, sizeof(vm_args));
vm_args.version = JNI_VERSION_1_4;
vm_args.nOptions = 0;
vm_args.ignoreUnrecognized = true;
vm_args.nOptions = 0;
// vm_args.options = options;
JavaVM** jvmBuf = (JavaVM**)malloc(sizeof(JavaVM*));
jsize buflen = 1;
jsize nVMs =0;
// vm_args.options[0].optionString = "-Djava.class.path=../../bin/Debug";
// Create the Java VM
printf("Creating Java VM\n");
jint res = JNI_GetCreatedJavaVMs(jvmBuf, buflen, &nVMs);
if ( res >= 0)
printf("No. Created VMs %i\n", nVMs);
if ( nVMs > 0)
jvm = jvmBuf[0];
res = jvm->GetEnv((void**)&env,vm_args.version);
else
res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
else
res = JNI_CreateJavaVM(&jvm,(void**)&env,&vm_args);
cls = env->FindClass("LMyFrame;");
if ( cls == 0 ) printf("Cannot find MyFrame");
jmethodID mid = env->GetMethodID(cls, "<init>", "()V");
if ( mid == 0 ) printf("Cannot find constructor");
printf("Creating Frame\n");
myFrame = env->NewObject(cls, mid);
if (env->ExceptionOccurred())
env->ExceptionDescribe();
printf("Created frame\n");
objects.push_back(this);
void nativelibrary::locupdate()
printf("Calling Update\n");
jmethodID updatemid = env->GetMethodID(cls, "update", "()V");
if ( updatemid == 0 ) printf("Cannot find update");
env->CallVoidMethod(myFrame, updatemid);
if (env->ExceptionOccurred())
env->ExceptionDescribe();
void update()
vector<nativelibrary*>::iterator it = nativelibrary::objects.begin();
while (it != nativelibrary::objects.end())
nativelibrary* lib = *it;
lib->locupdate();
it++;
JNIEXPORT void JNICALL Java_MyFrame__1createObj
(JNIEnv *, jclass)
createObj();
}Java Class (User interface)
class MyFrame
static native void _createObj();
static int creations = 0;
int framenum;
MyFrame()
System.loadLibrary("../../nativedll/Debug/nativedll");
framenum = creations++;
void update()
System.out.println("Updated Frame " + framenum);
if ( creations == 1)
// load dll as a result of the user clicking on the interface
createObj();
public static void createObj()
_createObj();
} -
How to use Call library function node for a function in dll with VOID data type
Hi All,
I would like to ask for your kind help,
I am facing an issue with the call library node.
I have a C++ function(stdcall), which has void as data type
error code XXXX(hwnd, lID, getValue, *void data1, *void data2)
the data1 and data2 types are always changing depending upoin the value of "getValue".
Primarily i can use call library node multiple times and adapt each node according to the data types of data1 and data2, and extract the values and use in the code. Here is no issue. Real question is:
My question:
How can i just use one time call library node and make a case depending upon the "getvalue", which will control the data type of data1 and data2. Here i really looking for solutions.
My trials:
i used varaints as input to the call libray node for data1 and data2, and selected Parameters in call libraby node as " Adapt to type". here labview just crashed.
i really appreciate your feedbackand suggestions.
Thanks
Kutbuddin
Solved!
Go to Solution.
Attachments:
Clipboard02.jpg 103 KBA variant is a very specific LabVIEW datatype (really a C++ type object internally) and trying to pass that to a function, which excepts a flat memory pointer there, for sure will crash very quickly.
As to endianess, yes Unflatten will be able to adjust for endianess, which in this case however is most likely exectly NOT what you want. So make sure that the you select native type for the endianess input on Unflatten from String. LabVIEW internally works with whatever is the native endianess, as will most likely your C++ DLL. The platform independent big endian format does only come into play when you receive data streams over some streaming interface like a network connection. Here it is desirable to use an endian format that is independent from the actual platform that generates and consumes the data stream. LabVIEWs default endianes is big endian here.
But as long as you pass data directly to native components like DLLs there is no difference in endianess between what LabVIEW uses and what those components use.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions -
Hello,
I haven't been programming in JAVA for very long, just over a month. I understand that intefaces are just method signatures and variables that can be used by a class wich implements them and redefines the methods and/or variables. I know that much.. I think.
My Question:
I want to use the Action interface for multiple buttons, I just don't know exactly how. dubwai, is the one who suggested the concept to me. Does anyone have any implementation or code wich utilizes the Action interface?
Thanks very much,
BruceWhat you need to do is write a class that extends AbstractAction. I did one for a FileAction class. I have included the code for this below as a reference:
class FileAction extends AbstractAction
// Handles file actions
FileAction(String name)
//Constructor
super(name);
String iconFileName = "images/" + name + ".gif";
if(new File(iconFileName).exists())
putValue(SMALL_ICON, new ImageIcon(iconFileName));
FileAction(String name, String tooltip)
//Constructor
this(name); // Call the other constructor
if(tooltip != null) // If there is tooltip text...
putValue(SHORT_DESCRIPTION, tooltip); // store it.
public void actionPerformed(ActionEvent e)
String name = (String)getValue(NAME);
if(name.equals(saveAction.getValue(NAME)))
// code to handle file Save operation
saveOperation();
else if(name.equals(saveAsAction.getValue(NAME)))
// code to handle file Save As operation
File file = showDialog(
"Save Sketch As",
"Save",
"Save the Sketch",
's',
modelFile == null ? new File(files.getCurrentDirectory(), filename) : modelFile);
if (file != null)
if (file.exists() && ! file.equals(modelFile))
if (JOptionPane.NO_OPTION == //Overwrite warning
JOptionPane.showConfirmDialog(
SketchFrame.this,
file.getName() + " exists. Overwrite?",
"Confirm Save As",
JOptionPane.YES_NO_OPTION,
JOptionPane.WARNING_MESSAGE))
return; // no file selected
saveSketch(file);
return;
else if(name.equals(openAction.getValue(NAME)))
// code to handle file Open operation
checkForSave();
File file = showDialog("Open Sketch File", // dialog window title
"Open", // button lable
"Read a sketch from a file", // button tooltip text
'o', // shortcut character
null); // no file selected
if (file != null) // if a file was selected
openSketch(file); // then read it
else if(name.equals(newAction.getValue(NAME)))
// code to handle file New operation
checkForSave();
theApp.insertModel(new SketchModel()); // insert new empty sketch
modelFile = null; // no file for it
filename = DEFAULT_FILENAME; // default name
setTitle(frameTitle
+ files.getCurrentDirectory()
+ "\\"
+ filename);
sketchChanged = false; // not changed yet
else if(name.equals(exitAction.getValue(NAME)))
// code to handle file Exit operation
checkForSave();
System.exit(0);
else if(name.equals(printAction.getValue(NAME)))
// code to handle file Print operation
PrinterJob printJob = PrinterJob.getPrinterJob(); // get a printing object
printJob.setPageable(theApp.getView()); // the view is the page source
if(printJob.printDialog()) // display print dialog
try
printJob.print(); // then print
catch(PrinterException pe)
System.out.println(pe);
JOptionPane.showMessageDialog(SketchFrame.this,
"Error printing a sketch.",
"Printer Error",
JOptionPane.ERROR_MESSAGE);
}The good thing about Actions is that you can put them in a menu or on a toolbar using the same code.
Garry.
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