How do I made "Shareware" in Java?

Say I'd love to offer up a jar file that contains a component as shareware and give it a certain amount of time to be used (eg 30 days). How can I do this?
Also, how could a person go about limiting the number of processors that a component is run on? Is that feasable?
Thanks a lot!
Eddie

It doesn't directly address the issue of time-limits,
but it does emphasize that it's more or less
impossible to hide your source code in Java... so if
someone didn't like your time limit, they could simply
extract the byte-code and use an obfuscator to create
the source code. Make it a Java Web Start application.
Sign it to prevent messing with the jars.
Enforce contacts to the server everytime the app is started up from the JWS cache by not providing the offline-allowed tag in the JNLP description.
Better implement some live data exchange (e.g. by a challenge transmitted via a socket) to make sure
the client has to contact the server at start up.
Keep track at the server side how many clients
are active.
This will provide most of what you ask, however
it will require a internet connection.
If this is not possible, you would have to emulate a Java Web Start system yourself, but that relies on different 'heartbeat' transmissions, like email sent or disks exchanged or whatever means of contact between you and the deployed client app is possible.
Make use of signed jar to keep integrity.
Make use of byte code obfuscators to prevent
reengineering that might disable security checking,
if you have to fear more than average efforts to
break your scheme.
After all there is no complete security, you can only make it more or less effort needing.
You must decide what level is ok for you.
Regards,
Marc

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/** The com.apple.MacOS.MacOSError class */
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/** The com.apple.MacOS.AEDesc class */
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/** The <init>(String) method of com.apple.MacOS.AEDesc */
private static Constructor aeDescConstructor;
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/** The getFileType method of com.apple.mrj.MRJOSType */
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* The file type of the Finder on a Macintosh. Hardcoding "Finder" would keep non-U.S. English
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* The creator code of the Finder on a Macintosh, which is needed to send AppleEvents to the
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/** The name for the AppleEvent type corresponding to a GetURL event. */
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private static String errorMessage;
* An initialization block that determines the operating system and loads the necessary
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static
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String majorMRJVersion = mrjVersion.substring(0, 3);
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if (version == 2)
jvm = MRJ_2_0;
else if (version >= 2.1)
// For the time being, assume that all post-2.0 versions of MRJ work the same
jvm = MRJ_2_1;
else
loadedWithoutErrors = false;
errorMessage = "Unsupported MRJ version: " + version;
catch (NumberFormatException nfe)
loadedWithoutErrors = false;
errorMessage = "Invalid MRJ version: " + mrjVersion;
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jvm = WINDOWS_9x;
else
jvm = WINDOWS_NT;
else
jvm = OTHER;
if (loadedWithoutErrors)
{ // if we haven't hit any errors yet
loadedWithoutErrors = loadClasses();
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BrowserLauncher()
* Called by a static initializer to load any classes, fields, and methods required at runtime
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private static boolean loadClasses()
switch (jvm)
case MRJ_2_0:
try
Class aeTargetClass = Class.forName("com.apple.MacOS.AETarget");
macOSErrorClass = Class.forName("com.apple.MacOS.MacOSError");
Class osUtilsClass = Class.forName("com.apple.MacOS.OSUtils");
Class appleEventClass = Class.forName("com.apple.MacOS.AppleEvent");
Class aeClass = Class.forName("com.apple.MacOS.ae");
aeDescClass = Class.forName("com.apple.MacOS.AEDesc");
aeTargetConstructor =
aeTargetClass.getDeclaredConstructor(
new Class []{ int.class });
appleEventConstructor =
appleEventClass.getDeclaredConstructor(
new Class[]{ int.class, int.class,
aeTargetClass, int.class, int.class });
aeDescConstructor = aeDescClass.getDeclaredConstructor(
new Class[]{ String.class });
makeOSType =
osUtilsClass.getDeclaredMethod("makeOSType",
new Class []{ String.class });
putParameter =
appleEventClass.getDeclaredMethod("putParameter",
new Class[]{ int.class, aeDescClass });
sendNoReply =
appleEventClass.getDeclaredMethod("sendNoReply",
new Class[]{ });
Field keyDirectObjectField =
aeClass.getDeclaredField("keyDirectObject");
keyDirectObject =
(Integer) keyDirectObjectField.get(null);
Field autoGenerateReturnIDField =
appleEventClass.getDeclaredField("kAutoGenerateReturnID");
kAutoGenerateReturnID =
(Integer) autoGenerateReturnIDField.get(null);
Field anyTransactionIDField =
appleEventClass.getDeclaredField("kAnyTransactionID");
kAnyTransactionID =
(Integer) anyTransactionIDField.get(null);
catch (ClassNotFoundException cnfe)
errorMessage = cnfe.getMessage();
return false;
catch (NoSuchMethodException nsme)
errorMessage = nsme.getMessage();
return false;
catch (NoSuchFieldException nsfe)
errorMessage = nsfe.getMessage();
return false;
catch (IllegalAccessException iae)
errorMessage = iae.getMessage();
return false;
break;
case MRJ_2_1:
try
mrjFileUtilsClass = Class.forName("com.apple.mrj.MRJFileUtils");
mrjOSTypeClass = Class.forName("com.apple.mrj.MRJOSType");
Field systemFolderField =
mrjFileUtilsClass.getDeclaredField("kSystemFolderType");
kSystemFolderType = systemFolderField.get(null);
findFolder =
mrjFileUtilsClass.getDeclaredMethod("findFolder",
new Class[]{ mrjOSTypeClass });
getFileType =
mrjFileUtilsClass.getDeclaredMethod("getFileType",
new Class[]{ File.class });
catch (ClassNotFoundException cnfe)
errorMessage = cnfe.getMessage();
return false;
catch (NoSuchFieldException nsfe)
errorMessage = nsfe.getMessage();
return false;
catch (NoSuchMethodException nsme)
errorMessage = nsme.getMessage();
return false;
catch (SecurityException se)
errorMessage = se.getMessage();
return false;
catch (IllegalAccessException iae)
errorMessage = iae.getMessage();
return false;
break;
return true;
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if (browser != null)
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switch (jvm)
case MRJ_2_0:
try
Integer finderCreatorCode =
(Integer) makeOSType.invoke(null,
new Object[]{ FINDER_CREATOR });
Object aeTarget = aeTargetConstructor.newInstance(
new Object[]{ finderCreatorCode });
Integer gurlType = (Integer) makeOSType.invoke(null,
new Object[]{ GURL_EVENT });
Object appleEvent = appleEventConstructor.newInstance(
new Object[]{ gurlType, gurlType, aeTarget,
kAutoGenerateReturnID, kAnyTransactionID });
// Don't set browser = appleEvent because then the next time we call
// locateBrowser(), we'll get the same AppleEvent, to which we'll already have
// added the relevant parameter. Instead, regenerate the AppleEvent every time.
// There's probably a way to do this better; if any has any ideas, please let
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return appleEvent;
catch (IllegalAccessException iae)
browser = null;
errorMessage = iae.getMessage();
return browser;
catch (InstantiationException ie)
browser = null;
errorMessage = ie.getMessage();
return browser;
catch (InvocationTargetException ite)
browser = null;
errorMessage = ite.getMessage();
return browser;
case MRJ_2_1:
File systemFolder;
try
systemFolder = (File) findFolder.invoke(null,
new Object[]{ kSystemFolderType });
catch (IllegalArgumentException iare)
browser = null;
errorMessage = iare.getMessage();
return browser;
catch (IllegalAccessException iae)
browser = null;
errorMessage = iae.getMessage();
return browser;
catch (InvocationTargetException ite)
browser = null;
errorMessage = ite.getTargetException().getClass() +
": " + ite.getTargetException().getMessage();
return browser;
String[] systemFolderFiles = systemFolder.list();
// Avoid a FilenameFilter because that can't be stopped mid-list
for (int i = 0; i < systemFolderFiles.length; i++)
try
File file = new File(systemFolder,
systemFolderFiles);
if (!file.isFile())
continue;
Object fileType = getFileType.invoke(null,
new Object[]{ file });
if (FINDER_TYPE.equals(fileType.toString()))
browser = file.toString(); // Actually the Finder, but that's OK
return browser;
catch (IllegalArgumentException iare)
browser = browser;
errorMessage = iare.getMessage();
return null;
catch (IllegalAccessException iae)
browser = null;
errorMessage = iae.getMessage();
return browser;
catch (InvocationTargetException ite)
browser = null;
errorMessage = ite.getTargetException().getClass() +
": " + ite.getTargetException().
getMessage();
return browser;
browser = null;
break;
case WINDOWS_NT:
browser = "cmd.exe";
break;
case WINDOWS_9x:
browser = "command.com";
break;
case OTHER: //fall through
default:
browser = "netscape";
break;
return browser;
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* @param url The URL to open
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public static void openURL(String url) throws IOException
if (!loadedWithoutErrors)
throw new IOException("Exception in finding browser: " +
errorMessage);
Object browser = locateBrowser();
if (browser == null)
throw new IOException("Unable to locate browser: " +
errorMessage);
switch (jvm)
case MRJ_2_0:
Object aeDesc = null;
try
aeDesc = aeDescConstructor.newInstance(
new Object[]{ url });
putParameter.invoke(browser,
new Object[]{ keyDirectObject, aeDesc });
sendNoReply.invoke(browser, new Object[]{ });
catch (InvocationTargetException ite)
throw new IOException(
"InvocationTargetException while creating AEDesc: " +
ite.getMessage());
catch (IllegalAccessException iae)
throw new IOException(
"IllegalAccessException while building AppleEvent: " +
iae.getMessage());
catch (InstantiationException ie)
throw new IOException(
"InstantiationException while creating AEDesc: " +
ie.getMessage());
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browser = null; // Ditto
} break;
case MRJ_2_1:
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new String[]{ (String) browser, url });
break;
case WINDOWS_NT://fall through
case WINDOWS_9x:
Runtime.getRuntime().exec( new String[]{ (String) browser,
FIRST_WINDOWS_PARAMETER,
SECOND_WINDOWS_PARAMETER, url });
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Runtime.getRuntime().exec((String) browser +
NETSCAPE_OPEN_PARAMETER_START + url +
NETSCAPE_OPEN_PARAMETER_END);
try
int exitCode = process.waitFor();
if (exitCode != 0)
{ // if Netscape was not open
Runtime.getRuntime().exec(
new String[]{ (String) browser, url });
catch (InterruptedException ie)
throw new IOException(
"InterruptedException while launching browser: " +
ie.getMessage());
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new String[]{ (String) browser, url });
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* There are certain system requirements for this class, as it's running through Runtime.exec(),
* which is Java's way of making a native system call. Currently, this requires that a Macintosh
* have a Finder which supports the GURL event, which is true for Mac OS 8.0 and 8.1 systems that
* have the Internet Scripting AppleScript dictionary installed in the Scripting Additions folder
* in the Extensions folder (which is installed by default as far as I know under Mac OS 8.0 and
* 8.1), and for all Mac OS 8.5 and later systems. On Windows, it only runs under Win32 systems
* (Windows 95, 98, and NT 4.0, as well as later versions of all). On other systems, this drops
* back from the inherently platform-sensitive concept of a default browser and simply attempts
* to launch Netscape via a shell command.
* This code is Copyright 1999 by Eric Albert ([email protected]) and may be redistributed
* or modified in any form without restrictions as long as the portion of this comment from this
* paragraph through the end of the comment is not removed. The author requests that he be
* notified of any application, applet, or other binary that makes use of this code, but that's
* more out of curiosity than anything and is not required. This software includes no warranty.
public class BrowserLauncher {
* The Java virtual machine that we are running on. Actually, in most cases we only care
* about the operating system, but some operating systems require us to switch on the VM.
private static int jvm; /** The browser for the system */
private static Object browser;
* Caches whether any classes, methods, and fields that are not part of the JDK and need to
* be dynamically loaded at runtime loaded successfully.
* Note that if this is <code>false</code>, <code>openURL()</code> will always return an
* IOException.
private static boolean loadedWithoutErrors; /** The com.apple.mrj.MRJFileUtils class */
private static Class mrjFileUtilsClass; /** The com.apple.mrj.MRJOSType class */
private static Class mrjOSTypeClass; /** The com.apple.MacOS.MacOSError class */
private static Class macOSErrorClass; /** The com.apple.MacOS.AEDesc class */
private static Class aeDescClass; /** The <init>(int) method of com.apple.MacOS.AETarget */
private static Constructor aeTargetConstructor; /** The <init>(int, int, int) method of com.apple.MacOS.AppleEvent */
private static Constructor appleEventConstructor; /** The <init>(String) method of com.apple.MacOS.AEDesc */
private static Constructor aeDescConstructor; /** The findFolder method of com.apple.mrj.MRJFileUtils */
private static Method findFolder; /** The getFileType method of com.apple.mrj.MRJOSType */
private static Method getFileType; /** The makeOSType method of com.apple.MacOS.OSUtils */
private static Method makeOSType; /** The putParameter method of com.apple.MacOS.AppleEvent */
private static Method putParameter; /** The sendNoReply method of com.apple.MacOS.AppleEvent */
private static Method sendNoReply; /** Actually an MRJOSType pointing to the System Folder on a Macintosh */
private static Object kSystemFolderType; /** The keyDirectObject AppleEvent parameter type */
private static Integer keyDirectObject; /** The kAutoGenerateReturnID AppleEvent code */
private static Integer kAutoGenerateReturnID; /** The kAnyTransactionID AppleEvent code */
private static Integer kAnyTransactionID; /** JVM constant for MRJ 2.0 */
private static final int MRJ_2_0 = 0; /** JVM constant for MRJ 2.1 or later */
private static final int MRJ_2_1 = 1; /** JVM constant for any Windows 9x JVM */
private static final int WINDOWS_9x = 2; /** JVM constant for any Windows NT JVM */
private static final int WINDOWS_NT = 3; /** JVM constant for any other platform */
private static final int OTHER = -1; /** * The file type of the Finder on a Macintosh. Hardcoding "Finder" would keep non-U.S. English * systems from working properly. */
private static final String FINDER_TYPE = "FNDR"; /** * The creator code of the Finder on a Macintosh, which is needed to send AppleEvents to the * application. */
private static final String FINDER_CREATOR = "MACS"; /** The name for the AppleEvent type corresponding to a GetURL event. */
private static final String GURL_EVENT = "GURL"; /** * The first parameter that needs to be passed into Runtime.exec() to open the default web * browser on Windows. */
private static final String FIRST_WINDOWS_PARAMETER = "/c"; /** The second parameter for Runtime.exec() on Windows. */
private static final String SECOND_WINDOWS_PARAMETER = "start";
* The shell parameters for Netscape that opens a given URL in an already-open copy of Netscape
* on many command-line systems.
private static final String NETSCAPE_OPEN_PARAMETER_START = " -remote openURL(";
private static final String NETSCAPE_OPEN_PARAMETER_END = ")"; /** * The message from any exception thrown throughout the initialization process. */
private static String errorMessage; /** * An initialization block that determines the operating system and loads the necessary * runtime data. */
static {
loadedWithoutErrors = true;
String osName = System.getProperty("os.name");
if ("Mac OS".equals(osName)) {
String mrjVersion = System.getProperty("mrj.version");
String majorMRJVersion = mrjVersion.substring(0, 3);
try {
double version = Double.valueOf(majorMRJVersion).doubleValue();
if (version == 2) {
jvm = MRJ_2_0;
} else if (version >= 2.1) { // For the time being, assume that all post-2.0 versions of MRJ work the same
jvm = MRJ_2_1;
} else {
loadedWithoutErrors = false;
errorMessage = "Unsupported MRJ version: " + version;
} catch (NumberFormatException nfe) {
loadedWithoutErrors = false;
errorMessage = "Invalid MRJ version: " + mrjVersion;
} else if (osName.startsWith("Windows")) { //still needs verification against Win2K
if (osName.indexOf("9") != -1) {
jvm = WINDOWS_9x;
} else {
jvm = WINDOWS_NT;
} else {
jvm = OTHER;
if (loadedWithoutErrors) { // if we haven't hit any errors yet
loadedWithoutErrors = loadClasses();
} /** * This class should be never be instantiated; this just ensures so. */
BrowserLauncher() { }
* Called by a static initializer to load any classes, fields, and methods required at runtime * to locate the user's web browser.
* @return <code>true</code> if all intialization succeeded * <code>false</code> if any portion of the initialization failed */
private static boolean loadClasses() {
switch (jvm) {
case MRJ_2_0:
try {
Class aeTargetClass = Class.forName("com.apple.MacOS.AETarget");
macOSErrorClass = Class.forName("com.apple.MacOS.MacOSError");
Class osUtilsClass = Class.forName("com.apple.MacOS.OSUtils");
Class appleEventClass = Class.forName("com.apple.MacOS.AppleEvent");
Class aeClass = Class.forName("com.apple.MacOS.ae");
aeDescClass = Class.forName("com.apple.MacOS.AEDesc");
aeTargetConstructor = aeTargetClass.getDeclaredConstructor( new Class []{ int.class });
appleEventConstructor = appleEventClass.getDeclaredConstructor( new Class[]{ int.class, int.class, aeTargetClass, int.class, int.class });
aeDescConstructor = aeDescClass.getDeclaredConstructor( new Class[]{ String.class });
makeOSType = osUtilsClass.getDeclaredMethod("makeOSType", new Class []{ String.class });
putParameter = appleEventClass.getDeclaredMethod("putParameter", new Class[]{ int.class, aeDescClass });
sendNoReply = appleEventClass.getDeclaredMethod("sendNoReply", new Class[]{ });
Field keyDirectObjectField = aeClass.getDeclaredField("keyDirectObject");
keyDirectObject = (Integer) keyDirectObjectField.get(null);
Field autoGenerateReturnIDField = appleEventClass.getDeclaredField("kAutoGenerateReturnID");
kAutoGenerateReturnID = (Integer) autoGenerateReturnIDField.get(null);
Field anyTransactionIDField = appleEventClass.getDeclaredField("kAnyTransactionID");
kAnyTransactionID = (Integer) anyTransactionIDField.get(null);
} catch (ClassNotFoundException cnfe) {
errorMessage = cnfe.getMessage();
return false;
} catch (NoSuchMethodException nsme) {
errorMessage = nsme.getMessage();
return false;
} catch (NoSuchFieldException nsfe) {
errorMessage = nsfe.getMessage();
return false;
} catch (IllegalAccessException iae) {
errorMessage = iae.getMessage();
return false;
} break;
case MRJ_2_1:
try {
mrjFileUtilsClass = Class.forName("com.apple.mrj.MRJFileUtils");
mrjOSTypeClass = Class.forName("com.apple.mrj.MRJOSType");
Field systemFolderField = mrjFileUtilsClass.getDeclaredField("kSystemFolderType");
kSystemFolderType = systemFolderField.get(null);
findFolder = mrjFileUtilsClass.getDeclaredMethod("findFolder", new Class[]{ mrjOSTypeClass });
getFileType = mrjFileUtilsClass.getDeclaredMethod("getFileType", new Class[]{ File.class });
} catch (ClassNotFoundException cnfe) {
errorMessage = cnfe.getMessage();
return false;
} catch (NoSuchFieldException nsfe) {
errorMessage = nsfe.getMessage();
return false;
} catch (NoSuchMethodException nsme) {
errorMessage = nsme.getMessage();
return false;
} catch (SecurityException se) {
errorMessage = se.getMessage();
return false;
} catch (IllegalAccessException iae) {
errorMessage = iae.getMessage();
return false;
break;
return true;
* Attempts to locate the default web browser on the local system. Caches results so it
* only locates the browser once for each use of this class per JVM instance.
* @return The browser for the system. Note that this may not be what you would consider
* to be a standard web browser; instead, it's the application that gets called to
* open the default web browser. In some cases, this will be a non-String object
* that provides the means of calling the default browser.
private static Object locateBrowser() {
if (browser != null) {
return browser;
switch (jvm) {
case MRJ_2_0:
try {
Integer finderCreatorCode = (Integer) makeOSType.invoke(null, new Object[]{ FINDER_CREATOR });
Object aeTarget = aeTargetConstructor.newInstance( new Object[]{ finderCreatorCode });
Integer gurlType = (Integer) makeOSType.invoke(null, new Object[]{ GURL_EVENT });
Object appleEvent = appleEventConstructor.newInstance( new Object[]{ gurlType, gurlType, aeTarget, kAutoGenerateReturnID, kAnyTransactionID });
// Don't set browser = appleEvent because then the next time we call
// locateBrowser(), we'll get the same AppleEvent, to which we'll already have
// added the relevant parameter. Instead, regenerate the AppleEvent every time.
// There's probably a way to do this better; if any has any ideas, please let
// me know.
return appleEvent;
} catch (IllegalAccessException iae) {
browser = null;
errorMessage = iae.getMessage();
return browser;
} catch (InstantiationException ie) {
browser = null;
errorMessage = ie.getMessage();
return browser;
} catch (InvocationTargetException ite) {
browser = null;
errorMessage = ite.getMessage();
return browser;
case MRJ_2_1:
File systemFolder;
try {
systemFolder = (File) findFolder.invoke(null, new Object[]{ kSystemFolderType });
} catch (IllegalArgumentException iare) {
browser = null;
errorMessage = iare.getMessage();
return browser;
} catch (IllegalAccessException iae) {
browser = null;
errorMessage = iae.getMessage();
return browser;
} catch (InvocationTargetException ite) {
browser = null;
errorMessage = ite.getTargetException().getClass() + ": " + ite.getTargetException().getMessage();
return browser;
String[] systemFolderFiles = systemFolder.list();
// Avoid a FilenameFilter because that can't be stopped mid-list
for (int i = 0; i < systemFolderFiles.length; i++) {
try {
File file = new File(systemFolder, systemFolderFiles);
if (!file.isFile()) {
continue;
Object fileType = getFileType.invoke(null, new Object[]{ file });
if (FINDER_TYPE.equals(fileType.toString())) {
browser = file.toString();
// Actually the Finder, but that's OK return browser;
} catch (IllegalArgumentException iare) {
browser = browser;
errorMessage = iare.getMessage();
return null;
} catch (IllegalAccessException iae) {
browser = null;
errorMessage = iae.getMessage();
return browser;
} catch (InvocationTargetException ite) {
browser = null;
errorMessage = ite.getTargetException().getClass() + ": " + ite.getTargetException(). getMessage();
return browser;
browser = null;
break;
case WINDOWS_NT:
browser = "cmd.exe";
break;
case WINDOWS_9x:
browser = "command.com";
break;
case OTHER: //fall through
default:
browser = "netscape";
break;
return browser;
* Attempts to open the default web browser to the given URL.
* @param url The URL to open
* @throws IOException If the web browser could not be located or does not run
public static void openURL(String url) throws IOException {
if (!loadedWithoutErrors) {
throw new IOException("Exception in finding browser: " + errorMessage);
Object browser = locateBrowser();
if (browser == null) {
throw new IOException("Unable to locate browser: " + errorMessage);
switch (jvm) {
case MRJ_2_0:
Object aeDesc = null;
try {
aeDesc = aeDescConstructor.newInstance( new Object[]{ url });
putParameter.invoke(browser, new Object[]{ keyDirectObject, aeDesc });
sendNoReply.invoke(browser, new Object[]{ });
} catch (InvocationTargetException ite) {
throw new IOException( "InvocationTargetException while creating AEDesc: " + ite.getMessage());
} catch (IllegalAccessException iae) {
throw new IOException( "IllegalAccessException while building AppleEvent: " + iae.getMessage());
} catch (InstantiationException ie) {
throw new IOException( "InstantiationException while creating AEDesc: " + ie.getMessage());
} finally {
aeDesc = null; // Encourage it to get disposed if it was created
browser = null; // Ditto
} break;
case MRJ_2_1:
Runtime.getRuntime().exec( new String[]{ (String) browser, url });
break;
case WINDOWS_NT://fall through
case WINDOWS_9x:
Runtime.getRuntime().exec( new String[]{ (String) browser, FIRST_WINDOWS_PARAMETER, SECOND_WINDOWS_PARAMETER, url });
break;
case OTHER: // Assume that we're on Unix and that Netscape is installed
// First, attempt to open the URL in a currently running session of Netscape
Process process = Runtime.getRuntime().exec((String) browser + NETSCAPE_OPEN_PARAMETER_START + url + NETSCAPE_OPEN_PARAMETER_END);
try {
int exitCode = process.waitFor();
if (exitCode != 0) { // if Netscape was not open
Runtime.getRuntime().exec( new String[]{ (String) browser, url });
} catch (InterruptedException ie) {
throw new IOException( "InterruptedException while launching browser: " + ie.getMessage());
} break;
default: // This should never occur, but if it does, we'll try the simplest thing possible
Runtime.getRuntime().exec( new String[]{ (String) browser, url });
break;
// Driver to test class
public static void main(String[] args) throws IOException {
BrowserLauncher br = new BrowserLauncher();
if (args.length != 1) br.openURL("http://199.233.155.110:8080");
else br.openURL(args[0]);

How to compile and register a Java CFX tag with multiple class files?

All-
If this is the wrong forum for CFX questions, please let me
know.
I need to determine how to compile and register a Java CFX
tag that contains multiple class files. One class file implements
the CustomTag interface and the other class files implement various
supporting classes. All of the documentation that I have found
talks about using a single class file. I am assuming that a JAR
file will be involved, but I am not sure of the specifics.
Thanks in advance for your help.
-Josh

Yes, it will involve a jar. Use your java IDE (eclipse,
etcetera ..) to create a jar containing all of the classes. Check
your ide's documentation for how to create jar files. After you
have created the jar, place the jar in the CF class path so CF will
recognize it. For example the {cf_root}/WEB-INF/lib directory. CF
must be restarted before it will detect the new jar. After
restarting CF, register the CFX tag in the ColdFusion Administrator
using the name of the class that implements the CustomTag
interface.
Though it is worth noting you can also instantiate java
classes directly from ColdFusion (ie without using a CFX
tag).

How to clear the screen in java?

Hi,
How to clear the screen in java without using any loops?
Thanks

Just paint with your background color to let the old paintings vanish.

How to change system time through java program

Hi
I want to know, how to change system time through java program.
give me a idia with example.
Thanks

There isn't any core Java API for this. Use JNI or call an external process with Runtime.exec().
~

How to set proxy authentication using java properties at run time

Hi All,
How to set proxy authentication using java properties on the command line, or in Netbeans (Project => Properties
=> Run => Arguments). Below is a simple URL data extract program which works in absence of firewall:
import java.io.*;
import java.net.*;
public class DnldURLWithoutUsingProxy {
 public static void main (String[] args) {
 URL u;
 InputStream is = null;
 DataInputStream dis;
 String s;
 try {
 u = new URL("http://www.yahoo.com.au/index.html");
 is = u.openStream(); // throws an IOException
 dis = new DataInputStream(new BufferedInputStream(is));
 BufferedReader br = new BufferedReader(new InputStreamReader(dis));
 String strLine;
 //Read File Line By Line
 while ((strLine = br.readLine()) != null) {
 // Print the content on the console
 System.out.println (strLine);
 //Close the input stream
 dis.close();
 } catch (MalformedURLException mue) {
 System.out.println("Ouch - a MalformedURLException happened.");
 mue.printStackTrace();
 System.exit(1);
 } catch (IOException ioe) {
 System.out.println("Oops- an IOException happened.");
 ioe.printStackTrace();
 System.exit(1);
 } finally {
 try {
 is.close();
 } catch (IOException ioe) {
}However, it generated the following message when run behind the firewall:
cd C:\Documents and Settings\abc\DnldURL\build\classes
java -cp . DnldURLWithoutUsingProxy
Oops- an IOException happened.
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
at java.net.Socket.connect(Socket.java:452)
at java.net.Socket.connect(Socket.java:402)
at sun.net.NetworkClient.doConnect(NetworkClient.java:139)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:402)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:618)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:306)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:267)
at sun.net.www.http.HttpClient.New(HttpClient.java:339)
at sun.net.www.http.HttpClient.New(HttpClient.java:320)
at sun.net.www.http.HttpClient.New(HttpClient.java:315)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:510)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:487)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:615) at java.net.URL.openStream(URL.java:913) at DnldURLWithoutUsingProxy.main(DnldURLWithoutUsingProxy.java:17)
I have also tried the command without much luck either:
java -cp . -Dhttp.proxyHost=wwwproxy -Dhttp.proxyPort=80 DnldURLWithoutUsingProxy
Oops- an IOException happened.
java.io.IOException: Server returned HTTP response code: 407 for URL: http://www.yahoo.com.au/index.html
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1245) at java.net.URL.openStream(URL.java:1009) at DnldURLWithoutUsingProxy.main(DnldURLWithoutUsingProxy.java:17)
All outgoing traffic needs to use the proxy wwwproxy (alias to http://proxypac/proxy.pac) on port 80, where it will prompt for valid authentication before allowing to get through.
There is no problem pinging www.yahoo.com from this system.
I am running jdk1.6.0_03, Netbeans 6.0 on Windows XP platform.
I have tried Greg Sporar's Blog on setting the JVM option in Sun Java System Application Server (GlassFish) and
Java Control Panel - Use browser settings without success.
Thanks,
George

Hi All,
How to set proxy authentication using java properties on the command line, or in Netbeans (Project => Properties
=> Run => Arguments). Below is a simple URL data extract program which works in absence of firewall:
import java.io.*;
import java.net.*;
public class DnldURLWithoutUsingProxy {
 public static void main (String[] args) {
 URL u;
 InputStream is = null;
 DataInputStream dis;
 String s;
 try {
 u = new URL("http://www.yahoo.com.au/index.html");
 is = u.openStream(); // throws an IOException
 dis = new DataInputStream(new BufferedInputStream(is));
 BufferedReader br = new BufferedReader(new InputStreamReader(dis));
 String strLine;
 //Read File Line By Line
 while ((strLine = br.readLine()) != null) {
 // Print the content on the console
 System.out.println (strLine);
 //Close the input stream
 dis.close();
 } catch (MalformedURLException mue) {
 System.out.println("Ouch - a MalformedURLException happened.");
 mue.printStackTrace();
 System.exit(1);
 } catch (IOException ioe) {
 System.out.println("Oops- an IOException happened.");
 ioe.printStackTrace();
 System.exit(1);
 } finally {
 try {
 is.close();
 } catch (IOException ioe) {
}However, it generated the following message when run behind the firewall:
cd C:\Documents and Settings\abc\DnldURL\build\classes
java -cp . DnldURLWithoutUsingProxy
Oops- an IOException happened.
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:305)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:171)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:158)
at java.net.Socket.connect(Socket.java:452)
at java.net.Socket.connect(Socket.java:402)
at sun.net.NetworkClient.doConnect(NetworkClient.java:139)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:402)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:618)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:306)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:267)
at sun.net.www.http.HttpClient.New(HttpClient.java:339)
at sun.net.www.http.HttpClient.New(HttpClient.java:320)
at sun.net.www.http.HttpClient.New(HttpClient.java:315)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:510)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:487)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:615) at java.net.URL.openStream(URL.java:913) at DnldURLWithoutUsingProxy.main(DnldURLWithoutUsingProxy.java:17)
I have also tried the command without much luck either:
java -cp . -Dhttp.proxyHost=wwwproxy -Dhttp.proxyPort=80 DnldURLWithoutUsingProxy
Oops- an IOException happened.
java.io.IOException: Server returned HTTP response code: 407 for URL: http://www.yahoo.com.au/index.html
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1245) at java.net.URL.openStream(URL.java:1009) at DnldURLWithoutUsingProxy.main(DnldURLWithoutUsingProxy.java:17)
All outgoing traffic needs to use the proxy wwwproxy (alias to http://proxypac/proxy.pac) on port 80, where it will prompt for valid authentication before allowing to get through.
There is no problem pinging www.yahoo.com from this system.
I am running jdk1.6.0_03, Netbeans 6.0 on Windows XP platform.
I have tried Greg Sporar's Blog on setting the JVM option in Sun Java System Application Server (GlassFish) and
Java Control Panel - Use browser settings without success.
Thanks,
George

How to run ear file in java application server

i want how to run .ear file in java application server
1. i m created ear file
2. i m created jar file (bean,home,remote)
3.i m created war file(in the form of jsp)
but till now i couldnt run ear file
how to run
please hel me

You must create :
1.Jar file
2.War file
And then put them into an ear file
Exemple : myapp.ear contains
myappEJB.jar
myappWEB.war
META-INF/application.xml
and application.xml looks like this :
<application xmlns="http://java.sun.com/xml/ns/j2ee" version="1.4"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://java.sun.com /xml/ns/j2ee
 http://java.sun.com/xml/ns/j2ee/application_1_4.xsd">
 <display-name>myapp</display-name>
 <description>Demo application</description>
 <module>
 <ejb>myappEJB.jar</ejb>
 </module>
 <module>
 <web>
 <web-uri>myappWAR.war</web-uri>
 <context-root>/myapp</context-root>
 </web>
 </module>
</application>Good luck

How To Read RTF file in JAVA? Using iText?

How To Read RTF file in JAVA? Using iText?.....
import java.io.*;
import com.lowagie.text.*;
import com.lowagie.text.rtf.*;
public class RTF3 {
public static void main(String[] args) {
// System.out.println("This example generate a RTF file name Sample.rtf");
// Create Document object
Document myDoc = new Document();
try {
// Create writer to listen document object
// and directs RTF Stream to the file Sample.rtf
RtfWriter2.getInstance(myDoc, new FileOutputStream("Sample.rtf"));
// open the document object
myDoc.open();
// Create a paragraph
     Paragraph p = new Paragraph();
     p.add("Helloworld in Rtf file..amazing isn't");
     // Add the paragraph to document object
myDoc.add(p);
catch(Exception e) {
System.out.println(e);
//close the document
myDoc.close();
Exception in thread "main" java.lang.NoSuchMethodError: com.lowagie.text.Rectangle.width()F
     at com.lowagie.text.rtf.document.RtfPageSetting.rectEquals(RtfPageSetting.java:433)
     at com.lowagie.text.rtf.document.RtfPageSetting.guessFormat(RtfPageSetting.java:362)
     at com.lowagie.text.rtf.document.RtfPageSetting.setPageSize(RtfPageSetting.java:341)
     at com.lowagie.text.rtf.RtfWriter2.setPageSize(RtfWriter2.java:248)
     at com.lowagie.text.Document.open(Unknown Source)
     at view.RTF3.main(RTF3.java:23)
CAN you HELP me?

import com.lowagie.text.Document;
import com.lowagie.text.rtf.parser.RtfParser;
import java.io.FileInputStream;
String inputFile = "sample.rtf";
Document document = new Document();
document.open();
RtfParser parser = new RtfParser(null);
parser.convertRtfDocument(new FileInputStream(inputFile), document);

How to use sql query in java ?

i don't know how to use sql query in java code.
who can give me some advice?
thanks

http://java.sun.com/developer/onlineTraining/Database/JDBC20Intro/

How to create web services in java?

Hi,
I am a newbie to java webservices. Can anybody tell me how to create web services in java?
Any tutorial link or step by step doc would be useful.
Appreciate your help in this regard.
Thanks in advance.
naymo01.

Creating web services in Java appears to depend highly upon the server you intend to use.
Here's a tutorial: http://java.sun.com/webservices/docs/1.6/tutorial/doc/index.html

How do I made "Shareware" in Java?

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