Problem in running JAR file

Creating a mobile game using J2ME. The JAR file created by Netbeans IDE when bein run on mobile gives an error: JAR and JAD file did not match.
Manifest file:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.2
Created-By: 1.5.0_06-b05 (Sun Microsystems Inc.)
MIDlet-1: Maze, Maze.png, Maze
MIDlet-Vendor: Unknown
MIDlet-Name: Maze
MIDlet-Version: 1.0
MicroEdition-Configuration: CLDC-1.1
MicroEdition-Profile: MIDP-2.0
JAD file:
MIDlet-1: Maze, Maze.png, Maze
MIDlet-Jar-Size: 100
MIDlet-Jar-URL: Maze.jar
MIDlet-Name: Maze
MIDlet-Vendor: Unknown
MIDlet-Version: 1.0
MicroEdition-Configuration: CLDC-1.1
MicroEdition-Profile: MIDP-2.0
Please consider the query..

Hey I solved the problem in following order
JLabel jbl = new JLabel(new ImageIcon(getClass().getResource("image/theme.GIF")));I have a tips to all who are absorving in this problem
that you should check that whether the extension is in capitalletter or small letter in the jar. Follow the format in your coding
thnx
best regards
tanvir

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Hello All,
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TS: 2010-10-18 17:04:46
<?xml version="1.0" encoding="UTF-8"?>
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</jnlp>-----
When running as a JWS deployment, on JRE 6, the application will be functioning normally for a little while, and then suddenly the following exception is thrown, and the current operation fails because the class in question cannot be accessed:
java.lang.SecurityException: class "acmeapi.communication.CDocImpl"'s signer information does not match signer information of other classes in the same package
     at java.lang.ClassLoader.checkCerts(ClassLoader.java:807)
     at java.lang.ClassLoader.preDefineClass(ClassLoader.java:488)
     at java.lang.ClassLoader.defineClassCond(ClassLoader.java:626)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
     at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
     at com.sun.jnlp.JNLPClassLoader.findClass(JNLPClassLoader.java:288)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
     at acmeapi.common.CDoc.getAnnotationsInfo(CDoc.java:493)
     at acmedesktop.communication.CCommunicationManager.privateGetAnnotations(CCommunicationManager.java:1976)
     at acmedesktop.communication.CCommunicationManager.getAnnotations(CCommunicationManager.java:1828)
     at acmedesktop.annotations.CViewAnnotations.getAnnotations(CViewAnnotations.java:826)
     at acmedesktop.annotations.CViewAnnotations.createView(CViewAnnotations.java:583)
     at acmedesktop.annotations.CViewAnnotations.setData(CViewAnnotations.java:736)
     at acmedesktop.annotations.CViewAnnotations.init(CViewAnnotations.java:205)
     at acmedesktop.hitspanel.CHitsPanel.viewAnnotations(CHitsPanel.java:281)
     at acmedesktop.hitspanel.CHitsTab$3.mousePressed(CHitsTab.java:316)
     at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:263)
     at java.awt.Component.processMouseEvent(Component.java:6260)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
     at java.awt.Component.processEvent(Component.java:6028)
     at java.awt.Container.processEvent(Container.java:2041)
     at java.awt.Component.dispatchEventImpl(Component.java:4630)
     at java.awt.Container.dispatchEventImpl(Container.java:2099)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4235)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
     at java.awt.Container.dispatchEventImpl(Container.java:2085)
     at java.awt.Window.dispatchEventImpl(Window.java:2478)
     at java.awt.Component.dispatchEvent(Component.java:4460)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)-----
The classes of our desktop product are contained within the 'acmedesktop' and 'acmeapi' packages. It requires access to the hard drive of the workstation, and therefore, all jar files included with the application are signed using the following ANT task when compiled:
<signjar keystore="resources/codesigning/keystore.pfx" storetype="pkcs12" storepass="myPassword" alias="myAlias">
     <fileset dir="${jws_dist}/app" includes="*.jar"/>
     <fileset dir="${jws_dist}/app/lib" includes="*.jar" excludes="jhall__V${dt_version}.jar"/>
</signjar>-----
Therefore, all classes, within all jar files, are signed with the same certificate (with the exception of the JavaHelp libraries, which are already signed by Sun - but the class in question attempting to be loaded here is not contained within the JavaHelp jar file anyway). So, the point being, that the exception message stating that the "signer information of the acmeapi.communication.CDocImpl class doesn't match the signer information of other classes in the same package", is simply not correct. All classes within that jar file were signed using the same certificate.
I downloaded the JRE 6 source from dev.java.net and picked through this issue with a debugger. The ClassLoader.checkCerts() method compares the certificate used to sign the current class which is attempting to be loaded, with the certificates which signed all other previously loaded classes within the same package. If they don't match, the exception above is thrown. What is causing the issue is when the checkCerts() method attempts to get the certificates which signed the currently loading class, null is returned. And obviously, comparing null, with an array of the certificates which signed the previously loaded classes, isn't going to match; therefore this exception is thrown.
The checkCerts() method gets the certificates of the currently loading class by calling the java.security.CodeSource.getCertificates() method. Tracing deeper in the debugger, the CodeSource object ultimately gets the certificates from the 'signersRef' member variable of the com.sun.deploy.cache.CachedJarFile class. signerRef is a SoftReference object and can therefore be garbage collected at some point. If it has already been garbage collected, the CachedJarFile class will attempt to retrieve it again from the loaded cache entry by calling com.sun.deploy.cache.MemoryCache.getLoadedResource().
The MemoryCache class maintains the cache entries to the jar files as MemoryCache.CachedResourceReference objects, which subclass WeakReference, and therefore these objects can be garbage collected as well. If the cache entries have also been garbage collected, this leaves the CachedJarFile class with no ability to repopulate the CachedJarFile.signerRef object. Therefore it is completely out of luck getting the certificates which signed the currently loading class, which ultimately causes the above exception.
When the com.sun.deploy.cache.Cache class attempts to retrieve a cache entry using its getCacheEntry() method, it will attempt to get the entry from the MemoryCache class, if null is returned, it will recreate the cache entry and add it back to the MemoryCache. In contrast, when the CachedJarFile class attempts to get a cache entry from the MemoryCache class, if null is returned, it just gives up.
(from com.sun.deploy.cache.CachedJarFile:244)
private CacheEntry getCacheEntry() {
     /* if it was not created by Cache do not search for entry */
     if (resourceURL == null)
          return null;
     CacheEntry ce = (CacheEntry) MemoryCache.getLoadedResource(resourceURL);
     if (ce == null) {
          //This should not happen because CacheEntry should not get collected
          // before CachedJarFile is collected.
          Trace.println("Missing CacheEntry for " + resourceURL + "\n" + ce,
               TraceLevel.CACHE);
     return ce;
When debugging, code execution falls within the code block with the comment stating "This should not happen...", but it is happening in my case.
On an interesting side note, using the jvisualvm.exe tool included with JDK 6, I was able to tell that it seems as though these objects are collected the first time that the JVM allocates more heap space, and then the issue will occur. If I set the initial heap size very large (using -Xms) this issue won't occur at all. But that is kind of a bad solution which I would rather not do, but it is interesting to note for the sake of troubleshooting this issue. The max heap size (-Xmx) is plenty big enough, so the issue is not that we are running out of memory here.
Does anyone have any insight as to what could be causing this? I've searched, and found a couple threads with similar problems but with no clear solutions. It is not just one workstation either, it happens everywhere I deploy the app as a Java Web Start application in a JRE 6 environment. I have been using version 1.6.0_18 on XP, but it seems to happen on any update version of 1.6. Is the fact that the CachedJarFile class doesn't attempt to reload the resource when it can't retrieve it from MemoryCache a bug? I've dug as deep as I can on this and I'm at wits end, does anybody have any ideas?
Thank you
Jake
Edited by: jkc532 on Nov 12, 2010 10:35 AM

jkc532 wrote:
.. Is the fact that the CachedJarFile class doesn't attempt to reload the resource when it can't retrieve it from MemoryCache a bug? From your comprehensive investigation and report, it seems so to me.
..I've dug as deep as I can on this and I'm at wits end, does anybody have any ideas?Just after read the summary I was tired, so I have some understanding of the effort you have already invested in this (the 'wits' you have already spent). I think you should raise a bug report and seek Oracle's response.

Problem using a jar file : java.lang.ClassNotFoundException: ApiConn

Hi everyone.
i am running a form that use a bean_area to call a jar.
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Java Plug-in 1.6.0_33
Using JRE version 1.6.0_33-b05 Java HotSpot(TM) Client VM
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c: clear console window
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m: print memory usage
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r: reload policy configuration
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t: dump thread list
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     at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source)
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     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
     at java.awt.EventQueue.access$000(Unknown Source)
     at java.awt.EventQueue$1.run(Unknown Source)
     at java.awt.EventQueue$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
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     at java.awt.EventQueue$2.run(Unknown Source)
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     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
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     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
Dumping class loader cache...
Live entry: key=http://192.168.10.100:7778/forms/java/,frmall.jar,siberia_jpg.jar,ApiConn.jar,Hasher.jar,ReadCommand.jar,WriteCommand.jar,libAPI.jar, refCount=1, threadGroup=sun.plugin2.applet.Applet2ThreadGroup[name=http://192.168.10.100:7778/forms/java/-threadGroup,maxpri=4]
Done.
in my form i have created a bean_area and used as implementation class :ApiConn
in my formsweb.cfg i used this configuration: archive=frmall.jar,siberia_jpg.jar,ApiConn.jar,Hasher.jar,ReadCommand.jar,WriteCommand.jar,libAPI.jar
in my forms/java i have placed my jar files listed in the frmall.jar
i guess i am missing something but i dont know what it is.
here is my ApiConn.java from wich i generate my jar file:
package libAPI;
* This contains connection. Everything should be here,
* should operate with this class only
import java.io.*;
import java.net.*;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Level;
import java.util.logging.Logger;
* @author janisk
public class ApiConn extends Thread {
private Socket sock = null;
private DataOutputStream out = null;
private DataInputStream in = null;
private String ipAddress;
private int ipPort;
private boolean connected = false;
private String message = "Not connected";
private ReadCommand readCommand = null;
private WriteCommand writeCommand = null;
private Thread listener = null;
LinkedBlockingQueue queue = new LinkedBlockingQueue(40);
* Constructor of the connection class
* @param ipAddress - IP address of the router you want to conenct to
* @param ipPort - port used for connection, ROS default is 8728
public ApiConn(String ipAddress, int ipPort) {
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this.ipPort = ipPort;
this.setName("settings");
* State of connection
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return connected;
public void disconnect() throws IOException{
listener.interrupt();
sock.close();
private void listen() {
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* to get IP address of the connection. Reads data from socket created.
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return sock == null ? null : sock.getInetAddress();
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* Socket remote port number
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return sock == null ? null : sock.getPort();
* return local prot used by socket
* @return
public int getLocalPort() {
return sock == null ? null : sock.getLocalPort();
* Returns status message set up bu class.
* @return
public String getMessage() {
return message;
* sets and exectues command (sends it to RouterOS host connected)
* @param s - command will be sent to RouterOS for example "/ip/address/print\n=follow="
* @return
public String sendCommand(String s) {
return writeCommand.setCommand(s).runCommand();
* exeecutes already set command.
* @return returns status of the command sent
public String runCommand() {
return writeCommand.runCommand();
* Tries to fech data that is repllied to commands sent. It will wait till it can return something.
* @return returns data sent by RouterOS
* @throws java.lang.InterruptedException
public String getData() throws InterruptedException {
String s = (String) queue.take();
return s;
* returns command that is set at this moment. And will be exectued if runCommand is exectued.
* @return
public String getCommand() {
return writeCommand.getCommand();
* set up method that will log you in
* @param name - username of the user on the router
* @param password - password for the user
* @return
public String login(String name, char[] password) {
this.sendCommand("/login");
String s = "a";
try {
s = this.getData();
} catch (InterruptedException ex) {
Logger.getLogger(ApiConn.class.getName()).log(Level.SEVERE, null, ex);
return "failed read #1";
if (!s.contains("!trap") && s.length() > 4) {
String[] tmp = s.trim().split("\n");
if (tmp.length > 1) {
tmp = tmp[1].split("=ret=");
s = "";
String transition = tmp[tmp.length - 1];
String chal = "";
chal = Hasher.hexStrToStr("00") + new String(password) + Hasher.hexStrToStr(transition);
chal = Hasher.hashMD5(chal);
String m = "/login\n=name=" + name + "\n=response=00" + chal;
s = this.sendCommand(m);
try {
s = this.getData();
} catch (InterruptedException ex) {
Logger.getLogger(ApiConn.class.getName()).log(Level.SEVERE, null, ex);
return "failed read #2";
if (s.contains("!done")) {
if (!s.contains("!trap")) {
return "Login successful";
return "Login failed";
@Override
public void run() {
try {
InetAddress ia = InetAddress.getByName(ipAddress);
if (ia.isReachable(1000)) {
sock = new Socket(ipAddress, ipPort);
in = new DataInputStream(sock.getInputStream());
out = new DataOutputStream(sock.getOutputStream());
connected = true;
readCommand = new ReadCommand(in, queue);
writeCommand = new WriteCommand(out);
this.listen();
message = "Connected";
} else {
message = "Not reachable";
} catch (UnknownHostException ex) {
connected = false;
message = ex.getMessage();
ex.printStackTrace();
} catch (IOException ex) {
connected = false;
message = ex.getMessage();
ex.printStackTrace();
}

I need your help again, i think this is a minor thing.
i have compiled the class file that i needed and i signed it too. but now it is giving me a new error and need your tip.
here is the java console loyout and my java file ((i think here is the problem in java file, something must be missing)).
thanks in advance for any help.
Java Plug-in 10.17.2.02
Using JRE version 1.7.0_17-b02 Java HotSpot(TM) Client VM
User home directory = C:\Users\Administrator
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
network: Connecting http://192.168.10.100:7778/forms/lservlet;jsessionid=c0a80a6430d6e191eded93774f2f8d1bed73056e66ef.e3mObhiMbxeKe34PahiKbx4Nbh90n6jAmljGr5XDqQLvpAe with proxy=DIRECT
security: Validate the certificate chain using CertPath API
security: The certificate hasnt been expired, no need to check timestamping info
security: Cannot find jurisdiction list file
security: The CRL support is disabled
security: The OCSP support is disabled
security: This OCSP End Entity validation is disabled
security: Checking if certificate is in Deployment denied certificate store
security: Checking if certificate is in Deployment permanent certificate store
basic: updateValidationResultsForApplet update
cache: Mark prevalidated: http://192.168.10.100:7778/forms/java/ApiConn.jar true tm=1363335797289 cert=1371107987000
basic: Plugin2ClassLoader.getPermissions CeilingPolicy allPerms
java.lang.InstantiationException: oracle.forms.siberia.ApiConn
     at java.lang.Class.newInstance0(Unknown Source)
     at java.lang.Class.newInstance(Unknown Source)
     at oracle.forms.handler.UICommon.instantiate(Unknown Source)
     at oracle.forms.handler.UICommon.onCreate(Unknown Source)
     at oracle.forms.handler.JavaContainer.onCreate(Unknown Source)
     at oracle.forms.engine.Runform.onCreateHandler(Unknown Source)
     at oracle.forms.engine.Runform.processMessage(Unknown Source)
     at oracle.forms.engine.Runform.processSet(Unknown Source)
     at oracle.forms.engine.Runform.onMessageReal(Unknown Source)
     at oracle.forms.engine.Runform.onMessage(Unknown Source)
     at oracle.forms.engine.Runform.processEventEnd(Unknown Source)
     at oracle.ewt.lwAWT.LWComponent.redispatchEvent(Unknown Source)
     at oracle.ewt.lwAWT.LWComponent.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
     at java.awt.EventQueue.access$200(Unknown Source)
     at java.awt.EventQueue$3.run(Unknown Source)
     at java.awt.EventQueue$3.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
     at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
     at java.awt.EventQueue$4.run(Unknown Source)
     at java.awt.EventQueue$4.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
network: Connecting http://192.168.10.100:7778/forms/lservlet;jsessionid=c0a80a6430d6e191eded93774f2f8d1bed73056e66ef.e3mObhiMbxeKe34PahiKbx4Nbh90n6jAmljGr5XDqQLvpAe with proxy=DIRECT
Exception in thread "Forms-DialogThread2" java.lang.NullPointerException
     at oracle.forms.handler.JavaContainer.onDestroy(Unknown Source)
     at oracle.forms.engine.Runform.destroyHandlers(Unknown Source)
     at oracle.forms.handler.DialogThread.doAlert(Unknown Source)
     at oracle.forms.handler.DialogThread.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Dumping class loader cache...
Live entry: key=http://192.168.10.100:7778/forms/java/,frmall.jar,siberia_jpg.jar,ApiConn.jar,ConcealTextField.jar, refCount=1, threadGroup=sun.plugin2.applet.Applet2ThreadGroup[name=http://192.168.10.100:7778/forms/java/-threadGroup,maxpri=4]
Done.
here is my java file
* To change this template, choose Tools | Templates
* and open the template in the editor.
package oracle.forms.siberia;
* This contains connection. Everything should be here,
* should operate with this class only
import java.io.*;
import java.net.*;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.logging.Level;
import java.util.logging.Logger;
import oracle.forms.*;
* @author janisk
public class ApiConn extends Thread {
private Socket sock = null;
private DataOutputStream out = null;
private DataInputStream in = null;
private String ipAddress;
private int ipPort;
private boolean connected = false;
private String message = "Not connected";
private ReadCommand readCommand = null;
private WriteCommand writeCommand = null;
private Thread listener = null;
LinkedBlockingQueue queue = new LinkedBlockingQueue(40);
* Constructor of the connection class
* @param ipAddress - IP address of the router you want to conenct to
* @param ipPort - port used for connection, ROS default is 8728
public ApiConn(String ipAddress, int ipPort) {
this.ipAddress = ipAddress;
this.ipPort = ipPort;
this.setName("settings");
* State of connection
* @return - if connection is established to router it returns true.
public boolean isConnected() {
return connected;
public void disconnect() throws IOException{
listener.interrupt();
sock.close();
private void listen() {
if (this.isConnected()) {
if (readCommand == null) {
readCommand = new ReadCommand(in, queue);
listener = new Thread(readCommand);
listener.setDaemon(true);
listener.setName("listener");
listener.start();
* to get IP address of the connection. Reads data from socket created.
* @return InetAddress
public InetAddress getIpAddress() {
return sock == null ? null : sock.getInetAddress();
* returns ip address that socket is asociated with.
* @return InetAddress
public InetAddress getLocalIpAddress() {
return sock == null ? null : sock.getLocalAddress();
* Socket remote port number
* @return
public int getPort() {
return sock == null ? null : sock.getPort();
* return local prot used by socket
* @return
public int getLocalPort() {
return sock == null ? null : sock.getLocalPort();
* Returns status message set up bu class.
* @return
public String getMessage() {
return message;
* sets and exectues command (sends it to RouterOS host connected)
* @param s - command will be sent to RouterOS for example "/ip/address/print\n=follow="
* @return
public String sendCommand(String s) {
return writeCommand.setCommand(s).runCommand();
* exeecutes already set command.
* @return returns status of the command sent
public String runCommand() {
return writeCommand.runCommand();
* Tries to fech data that is repllied to commands sent. It will wait till it can return something.
* @return returns data sent by RouterOS
* @throws java.lang.InterruptedException
public String getData() throws InterruptedException {
String s = (String) queue.take();
return s;
* returns command that is set at this moment. And will be exectued if runCommand is exectued.
* @return
public String getCommand() {
return writeCommand.getCommand();
* set up method that will log you in
* @param name - username of the user on the router
* @param password - password for the user
* @return
public String login(String name, char[] password) {
this.sendCommand("/login");
String s = "a";
try {
s = this.getData();
} catch (InterruptedException ex) {
Logger.getLogger(ApiConn.class.getName()).log(Level.SEVERE, null, ex);
return "failed read #1";
if (!s.contains("!trap") && s.length() > 4) {
String[] tmp = s.trim().split("\n");
if (tmp.length > 1) {
tmp = tmp[1].split("=ret=");
s = "";
String transition = tmp[tmp.length - 1];
String chal = "";
chal = Hasher.hexStrToStr("00") + new String(password) + Hasher.hexStrToStr(transition);
chal = Hasher.hashMD5(chal);
String m = "/login\n=name=" + name + "\n=response=00" + chal;
s = this.sendCommand(m);
try {
s = this.getData();
} catch (InterruptedException ex) {
Logger.getLogger(ApiConn.class.getName()).log(Level.SEVERE, null, ex);
return "failed read #2";
if (s.contains("!done")) {
if (!s.contains("!trap")) {
return "Login successful";
return "Login failed";
@Override
public void run() {
try {
InetAddress ia = InetAddress.getByName(ipAddress);
if (ia.isReachable(1000)) {
sock = new Socket(ipAddress, ipPort);
in = new DataInputStream(sock.getInputStream());
out = new DataOutputStream(sock.getOutputStream());
connected = true;
readCommand = new ReadCommand(in, queue);
writeCommand = new WriteCommand(out);
this.listen();
message = "Connected";
} else {
message = "Not reachable";
} catch (UnknownHostException ex) {
connected = false;
message = ex.getMessage();
ex.printStackTrace();
} catch (IOException ex) {
connected = false;
message = ex.getMessage();
ex.printStackTrace();
}

Running Jar Files created in Sun Java Studio

Hi everyone,
I am still trying to explore the functionalities (especially as regards deployment issues) of this robust IDE. However I do have a problem. I have developed a very basic program that connects to a database (MSSQL) using Java Studio 8. However after building the jar file, if I try to execute the jar file it gives me this message
java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver.SQLServerDriver.....
But all goes well within the IDE and it runs well if I use my notepad or vi editor,compile it from the command line and execute the generated class file. The classpath have been set for all the necessary jdbc jar files.
Any Help Will Be Appreciated

1. Sun Java Studio Enterprise 8 is based on NetBeans 4.1 which does not provide direct support for packing an application. One alternative you may want to consider is to use NetBeans 5.0 (http://www.netbeans.info/downloads/download.php?type=5.0) or JSE 8.1 which is based on NB5.0 and which is now in beta (http://developers.sun.com/prodtech/javatools/jsenterprise/downloads/index.jsp).
You may want to refer to http://www.netbeans.org/kb/articles/javase-deploy.html for packing and deploying a standalone application is NB5.0 or JSE8.1.
2. Using JSE8, you may want to try copying all the library jars (including database drivers) used by your application to your projects dist directory manually and then package them all into one jar.
3. You should not have to know the exact location of the jdbc jar on the client machine. How are you instantiating the driver in your code? Are you using 'Class.forName()'? If so, java should be able to pick up the driver from the classpath. (Pl. ref to http://forum.sun.com/jive/thread.jspa?forumID=122&threadID=62696, which may be of help).

Running JAR files (Could not find the main class error)

Hi all,
I'm having a bit of a problem with my app. I created an application with the current Netbeans edition, containing multiple .class files, and a few .jar libraries that are needed too.
Now I'm having problems with running the .jar that the Netbeans creates, so I figured I'd make a one on my own.
Okay, this is what I have going on:
C:\MyApp\ <--- root for the application
C:\MyApp\src\ <--- this is where the .class files are
C:\MyApp\lib\ <--- here are the .jar libraries which are needed
C:\MyApp\jar.exe
C:\MyApp\Manifest.txt
Now I have a couple questions.
1. Is it ok that the .class files all have a "package MyPackage; " thing in the beginning?
2. How should I proceed on making the Manifest.txt file correctly? I have tried various different outputs and read a few topics here from how it should be done, but I just can't nail it. Currently my Manifest looks like:
Main-Class: MyPackage/Myapp
Class-Path: lib/xxx.jar lib/xxx2.jar lib/xxx3.jar
Any help would be appreciated! Thanks.

Oh, almost forgot:
3. The right way to create a jar? I used this:
C:\MyApp\jar cmf Manifest.txt MyJar.jar src\*.class
And system is Windows XP.

Could not read Log4j configuration file when I run jar file

Hi,
I'm using Log4J in my application..
I configure the log4j, as follows;
PropertyConfigurator.configure("properties/logging.properties");and then go on to use it.
The .properties is in the root when I jar my source. I use Ant to Jar the file. It all works good when I run the jar file from ant.
The problem is when I run the jar file by double clicking on it, I get an error
" Could not read configuration file [properties/logging.properties]."
I tried the following options;
PropertyConfigurator.configure("/logging.properties");
PropertyConfigurator.configure("./logging.properties");
PropertyConfigurator.configure("../logging.properties");But in all cases, I get corresponding errors on running the jar file through Ant:
log4j:ERROR Could not read configuration file [logging.properties].
log4j:ERROR Could not read configuration file [./logging.properties].
log4j:ERROR Could not read configuration file [../logging.properties].
I want to be able to run the Jar by double clicking on it or through Ant.. Would any one know how to fix this issue so that I can use both methods..

Keep your properties file inside the root folder of your application.It is working fine

Running .jar files in linux on double click

Hi,
i needed a solution to run the jar files on double click in linux system.Necessity is mainly because when i run the jar file by java -jar myapp.jar in terminal it works fine .Iam running my app continuosly in system tray(a server kind).But if i close the terminal my app exits.
How to resolve this ?

I am taking a SWAG.....it sounds like your problem is how to run a java app without a terminal window. So as I recall, there is some way in Linux to enter a command and have it execute in a new process. I don't recall the syntax but maybe putting a '&' character in the command line? Anyway, you should be able to use the method and use "javaw" instead of "java" to launch your app. You should be able to do this in a batch file too. Something like, javaw -jar yourjar.jar &

Error Running jar file on Linux Server

Hi,
I recently wrote a small program to be run together when apache is being start up on the server. When the bin/startup.sh is executed, my program will be run together
exec java -classpath ./ZipLogs.jar com.btsoft.magic.zip.ZipFile
I included this command in the startup.sh but the following error came up when I run it:
Exception in thread "main" java.lang.NoClassDefFoundError: com/btsoft/magic/zip/ZipFile
I placed the jar file in the same directory as the startup.sh.
But when I run it directly on the console:
java -classpath ./ZipLogs.jar com.btsoft.magic.zip.ZipFile
its fine..
Can anyone help me with this problem?
Thanks

williammandrake wrote:
I placed the jar file in the same directory as the startup.sh.That would suggest to me that your directory is wrong. I suggest you start by printing out cwd.
Could also be a permissions problem as well.

Can't run .jar file with JavaSE

Hello.
I'm trying to run a .jar file with JavaSE Binary, just like I did with Windows. I Ctrl+Rclick and pick "Open with..." and there is no such option. I've been searching the whole day for a solution, I kept getting "Open Java Preferences... put on top of the list" and things like that. There is no "Java Preferences" in the Utilities folder, and nothing related to my problem in "Java Control Panel" in System Preferences. Yes, I have Java 7. I just need to run this file with Java. How?
Thanks in advance.

Max. allowed size of .jar file is 1MB.

Problem in running JAR file

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