Applet in IE
I am trying to create a simple applet and am having trouble getting it to work with the MS VM. I tried creating a simple applet that doesn't do anything but that doesn't work either. I am getting the following error in the console:
Error loading class: test2
java.lang.NoClassDefFoundError
java.lang.ClassNotFoundException: test2
at com/ms/vm/loader/URLClassLoader.loadClass (URLClassLoader.java)
at com/ms/vm/loader/URLClassLoader.loadClass (URLClassLoader.java)
at com/ms/applet/AppletPanel.securedClassLoad (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.processSentEvent (AppletPanel.java)
at com/ms/applet/AppletPanel.run (AppletPanel.java)
at java/lang/Thread.run (Thread.java)
Here is the class...
import java.applet.*;
public class test2 extends Applet {
public void init()
System.out.println("loaded");
Any ideas?
Here is the HTML file:
<HTML>
<body>
<APPLET CODE="test2.class" WIDTH=320 HEIGHT=80>
</APPLET>
</body>
</HTML>
here is the dir structure.
/java/test.html
/java/test2.class
Oh yeah, I've gotten this to work with the Sun Plugin, but I want to ensure compatibility with all browsers without requiring a software install.
TIA
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Hi all,
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Here is my code : There are in all 3 codes, one is purse, second is loyalty code and third is the shareable interface code. Can some one look at the code and tell me what's wrong in this programs.
package com.gemplus.examples.loyalty;
import javacard.framework.*;
import visa.openplatform.*;
public class Loyalty extends javacard.framework.Applet implements TestInterface
static byte points ;
protected Loyalty(byte[] buffer, short offset, byte length)
// data offset is used for application specific parameter.
// initialization with default offset (AID offset).
short dataOffset = offset;
if(length > 9) {
// Install parameter detail. Compliant with OP 2.0.1.
// | size | content
// |------|---------------------------
// | 1 | [AID_Length]
// | 5-16 | [AID_Bytes]
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// | 0-m | [Application_Proprietary_Bytes]
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* @param bArray the array constaining installation parameters
* @param bOffset the starting offset in bArray
* @param bLength the length in bytes of the data parameter in bArray
public static void install(byte[] bArray, short bOffset, byte bLength) throws ISOException
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* @return boolean status of selection.
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return;
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creditPoints((byte)0x00);
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apduBuffer[6] = (byte)points ;
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package com.gemplus.examples.oppurse;
* Imported packages
import javacard.framework.*;
import visa.openplatform.*;
import com.gemplus.examples.loyalty.*;
public class OPPurse extends javacard.framework.Applet
// the APDU constants for all the commands.
private final static byte INS_GET_BALANCE = (byte)0x30 ;
private final static byte INS_DEBIT = (byte)0x31 ;
private final static byte INS_CREDIT = (byte)0x32 ;
private final static byte INS_VERIFY_PIN = (byte)0x33 ;
private final static byte INS_SET_NAME = (byte)0x34 ;
private final static byte INS_GET_NAME = (byte)0x35 ;
// the OP/VOP specific instruction set for mutual authentication
private final static byte CLA_INIT_UPDATE = (byte)0x80 ;
private final static byte INS_INIT_UPDATE = (byte)0x50 ;
private final static byte CLA_EXTERNAL_AUTHENTICATE = (byte)0x84 ;
private final static byte INS_EXTERNAL_AUTHENTICATE = (byte)0x82 ;
// the PIN validity flag
private boolean validPIN = false;
// SW bytes for PIN Failed condition
// the last nibble is replaced with the number of remaining tries
private final static short SW_PIN_FAILED = (short)0x63C0;
private final static short SW_FAILED_TO_OBTAIN_SIO = (short)0x63D0;
private final static short SW_LOYALTY_APP_NOT_EXIST = (short)0x63E0;
// the illegal amount value for the exceptions.
private final static short ILLEGAL_AMOUNT = 1;
// the maximum balance in this purse.
private static final short maximumBalance = 10000;
// the current balance in this purse.
private static short balance;
/* byte[] loyaltyAID = new byte[]{ (byte)0xA0,(byte)0x00,(byte)0x00,(byte)0x00,
(byte)0x19,(byte)0xFF,(byte)0x00,(byte)0x00,
(byte)0x00,(byte)0x00,(byte)0x00,(byte)0x00,
(byte)0x00,(byte)0x00,(byte)0x02,(byte)0x02};*/
/* Security part of declarations */
// the Security Object necessary to credit the purse
private ProviderSecurityDomain securityObject = null;
// the security channel number
byte secureChannel = (byte)0xFF;
// the authentication status
private boolean authenticationDone = false;
// the secure channel status
private boolean channelOpened = false;
private byte[] nameBuffer = new byte[6];
* Only this class's install method should create the applet object.
protected OPPurse(byte[] buffer, short offset, byte length)
// data offset is used for application specific parameter.
// initialization with default offset (AID offset).
short dataOffset = offset;
if(length > 9) {
// Install parameter detail. Compliant with OP 2.0.1.
// | size | content
// |------|---------------------------
// | 1 | [AID_Length]
// | 5-16 | [AID_Bytes]
// | 1 | [Privilege_Length]
// | 1-n | [Privilege_Bytes] (normally 1Byte)
// | 1 | [Application_Proprietary_Length]
// | 0-m | [Application_Proprietary_Bytes]
// shift to privilege offset
dataOffset += (short)( 1 + buffer[offset]);
// finally shift to Application specific offset
dataOffset += (short)( 1 + buffer[dataOffset]);
// checks wrong data length
if(buffer[dataOffset] != 2)
// return received proprietary data length in the reason
ISOException.throwIt((short)(ISO7816.SW_WRONG_LENGTH + offset + length - dataOffset));
// go to proprietary data
dataOffset++;
} else {
// Install parameter compliant with OP 2.0.
if(length != 2)
ISOException.throwIt((short)(ISO7816.SW_WRONG_LENGTH + length));
// retreive the balance value from the APDU buffer
short value = (short)(((buffer[(short)(dataOffset + 1)]) & 0xFF)
| ((buffer[dataOffset] & 0xFF) << 8));
// checks initial balance value
if(value > maximumBalance)
ISOException.throwIt(ISO7816.SW_DATA_INVALID);
// initializes the balance with the APDU buffer contents
balance = value;
// register this instance as an installed Applet
register();
// ask the system for the Security Object associated to the Applet
securityObject = OPSystem.getSecurityDomain();
// applet is personalized and its state can change
OPSystem.setCardContentState(OPSystem.APPLET_PERSONALIZED);
// build the new ATR historical bytes
byte[] newATRHistory = new byte[]
// put "OPPurse" in historical bytes.
(byte)0x4F, (byte)0x50, (byte)0x50, (byte)0x75, (byte)0x72, (byte)0x73, (byte)0x65
// !!! ACTIVATED IF INSTALL PRIVILEGE IS "Default Selected" (0x04). !!!
// change the default ATR to a personalized's one
OPSystem.setATRHistBytes(newATRHistory, (short)0, (byte)newATRHistory.length);
* Method installing the applet.
* @param installparam the array constaining installation parameters
* @param offset the starting offset in installparam
* @param length the length in bytes of the data parameter in installparam
public static void install(byte[] installparam, short offset, byte length )
throws ISOException
// applet instance creation with the initial balance
new OPPurse(installparam, offset, length );
* Select method returning true if applet selection is supported.
* @return boolean status of selection.
public boolean select()
validPIN = false;
// reset security if used.
// In case of reset deselect is not called
reset_security();
// return status of selection
return true;
* Deselect method.
public void deselect()
// reset security if used.
reset_security();
return;
* Method processing an incoming APDU.
* @see APDU
* @param apdu the incoming APDU
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public void process(APDU apdu) throws ISOException
// get the APDU buffer
// the APDU data is available in 'apduBuffer'
byte[] apduBuffer = apdu.getBuffer();
// the "try" is mandatory because the debit method
// can throw a javacard.framework.UserException
try
switch(apduBuffer[ISO7816.OFFSET_INS])
case INS_VERIFY_PIN :
verifyPIN(apdu);
break ;
case INS_GET_BALANCE :
getBalance(apdu) ;
break ;
case INS_DEBIT :
debit(apdu) ;
break ;
case INS_SET_NAME :
setName(apdu);
break;
case INS_GET_NAME :
getName(apdu);
break ;
case INS_CREDIT :
credit(apdu) ;
break ;
case INS_INIT_UPDATE :
if(apduBuffer[ISO7816.OFFSET_CLA] == CLA_INIT_UPDATE)
// call initialize/update security method
init_update(apdu) ;
else
// wrong CLA received
ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
break ;
case INS_EXTERNAL_AUTHENTICATE :
if(apduBuffer[ISO7816.OFFSET_CLA] == CLA_EXTERNAL_AUTHENTICATE)
// call external/authenticate security method
external_authenticate(apdu) ;
else
// wrong CLA received
ISOException.throwIt(ISO7816.SW_CLA_NOT_SUPPORTED);
break ;
case ISO7816.INS_SELECT :
break ;
default :
// The INS code is not supported by the dispatcher
ISOException.throwIt(ISO7816.SW_INS_NOT_SUPPORTED) ;
break ;
} // end of the switch
} // end of the try
catch(UserException e)
// translates the UserException in an ISOException.
if(e.getReason() == ILLEGAL_AMOUNT)
throw new ISOException ( ISO7816.SW_DATA_INVALID ) ;
//- P R I V A T E M E T H O D S -
* Handles Verify Pin APDU.
* @param apdu APDU object
private void verifyPIN(APDU apdu)
// get APDU data
apdu.setIncomingAndReceive();
// get APDU buffer
byte[] apduBuffer = apdu.getBuffer();
// check that the PIN is not blocked
if(OPSystem.getTriesRemaining() == 0)
OPSystem.setCardContentState(OPSystem.APPLET_BLOCKED);
// Pin format for OP specification
// |type(2),length|nible(1),nible(2)|nible(3),nible(4)|...|nible(n-1),nible(n)|
// get Pin length
byte length = (byte)(apduBuffer[ISO7816.OFFSET_LC] & 0x0F);
// pad the PIN ASCII value
for(byte i=length; i<0x0E; i++)
// only low nibble of padding is used
apduBuffer[ISO7816.OFFSET_CDATA + i] = 0x3F;
// fill header TAG
apduBuffer[0] = (byte)((0x02 << 4) | length);
// parse ASCII Pin code
for(byte i=0; i<0x0E; i++)
// fill bytes with ASCII Pin nibbles
if((i & 0x01) == 0)
// high nibble
apduBuffer[(i >> 1)+1] = (byte)((apduBuffer[ISO7816.OFFSET_CDATA + i] & 0x0F) << 4);
else
// low nibble
apduBuffer[(i >> 1)+1] |= (byte)(apduBuffer[ISO7816.OFFSET_CDATA + i] & 0x0F);
// verify the received PIN
// !!! WARNING PIN HAS TO BE INITIALIZED BEFORE USE !!!
if(OPSystem.verifyPin(apdu, (byte)0))
// set PIN validity flag
validPIN = true;
// if applet state is BLOCKED then restore previous state (PERSONALIZED)
if(OPSystem.getCardContentState() == OPSystem.APPLET_BLOCKED)
OPSystem.setCardContentState(OPSystem.APPLET_PERSONALIZED);
return;
// the last nibble of returned code is the number of remaining tries
ISOException.throwIt((short)(SW_PIN_FAILED + OPSystem.getTriesRemaining()));
* Performs the "getBalance" operation on this counter.
* @param apdu The APDU to process.
private void getBalance( APDU apdu )
// check valid Applet state
if(OPSystem.getCardContentState() == OPSystem.APPLET_BLOCKED)
ISOException.throwIt(ISO7816.SW_COMMAND_NOT_ALLOWED);
// get the APDU buffer
byte[] apduBuffer = apdu.getBuffer();
// writes the balance into the APDU buffer after the APDU command part
apduBuffer[5] = (byte)(balance >> 8) ;
apduBuffer[6] = (byte)balance ;
// sends the APDU response
// switches to output mode
apdu.setOutgoing() ;
// 2 bytes to return
apdu.setOutgoingLength((short)2) ;
// offset and length of bytes to return in the APDU buffer
apdu.sendBytes((short)5, (short)2) ;
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}//end of storeName
* Performs the "debit" operation on this counter.
* @param apdu The APDU to process.
* @exception ISOException If the APDU is invalid.
* @exception UserException If the amount to debit is invalid.
private void debit(APDU apdu) throws ISOException, UserException
// check valid Applet state
if(OPSystem.getCardContentState() == OPSystem.APPLET_BLOCKED)
ISOException.throwIt(ISO7816.SW_COMMAND_NOT_ALLOWED);
// the operation is allowed only if master pin is validated
if(!validPIN)
ISOException.throwIt(ISO7816.SW_SECURITY_STATUS_NOT_SATISFIED);
// get the APDU buffer
byte[] apduBuffer = apdu.getBuffer();
// Gets the length of bytes to recieved from the terminal and receives them
// If does not receive 4 bytes throws an ISO.SW_WRONG_LENGTH exception
if(apduBuffer[4] != 2 || apdu.setIncomingAndReceive() != 2)
ISOException.throwIt(ISO7816.SW_WRONG_LENGTH) ;
// Reads the debit amount from the APDU buffer
// Starts at offset 5 in the APDU buffer since the 5 first bytes
// are used by the APDU command part
short amount = (short)(((apduBuffer[6]) & (short)0x000000FF)
| ((apduBuffer[5] << 8 ) & (short)0x0000FF00));
// tests if the debit is valid
if((balance >= amount) && (amount > 0))
// does the debit operation
balance -= amount ;
// writes the new balance into the APDU buffer
// (writes after the debit amount in the APDU buffer)
apduBuffer[7] = (byte)(balance >> 8) ;
apduBuffer[8] = (byte)balance ;
// sends the APDU response
apdu.setOutgoing() ; // Switches to output mode
apdu.setOutgoingLength((short)2) ; // 2 bytes to return
// offset and length of bytes to return in the APDU buffer
apdu.sendBytes((short)7, (short)2) ;
/*short points = 10;
AID loyaltyID = JCSystem.lookupAID(loyaltyAID, (short)0, (byte)loyaltyAID.length);
if(loyaltyID == null)
ISOException.throwIt((short)(SW_LOYALTY_APP_NOT_EXIST));
TestInterface sio = (TestInterface)(JCSystem.getAppletShareableInterfaceObject(loyaltyID, (byte)0x00));
if(sio == null)
ISOException.throwIt((short)(SW_FAILED_TO_OBTAIN_SIO));
sio.creditPoints(points);*/
else
// throw a UserException with illegal amount as reason
throw new UserException(ILLEGAL_AMOUNT) ;
/* byte points = (byte)0x0A;
//short points = 10;
AID loyaltyID = JCSystem.lookupAID(loyaltyAID, (short)0, (byte)loyaltyAID.length);
if(loyaltyID == null)
ISOException.throwIt((short)(SW_LOYALTY_APP_NOT_EXIST));
TestInterface sio = (TestInterface)JCSystem.getAppletShareableInterfaceObject(loyaltyID, (byte)0x00);
if(sio == null)
ISOException.throwIt((short)(SW_FAILED_TO_OBTAIN_SIO));
sio.creditPoints(points);*/
* Performs the "credit" operation on this counter. The operation is allowed only
* if master pin is validated
* @param apdu The APDU to process.
* @exception ISOException If the APDU is invalid or if the amount to credit
* is invalid.
private void credit(APDU apdu) throws ISOException
// check valid Applet state
if(OPSystem.getCardContentState() == OPSystem.APPLET_BLOCKED)
ISOException.throwIt(ISO7816.SW_COMMAND_NOT_ALLOWED);
// the operation is allowed only if master pin is validated and authentication is done
if (!validPIN || !authenticationDone)
ISOException.throwIt(ISO7816.SW_SECURITY_STATUS_NOT_SATISFIED);
// get the APDU buffer
byte[] apduBuffer = apdu.getBuffer();
// gets the length of bytes to recieved from the terminal and receives them
// if does not receive 2 bytes throws an ISO.SW_WRONG_LENGTH exception
if(apduBuffer[4] != 2 || apdu.setIncomingAndReceive() != 2)
throw new ISOException(ISO7816.SW_WRONG_LENGTH) ;
// reads the credit amount from the APDU buffer
// starts at offset 5 in the APDU buffer since the 5 first bytes
// are used by the APDU command part
short amount = (short)(((apduBuffer[6]) & (short)0x000000FF)
| ((apduBuffer[5] << 8) & (short)0x0000FF00));
// tests if the credit is valid
if(((short)(balance + amount) > maximumBalance) || (amount <= (short)0))
throw new ISOException(ISO7816.SW_DATA_INVALID) ;
else
// does the credit operation
balance += amount ;
* Performs the "init_update" security operation.
* @param apdu The APDU to process.
private void init_update( APDU apdu )
// receives data
apdu.setIncomingAndReceive();
// checks for existing active secure channel
if(channelOpened)
// close the openned security channel
try
securityObject.closeSecureChannel(secureChannel);
catch(CardRuntimeException cre2)
// channel number is invalid. this case is ignored
// set the channel flag to close
channelOpened = false;
try
// open a new security channel
secureChannel = securityObject.openSecureChannel(apdu);
// set the channel flag to open
channelOpened = true;
// get expected length
short expected = apdu.setOutgoing();
// send authentication result
// expected length forced to 0x1C
apdu.setOutgoingLength((byte)0x1C);
apdu.sendBytes(ISO7816.OFFSET_CDATA, (byte)0x1c);
catch(CardRuntimeException cre)
// no available channel or APDU is invalid
ISOException.throwIt(ISO7816.SW_CONDITIONS_NOT_SATISFIED);
* Performs the "external_authenticate" security operation.
* @param apdu The APDU to process.
private void external_authenticate( APDU apdu )
// receives data
apdu.setIncomingAndReceive();
// checks for existing active secure channel
if(channelOpened)
try
// try to authenticate the client
securityObject.verifyExternalAuthenticate(secureChannel, apdu);
// authentication succeed
authenticationDone = true;
catch(CardRuntimeException cre)
// authentication fails
// set authentication flag to fails
authenticationDone = false;
// close the openned security channel
try {
securityObject.closeSecureChannel(secureChannel);
} catch(CardRuntimeException cre2) {
// channel number is invalid. this case is ignored
// set the channel flag to close
channelOpened = false;
// send authentication result
ISOException.throwIt(ISO7816.SW_SECURITY_STATUS_NOT_SATISFIED);
// send authentication result
ISOException.throwIt(ISO7816.SW_NO_ERROR);
else
ISOException.throwIt(ISO7816.SW_SECURITY_STATUS_NOT_SATISFIED);
* The "reset_security" method close an opened secure channel if exist.
* @return void.
public void reset_security()
// close the secure channel if openned.
if(secureChannel != (byte)0xFF)
try
// close the openned security channel
securityObject.closeSecureChannel(secureChannel);
catch(CardRuntimeException cre2)
// channel number is invalid. this case is ignored
// reset security parameters
secureChannel = (byte)0xFF;
channelOpened = false;
authenticationDone = false;
return;
and the 3rd code is:
package com.gemplus.examples.loyalty;
import javacard.framework.Shareable;
public interface TestInterface extends Shareable
// public void creditPoints(byte points) ;
public void creditPoints(byte points) ;
Thanks in advance......Thanks. I know they are not the same thing. A package cannot be deleted if it contains one or more applets.
I tried to delete by typing in the applet AID first, but it just doesn't work. And of course it doesn't work for package AID.
Both the package and applet AID are generated in JBuilder, which looks like this, package AID(6D 79 70 61 63 6B 61 67 31),
applet AID(6D 79 70 61 63 30 30 30 31),
instance AID(6D 79 70 61 63 30 30 30 31)
I've tried those three AIDs, it's not working.
Thanks. -
Applet load times got you down?
Then vote for this RFE:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6346341
The whole discussion started here:
http://forum.java.sun.com/thread.jspa?threadID=678853&tstart=0
-DennisI have the same problem, and add this replay to motivate a clever person to solve this problem.
My situation is:
20 Applets (or so) on one page - they span exactly on Thread - if clicked. And if I reload the page they never work again - I have to restart the browser.
If I browse to the page with the applets I have complete browser crash in 3 of 4 cases. But the first time I visted the page after reboot of Linux (everything less don't help) all the applets work.
If I put only one Applet on a page and reload this page, then in a few lucky cases the Applet works a second time.
On windows everything is fine, so I don't think my
Applets are the problem.
On linux I tried several version of upto Mozilla 0.9.8
everytime the same (but 0.9.8 don't work at all with the plugin). -
JRE freeze when loading applet twice, through VSAT network
Here is a good one for you guys I think ...
===========
What I got:
===========
I have a java web application, runing with Tomcat 5.5.
I use a Apache HTTP Server 2.0.52 for my statiques ressources (html, etc ...), and the modjk connector 1.2.13 to forward all the dynamic requests from the client to the application server.
One of my html pages contains a signed java applet.
Basically, this applet control a scanner and send the scanned image to the web application server.
This applet:
- use some swing components
- use the netscape.javascript.JSObject to call javascript functions
- use the morena API (which include a native library) in order to control a TWAIN scanner
- format the scanned image into a JPEG image
- send the formatted image to the web server, using an HttpURLConnection
(I use a servlet on server side to get the uploaded image)
- wait for the server response, that tells my applet if the upload has been successfull or not
Some additional infos:
- I use morena 6.2.0.0
- I use JRE 1.5.0.0.1 to run the applet
- JRE on client side is configured as follow:
- no applet caching
- network parameters: "use the browser parameters"
==============
My problem is:
==============
- Through a LAN network, the applet works perfectly ...
- Through an internet network (I use a VSAT / IDIRECT network), I can load and run my applet the first time
but when I try to run my applet for the second time (without closing the browser), it just doesn't start, and the JRE crash
(i.e. the java console freeze ..., just like if it was waiting for something ...)
nothing happen after that, and I have to kill my JRE / Browser
the funny stuff about it is that the applet works fine (even through VSAT network) when I don't upload the scanned image on the server
load and run ok as many time as I want ...
=> seems that something's going wrong during the uploading process
==========================
What I have already tried:
==========================
1/ getting rid of the Java - Javascript communication (JSObject seems to have heaps of bugs ...)
=> no changes
2/ be careful to close correctly my HttpURLConnection, with a HttpURLConnection.disconnect()
=> no changes
3/ put the morena jars directly on the client side (in the lib/ext directory of the JRE):
the morena API use a native library, and apparently, a native library can not be loaded by 2 different ClassLoader
just to avoid any "java.lang.UnsatisfiedLinkError"
as shown on http://forum.java.sun.com/thread.jspa?forumID=31&threadID=628889
=> no changes
4/ have a closer look on the http apache server, just to get rid of the error
"OS 64)The specified network name is no longer available. : winnt_accept: Asynchronous AcceptEx failed."
as shown on the bug 21425 in http://issues.apache.org/bugzilla/show_bug.cgi?id=21425
=> no changes
5/ use the upgrade version 1.5.0.6 of the JRE
=> no changes
==========
ANY HELP ?
==========
and as usual, I had to fix this problem for yesterday ... :)))
Any ideas about that ?
need more infos ?: just let me know
======================================================================================
Here is the piece of code I use to upload the image from the client to the web server:
======================================================================================
* Upload de cette image sur le serveur, apr�s passage au format JPEG
* @param imageSelectionnee BufferedImage image � transf�rer
* @throws ComposantNumerisationException exception pouvant etre lev� lors de l'upload
public void uploadImage(BufferedImage imageSelectionnee)
throws ComposantNumerisationException {
// connexion http au server
HttpURLConnection connexionServer = null;
// flux de sortie, permettant d'envoyer les donn�es vers le serveur
OutputStream fluxSortie = null;
// parametres pour le libelle de l'exception
ParametresProprietes parametres = null;
// flux d'entr�e, pour lire la r�ponse du serveur
BufferedReader fluxEntree = null;
// r�ponse du serveur
String reponseServeur = null;
// image au format JPEG
BufferedImage imageFormatJPEG = null;
try {
/* conversion de l'image au format JPEG */
imageFormatJPEG = this.formatterImage(imageSelectionnee);
/* ouverture d'une connexion vers le serveur */
connexionServer = this.ouvrirConnexion(imageFormatJPEG);
/* ecriture des donn�es dans le flux de sortie, vers le serveur */
// cr�ation d'un outputStream
fluxSortie = connexionServer.getOutputStream();
// transfert des donn�es vers le serveur
ImageIO.write(imageFormatJPEG, Constantes.TYPE_IMAGE, fluxSortie);
fluxSortie.flush();
/* lecture de la r�ponse du serveur */
// cr�ation d'un flux de lecture sur le flux d'entr�e
fluxEntree = new BufferedReader(new InputStreamReader(
connexionServer.getInputStream()));
// lecture de la r�ponse du serveur
reponseServeur = fluxEntree.readLine();
// v�rification du succes de l'upload, en fonction de la r�ponse du serveur
if (!reponseServeur.startsWith("REPONSE")) {
/* cas ou le message retour ne commence pas par "REPONSE":
* ce n'est pas la r�ponse de la servlet
* => Tomcat nous a redirig� vers la page d'authentification */
fenetreNumerisation.redirigerFenetreAuthentification();
} else if (reponseServeur.compareTo("REPONSE:OK") != 0) {
// la r�ponse du serveur indique qu'il y a eu un probl�me lors de l'upload
throw new IOException(reponseServeur);
} catch (IOException e) {
// cr�ation des parametres pour ce libelle d'erreurs
parametres = new ParametresProprietes();
parametres.ajouterParametre("0", e.toString());
throw new ComposantNumerisationException(
proprietes.getPropriete("ERREUR_UPLOAD", null),
proprietes.getPropriete("ERREUR_UPLOAD_TECH", parametres),
ComposantNumerisationException.ERREUR_NON_BLOCANTE);
} finally {
try {
// fermeture de ce flux de sortie
if (null != fluxSortie) {
fluxSortie.close();
// fermeture du flux de lecture de la reponse
if (null != fluxEntree) {
fluxEntree.close();
} catch (IOException e) {
// fermeture de la connexion
if (null != connexionServer) {
connexionServer.disconnect();
* Ouverture d'une connexion vers la servlet d'upload de l'image
* @param image BufferedImage image � transf�rer
* @return HttpURLConnection une connexion http
* @throws IOException exception IO
* @throws ComposantNumerisationException exception
private HttpURLConnection ouvrirConnexion(BufferedImage image)
throws IOException, ComposantNumerisationException {
// url du server
URL urlServer = null;
// connexion http au server
HttpURLConnection connexionServer = null;
// signature
String signature = null;
// g�n�ration de la signature de l'image � transf�rer
signature = this.genererSignatureImage(image);
// construction de l'url du serveur � appeler pour cet upload
// en incluant un parametre pour transmettre la signature de l'image � transf�rer
// + identifiant du passeport d'urgence courant
urlServer = new URL(this.urlServeur + this.action +
"?" + Constantes.PARAM_SIGNATURE_IMAGE + "=" + signature +
"&" + Constantes.PARAM_IDDEMANDE + "=" + idDemande +
"&" + Constantes.PARAM_CODEMAJ + "=" + codeMaj +
"&" + Constantes.PARAM_TYPEDEMANDE + "=" + typeDemande);
if (null == urlServer) {
throw new IOException(proprietes.getPropriete(
"ERREUR_UPLOAD_CREATION_URL_SERVEUR", null));
// ouverture d'une connexion http, gr�ce a cette url du server
connexionServer = (HttpURLConnection) urlServer.openConnection();
if (null == connexionServer) {
throw new IOException(proprietes.getPropriete(
"ERREUR_UPLOAD_OUVERTURE_CONNEXION_SERVEUR", null));
// param�trage de cette connexion
// m�thode de transmission = POST
connexionServer.setRequestMethod("POST");
// autorisation de lire les donn�es venant du serveur
connexionServer.setDoInput(true);
// autorisation d'�crire des donn�es vers le serveur
connexionServer.setDoOutput(true);
// pas d'utilisation de caches
connexionServer.setUseCaches(false);
connexionServer.setDefaultUseCaches(false);
// sp�cification du type des donn�es que l'on envoie vers le serveur
connexionServer.setRequestProperty("content-type", "img/jpeg");
return connexionServer;
}=======================================================================================
Here is the piece of code I use on server side to get the scaned image from the client:
=======================================================================================
* Lecture des donn�es en provenance de l'applet
* @param request HttpServletRequest
* @return ByteArrayOutputStream buffer contenant les donn�es lues
* @throws TechnicalException exception
* @throws FunctionalException si erreur fonctionnelle
private ByteArrayOutputStream lireDonnees(HttpServletRequest request)
throws FunctionalException, TechnicalException {
// stream de sortie sur l'image
ByteArrayOutputStream baos = null;
// id du passeport d'urgence au format Integer
// image issue de l'applet
BufferedImage image = null;
try {
/* r�cup�ration de l'image */
image = ImageIO.read(request.getInputStream());
if (null == image) {
logger.error(THIS_CLASS + Libelles.getLibelle("ERR-TEC-16", null));
throw new TechnicalException(new ErreurVO("ERR-TEC-16",
null, "", true, false, false));
} catch (IllegalArgumentException e) {
logger.error(THIS_CLASS + Libelles.getLibelle("ERR-TEC-13", null));
throw new TechnicalException(new ErreurVO("ERR-TEC-13",
null, "", true, false, false));
} catch (IOException e) {
logger.error(THIS_CLASS + Libelles.getLibelle("ERR-TEC-16", null));
throw new TechnicalException(new ErreurVO("ERR-TEC-16",
null, "", true, false, false));
return baos;
* Ecriture de la reponse � envoyer � l'applet
* @param response HttpServletResponse
* @param erreur Message d'erreur
* @throws IOException exception
private void ecrireReponse(HttpServletResponse response, String erreur) throws IOException {
// r�ponse � envoyer � l'applet
String reponseServer = null;
// flux de reponse
PrintWriter fluxReponse = null;
response.setContentType("text/html");
// construction de la r�ponse � envoyer � l'applet
if (null == erreur) {
reponseServer = "REPONSE:OK";
} else {
/* cas ou il y a eu une exception lev�e lors de la reception des donn�es */
reponseServer = "REPONSE:ERREUR:" + erreur;
if (logger.isDebugEnabled()) {
logger.debug(THIS_CLASS +
"Envoie de la r�ponse � l'applet, indiquant si l'upload s'est bien d�roul�: " +
reponseServer);
//envoie de la r�ponse a l'applet
fluxReponse = response.getWriter();
fluxReponse.println(reponseServer);
fluxReponse.close();
}==============================================================================
here is the traces I get when the applet doesn't work, through a VSAT network:
==============================================================================
Java Plug-in 1.5.0_01
Utilisation de la version JRE 1.5.0_01 Java HotSpot(TM) Client VM
R�pertoire d'accueil de l'utilisateur = C:\Documents and Settings\assistw
network: Chargement de la configuration du proxy d�finie par l'utilisateur ...
network: Termin�.
network: Chargement de la configuration du proxy � partir de Netscape Navigator ...
network: Erreur lors de la lecture du fichier de registre : C:\Documents and Settings\assistw\Application Data\Mozilla\registry.dat
network: Termin�.
network: Chargement de la configuration proxy du navigateur ...
network: Termin�.
network: Configuration du proxy : Configuration du proxy du navigateur
basic: Le cache est d�sactiv� par l'utilisateur
c: effacer la fen�tre de la console
f: finaliser les objets de la file d'attente de finalisation
g: lib�rer la m�moire
h: afficher ce message d'aide
l: vider la liste des chargeurs de classes
m: imprimer le relev� d'utilisation de la m�moire
o: d�clencher la consignation
p: recharger la configuration du proxy
q: masquer la console
r: recharger la configuration des politiques
s: vider les propri�t�s syst�me et d�ploiement
t: vider la liste des threads
v: vider la pile des threads
x: effacer le cache de chargeurs de classes
0-5: fixer le niveau de tra�age � <n>
basic: R�cepteur de modalit�s enregistr�
basic: R�f�rence au chargeur de classes : sun.plugin.ClassLoaderInfo@b30913, refcount=1
basic: R�cepteur de progression ajout� : sun.plugin.util.GrayBoxPainter@77eaf8
basic: Chargement de l'applet...
basic: Initialisation de l'applet...
basic: D�marrage de l'applet...
network: Connexion de http://rma_phileas/Client/html/composants/scanner/SAppletNumerisation.jar avec proxy=DIRECT
network: Connexion http://rma_phileas/Client/html/composants/scanner/SAppletNumerisation.jar avec cookie ":::langueSettings:::=FR; :::menuSettings_gabaritMaquette:::=%3CSETTINGS%3E%3CVERSION%3EVersion%201.2-Utilisateur%3C/VERSION%3E%3CINDEX_ITEM1%3E0%3C/INDEX_ITEM1%3E%3CINDEX_ITEM2%3E0%3C/INDEX_ITEM2%3E%3CINDEX_ITEM3%3Enull%3C/INDEX_ITEM3%3E%3C/SETTINGS%3E; JSESSIONID=D064486FD6C7CC17E7B256B66965FFEE"
security: Acc�s aux cl�s et au certificat dans le profil utilisateur Mozilla : null
security: Chargement des certificats AC racine depuis C:\PROGRA~1\Java\JRE15~1.0_0\lib\security\cacerts
security: Certificats AC racine charg�s depuis C:\PROGRA~1\Java\JRE15~1.0_0\lib\security\cacerts
security: Chargement des certificats JPI depuis C:\Documents and Settings\assistw\Application Data\Sun\Java\Deployment\security\trusted.certs
security: Certificats JPI charg�s depuis C:\Documents and Settings\assistw\Application Data\Sun\Java\Deployment\security\trusted.certs
security: Chargement des certificats JPI depuis C:\PROGRA~1\Java\JRE15~1.0_0\lib\security\trusted.certs
security: Certificats JPI charg�s depuis C:\PROGRA~1\Java\JRE15~1.0_0\lib\security\trusted.certs
security: Chargement des certificats depuis la zone de stockage des certificats de session JPI
security: Certificats charg�s depuis la zone de stockage des certificats de session JPI
security: Recherche du certificat dans le magasin de certificats permanent JPI
security: Recherche du certificat dans la zone de stockage des certificats de session JPI
security: Obtenir l'objet de stockage des cl�s de la zone de stockage des certificats AC racine
security: Obtenir l'objet de stockage des cl�s de la zone de stockage des certificats AC racine
security: Recherche du certificat dans la zone de stockage des certificats AC racine
security: D�terminer si le certificat peut �tre v�rifi� � l'aide des certificats de la zone de stockage des certificats AC racine
... [check certifications]
sun.misc.Launcher$ExtClassLoader@92e78c
<no principals>
java.security.Permissions@157b46f (
(java.lang.RuntimePermission stopThread)
(java.security.AllPermission <all permissions> <all actions>)
(java.io.FilePermission \C:\Program Files\Java\jre1.5.0_01\lib\ext\sunjce_provider.jar read)
(java.util.PropertyPermission java.version read)
(java.util.PropertyPermission java.vm.name read)
(java.util.PropertyPermission java.vm.vendor read)
(java.util.PropertyPermission os.name read)
(java.util.PropertyPermission java.vendor.url read)
(java.util.PropertyPermission java.vm.specification.vendor read)
(java.util.PropertyPermission java.specification.vendor read)
(java.util.PropertyPermission os.version read)
(java.util.PropertyPermission java.specification.name read)
(java.util.PropertyPermission java.class.version read)
(java.util.PropertyPermission file.separator read)
(java.util.PropertyPermission java.vm.version read)
(java.util.PropertyPermission os.arch read)
(java.util.PropertyPermission java.vm.specification.name read)
(java.util.PropertyPermission java.vm.specification.version read)
(java.util.PropertyPermission java.specification.version read)
(java.util.PropertyPermission java.vendor read)
(java.util.PropertyPermission path.separator read)
(java.util.PropertyPermission line.separator read)
(java.net.SocketPermission localhost:1024- listen,resolve)
... [check certifications]
security: La v�rification du certificat � l'aide des certificats AC racine a �chou�
security: Aucune information d'horodatage disponible
basic: Modalit� empil�e
basic: Modalit� d�sempil�e
basic: Utilisateur s�lectionn� : 0
security: L'utilisateur a accord� les droits d'acc�s au code pour cette session seulement
security: Ajout du certificat dans la zone de stockage des certificats de session JPI
security: Certificat ajout� dans la zone de stockage des certificats de session JPI
security: Enregistrement des certificats dans la zone de stockage des certificats de session JPI
security: Certificats enregistr�s dans la zone de stockage des certificats de session JPI
... [check certifications]
sun.plugin.security.PluginClassLoader@10fe2b9
<no principals>
java.security.Permissions@fe315d (
(java.lang.RuntimePermission accessClassInPackage.sun.audio)
(java.lang.RuntimePermission stopThread)
(java.security.AllPermission <all permissions> <all actions>)
(java.util.PropertyPermission java.version read)
(java.util.PropertyPermission java.vm.name read)
(java.util.PropertyPermission javaplugin.version read)
(java.util.PropertyPermission java.vm.vendor read)
(java.util.PropertyPermission os.name read)
(java.util.PropertyPermission java.vendor.url read)
(java.util.PropertyPermission java.vm.specification.vendor read)
(java.util.PropertyPermission java.specification.vendor read)
(java.util.PropertyPermission os.version read)
(java.util.PropertyPermission browser.vendor read)
(java.util.PropertyPermission java.specification.name read)
(java.util.PropertyPermission java.class.version read)
(java.util.PropertyPermission file.separator read)
(java.util.PropertyPermission browser.version read)
(java.util.PropertyPermission java.vm.version read)
(java.util.PropertyPermission os.arch read)
(java.util.PropertyPermission browser read)
(java.util.PropertyPermission java.vm.specification.name read)
(java.util.PropertyPermission java.vm.specification.version read)
(java.util.PropertyPermission java.specification.version read)
(java.util.PropertyPermission java.vendor read)
(java.util.PropertyPermission path.separator read)
(java.util.PropertyPermission http.agent read)
(java.util.PropertyPermission line.separator read)
(java.net.SocketPermission rma_phileas connect,accept,resolve)
(java.net.SocketPermission localhost:1024- listen,resolve)
... [check certifications]
sun.misc.Launcher$ExtClassLoader@92e78c
<no principals>
java.security.Permissions@bd09e8 (
(java.lang.RuntimePermission stopThread)
(java.security.AllPermission <all permissions> <all actions>)
(java.io.FilePermission \C:\Program Files\Java\jre1.5.0_01\lib\ext\Smorena.jar read)
(java.util.PropertyPermission java.version read)
(java.util.PropertyPermission java.vm.name read)
(java.util.PropertyPermission java.vm.vendor read)
(java.util.PropertyPermission os.name read)
(java.util.PropertyPermission java.vendor.url read)
(java.util.PropertyPermission java.vm.specification.vendor read)
(java.util.PropertyPermission java.specification.vendor read)
(java.util.PropertyPermission os.version read)
(java.util.PropertyPermission java.specification.name read)
(java.util.PropertyPermission java.class.version read)
(java.util.PropertyPermission file.separator read)
(java.util.PropertyPermission java.vm.version read)
(java.util.PropertyPermission os.arch read)
(java.util.PropertyPermission java.vm.specification.name read)
(java.util.PropertyPermission java.vm.specification.version read)
(java.util.PropertyPermission java.specification.version read)
(java.util.PropertyPermission java.vendor read)
(java.util.PropertyPermission path.separator read)
(java.util.PropertyPermission line.separator read)
(java.net.SocketPermission localhost:1024- listen,resolve)
scl:
Morena - Image Acquisition Framework version 6.2.0.0.
Copyright (c) Gnome s.r.o. 1999-2004. All rights reserved.
Licensed to "XXX".
network: Connexion de http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageInputStreamSpi avec proxy=DIRECT
network: Connexion http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageInputStreamSpi avec cookie ":::langueSettings:::=FR; :::menuSettings_gabaritMaquette:::=%3CSETTINGS%3E%3CVERSION%3EVersion%201.2-Utilisateur%3C/VERSION%3E%3CINDEX_ITEM1%3E0%3C/INDEX_ITEM1%3E%3CINDEX_ITEM2%3E0%3C/INDEX_ITEM2%3E%3CINDEX_ITEM3%3Enull%3C/INDEX_ITEM3%3E%3C/SETTINGS%3E; JSESSIONID=D064486FD6C7CC17E7B256B66965FFEE"
network: Connexion de http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageOutputStreamSpi avec proxy=DIRECT
network: Connexion http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageOutputStreamSpi avec cookie ":::langueSettings:::=FR; :::menuSettings_gabaritMaquette:::=%3CSETTINGS%3E%3CVERSION%3EVersion%201.2-Utilisateur%3C/VERSION%3E%3CINDEX_ITEM1%3E0%3C/INDEX_ITEM1%3E%3CINDEX_ITEM2%3E0%3C/INDEX_ITEM2%3E%3CINDEX_ITEM3%3Enull%3C/INDEX_ITEM3%3E%3C/SETTINGS%3E; JSESSIONID=D064486FD6C7CC17E7B256B66965FFEE"
network: Connexion de http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageTranscoderSpi avec proxy=DIRECT
network: Connexion http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageTranscoderSpi avec cookie ":::langueSettings:::=FR; :::menuSettings_gabaritMaquette:::=%3CSETTINGS%3E%3CVERSION%3EVersion%201.2-Utilisateur%3C/VERSION%3E%3CINDEX_ITEM1%3E0%3C/INDEX_ITEM1%3E%3CINDEX_ITEM2%3E0%3C/INDEX_ITEM2%3E%3CINDEX_ITEM3%3Enull%3C/INDEX_ITEM3%3E%3C/SETTINGS%3E; JSESSIONID=D064486FD6C7CC17E7B256B66965FFEE"
network: Connexion de http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageReaderSpi avec proxy=DIRECT
network: Connexion http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageReaderSpi avec cookie ":::langueSettings:::=FR; :::menuSettings_gabaritMaquette:::=%3CSETTINGS%3E%3CVERSION%3EVersion%201.2-Utilisateur%3C/VERSION%3E%3CINDEX_ITEM1%3E0%3C/INDEX_ITEM1%3E%3CINDEX_ITEM2%3E0%3C/INDEX_ITEM2%3E%3CINDEX_ITEM3%3Enull%3C/INDEX_ITEM3%3E%3C/SETTINGS%3E; JSESSIONID=D064486FD6C7CC17E7B256B66965FFEE"
network: Connexion de http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageWriterSpi avec proxy=DIRECT
network: Connexion http://rma_phileas/Client/html/composants/scanner/META-INF/services/javax.imageio.spi.ImageWriterSpi avec cookie ":::langueSettings:::=FR; :::menuSettings_gabaritMaquette:::=%3CSETTINGS%3E%3CVERSION%3EVersion%201.2-Utilisateur%3C/VERSION%3E%3CINDEX_ITEM1%3E0%3C/INDEX_ITEM1%3E%3CINDEX_ITEM2%3E0%3C/INDEX_ITEM2%3E%3CINDEX_ITEM3%3Enull%3C/INDEX_ITEM3%3E%3C/SETTINGS%3E; JSESSIONID=D064486FD6C7CC17E7B256B66965FFEE"
network: Connexion de http://rma_phileas/Client/flux/protected/uploadimage.do?signature=c07690c12904320a253cbdeeded59238&idDemande=7&codeMaj=1133967329473&typeDemande=PU avec proxy=DIRECT
network: Connexion http://rma_phileas/Client/flux/protected/uploadimage.do?signature=c07690c12904320a253cbdeeded59238&idDemande=7&codeMaj=1133967329473&typeDemande=PU avec cookie ":::langueSettings:::=FR; :::menuSettings_gabaritMaquette:::=%3CSETTINGS%3E%3CVERSION%3EVersion%201.2-Utilisateur%3C/VERSION%3E%3CINDEX_ITEM1%3E0%3C/INDEX_ITEM1%3E%3CINDEX_ITEM2%3E0%3C/INDEX_ITEM2%3E%3CINDEX_ITEM3%3Enull%3C/INDEX_ITEM3%3E%3C/SETTINGS%3E; JSESSIONID=D064486FD6C7CC17E7B256B66965FFEE"
basic: Arr�t de l'applet...
basic: R�cepteur de progression supprim� : sun.plugin.util.GrayBoxPainter@77eaf8
basic: Jonction du thread d'applet...
basic: Destruction de l'applet...
basic: Elimination de l'applet...
basic: Sortie de l'applet...
basic: Thread d'applet joint...
basic: R�cepteur de modalit�s non enregistr�
basic: Recherche d'informations...
basic: Lib�ration du chargeur de classes : sun.plugin.ClassLoaderInfo@b30913, refcount=0
basic: Mise en cache du chargeur de classes : sun.plugin.ClassLoaderInfo@b30913
basic: Taille de cache du chargeur de classes courant : 1
basic: Termin�...
basic: R�cepteur de modalit�s enregistr�
basic: R�f�rence au chargeur de classes : sun.plugin.ClassLoaderInfo@b30913, refcount=1
basic: R�cepteur de progression ajout� : sun.plugin.util.GrayBoxPainter@1e16483
basic: Chargement de l'applet...
basic: Initialisation de l'applet...
basic: D�marrage de l'applet...
network: Connexion de http://rma_phileas/Client/html/composants/scanner/SAppletNumerisation.jar avec proxy=DIRECT
network: Connexion http://rma_phileas/Client/html/composants/scanner/SAppletNumerisation.jar avec cookie ":::langueSettings:::=FR; :::menuSettings_gabaritMaquette:::=%3CSETTINGS%3E%3CVERSION%3EVersion%201.2-Utilisateur%3C/VERSION%3E%3CINDEX_ITEM1%3E0%3C/INDEX_ITEM1%3E%3CINDEX_ITEM2%3E0%3C/INDEX_ITEM2%3E%3CINDEX_ITEM3%3Enull%3C/INDEX_ITEM3%3E%3C/SETTINGS%3E; JSESSIONID=D064486FD6C7CC17E7B256B66965FFEE"A workaround would be: don't use IE9. You want a solution, not a workaround.
I think at this juncture you are best of creating a new bug report and be sure to reference the old closed one. It doesn't look entirely related though, your symptoms are different from what is described in it (freeze VS a crash). You tried this on several systems right? Also on machines on a different network?
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7072601 -
Problems with pacman applet, and advice on a gaming portfolio
Hi
I recently made a pacman applet, im having a few problems with it though, the first time the applet is run on a browser, the ghosts(represented by squares) often dont appear or if they do, they are stuck in walls, this never happens when i run offline on my computer. Is this because the very first time the applet is run, it doesnt load properly, but the second time some of the files are in the cache so it loads fully?
Also everytime i refresh the browser the applet dissapears and is replaced with a blank space and a cross in the top left hand corner, does anyone know the reason for this?
The applet can be found below, if you do decide to play it, please bear in mind what i have said, so it might not load correctly the first time, if this is the case please refresh, or close the broswer and reopen the link! Also you will need to click the applet for it to gain focus before you can move pacman - use the arrow keys the control pacman.
http://www.renaissance-designs.co.uk/Satwant/java/pacman/
Id also be very gratful for some advice - id like a change in career, ive always wanted to get into gaming, ive had some previous knowledge in java i made a programme that could generate its own poetry in java for my dissatation, but i still never had a huge amount of confidence, and so went into websites.
BUT now i have decided to take the leap back into programming and give it a go, which is why ive made this game.
I thought id make a portfolio and try and apply for a few gaming jobs. This applet took me two weeks to make and it was in my spare time, i am fully aware its not perfect, and it doesnt look great, but i would like to know what people think of it, also how many more games do you think i should make, before i apply for gaming jobs? Does anyone have any advice on what would make a good portfolio for a java gaming job?
Thanks alot, i look forward to what you think of the game, and your advice!
SSKenthsskenth wrote:
Thanks for getting back to me with that information, i didnt know you could see that information with just a simple right click!
But im afraid that doesnt really help me solve the problem, im not sure what all of that information means! :SI have very little experience with applets, but I can tell you what I would do to debug this (forgive me if you already know this stuff).
Look at the stack trace you get in the Java Console that I posted earlier. Each line contains a method that was called from the method on the previous line. So, java.lang.Thread.run() called sun.applet.AppletPanel.run(), which called Room.init(), etc. Look at the topmost line whose method is something you wrote, not something in the standard Java libraries. In your case it looks like PaintSurface.java (specifically, line 22). Look at what line 22 of PaintSurface.java is doing, it's calling Thread.start(). If you check out the Javadoc for Thread.start(), it says IllegalThreadStateException gets thrown if you call start() on a thread that has already started. So that's your problem. Without looking at your code, I'd assume you want to stop your thread in your applet's destroy() override, and instead of reusing it, create a new one each time init() is called.
Ill try and look into, thanks again though, it gives me somthing to work with :D
Btw when you first ran the applet, did all the ghosts(3) load up correctly?Unfortunately, no. The first time I ran it, there was only 1 ghost (or maybe all 3 overlapping each other?) at the top of the screen, and they never moved. Refreshing once made the game play as I think you want it to. Refreshing a third time gave the dreaded red X.
...oh and just out of curiosity,,, did u have fun playing the game :DSure did. -
Java.awt.createFont(...) in Applet
I'm trying to dynamically load a truetype-font in an applet with Font.createFont(...) .
Unfortunately I'm always getting
java.lang.SecurityException: Unable to create temporary fileAnd, surprise, surprise, Font.createFont() requires a temporary file wich I found not to be documented in javadoc but in the source of Font.java (see last line of the next code example):
public static Font createFont ( int fontFormat, InputStream fontStream )
throws java.awt.FontFormatException, java.io.IOException {
if ( fontFormat != Font.TRUETYPE_FONT ) {
throw new IllegalArgumentException ( "font format not recognized" );
File fontFile = null;
fontFile = File.createTempFile ( "font", ".ttf", null );Has anybody faced the same problem or an idea of how to solve this issue with little additional work?has really nobody got an idea?
-
JLable components not being displayed in the panel of the applet
I am having the problem with the display of the JLabel components in the Panel component of the Applet.
The JLabel components do not appear in the Panel of the applet unless i minimize or maximize the applet.hello...
i just had the same problem... it was solved by using the .updateUI() method.
in my case several textFields were dynamically added to a jpanel, there we called the method on that panel.
ptf.updateUI();
hope it works.
----------++-----+
...algun dia todos seremos luz...
-zoe
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