Java.policy code delays JVM loading

Hello All!!
My java.policy code has 46 grant lines due to different permissions of different applets and servers.
When I want to run some of this applets I've a delay of 90 seconds to load the JVM.
I think I'm verifying that exist all of my servers in java.policy because i've a very high delay, but I think it wouldn't be that way.
My questions are: will do I encrease the delay if I encrease the number of applets or servers? I'm working with JDK1.3, does anybody knows if this verssion is limited?

Nowhere. Use the -Xbootclasspath option of 'java'.

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Attach java imported codes to jvm pool process

Hi,
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Java takes too long to load if java.policy has many grants to http URLs

I am facing a nasty issue with trying to secure the Java browser plugin using the java.policy file. Some jars cause the JVM to stall for a time that is directly proportional to the size of the java.policy file.
The entries inside our java.policy look like this:
*grant codeBase "http://some.site.local:port/-" { permission java.security.AllPermission; };*
The more entries I add to this file, the slower the performance gets (as of java loading time). Using -Djava.security.debug=all I found that the timeout is 4.5 seconds for every grant in the java.policy. The log output just before the delay looks like this:
policy: evaluate codesources:
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*Active CodeSource: (http://wassup/wassup.jar [*
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This old thread suggests this is a DNS/Netbios lookup timeout. However, Wireshark does not show any such traffic. Our DNS server does reply quickly, both on failure and success. http://192.9.162.102/thread.jspa?threadID=5250986&messageID=10039588
When I use the remote http://mindprod.com/applet/wassup.html there is no delay. The only difference I can see is that the remote JAR is always loaded via http, while the local jar is cached. Remote jar:
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Content-Encoding: null
Local jar:
network: Connecting http://wassup/wassup.jar with proxy=DIRECT
network: Connecting http://wassup:80/ with proxy=DIRECT
network: ResponseCode for http://wassup/wassup.jar : 304
network: Encoding for http://wassup/wassup.jar : null
network: Disconnect connection to http://wassup/wassup.jar
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I am using 1.6.0u22 at the moment. Is there anything I can do to fix this?

>
Try putting the domain names in the Windows hosts files with their numeric addresses. That should bypass any DNS lookup. If you have central maintenance you can update all the hosts files when IP address change.
We have considered this option, but then we have the same problem described on c). IP maintentance. IPs change often and we cannot control it.
Malcolmmc, paul.miner, jschell,
I think the problem is Netbios resolution, rather than DNS one. The sites that figure on java.policy file, are not available in terms of Netbios (they are not LAN clients), so they are only visibles on DNS resolution. But Java still tries to resolve them with Netbios first, so I think there's a timeout on this resolution (not the DNS one) . This timeout causes the problem.
But, anyway .... Why is Java trying to resolve those names ??? In fact, Java will only have to match the site you are visiting with the site specified on java.policy (just a String comparison). Why does Java need to resolve (netbios & dns) the names on java.policy? I cannot figure out why.
Thank you all.
Marc

Java takes too long to load if java.policy has many sites to grant acess to

The problem is that we noticed that the time Java takes to load when it's invoked by any applet from the very first time on IE, is directly proportional to the size of the java.policy file.
You can have many sites to grant access to inside your java.policy file. As you know, it's typically done like this:
grant codeBase "http://<url>/<dir>/*" {
permission java.security.AllPermission;
The more entries I add to this file, the slower the performance gets (as of java loading time).
We have more than 10 entries on our java.policy file, and we are getting a 40-seconds penalty time each time java is loading.
Having gone further with this problem, we have discovered that time is being lost when Java is trying to resolve (netBios and DNS) ALL of the sites specified on the java.policy file, BEFORE running any applet of ANY site (when Java loads). We cannot understand why Java is trying to resolve those names, even though you are not trying to visit them....
Is there a workaround for this issue ?
We've tried to:
a) Use IP's instead of names on the java.policy: this resolves the problem but it creates another one: IP maintenance. It's not applicable because IP's can change without notice.
b) Use more patterns like "*", for example:
grant codeBase "http://*mysit*/<dir>/*" {
so that Java will not be able to "guess" the name, nor resolve it.
But unfortunately, this didn't work :-(
c) Include the java.policy file on each applet (inside the jar file), instead of an unique java.policy file on each Windows machine. This solution doesn't fit our requirements, because we cannot ask applications to manage their own permissions. We want to control them with an unique & protected & secured java.policy file.
d) Sign applets: Same reason of c)
Is there a workaround for this issue ?
We need Java to load in few seconds, but mantain java.policy funcionality.
Thank you.
Marc.

>
Try putting the domain names in the Windows hosts files with their numeric addresses. That should bypass any DNS lookup. If you have central maintenance you can update all the hosts files when IP address change.
We have considered this option, but then we have the same problem described on c). IP maintentance. IPs change often and we cannot control it.
Malcolmmc, paul.miner, jschell,
I think the problem is Netbios resolution, rather than DNS one. The sites that figure on java.policy file, are not available in terms of Netbios (they are not LAN clients), so they are only visibles on DNS resolution. But Java still tries to resolve them with Netbios first, so I think there's a timeout on this resolution (not the DNS one) . This timeout causes the problem.
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Thank you all.
Marc

How do I run multiple java apps in one JVM to reduce memory use?

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<pre>
import java.util.Properties;
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.util.Enumeration;
import java.util.NoSuchElementException;
public class RunProg implements Runnable, Cloneable
private String iProg;
private String iArgs[];
public static void main(String args[])
new RunProg().main();
// first step is to start main program itself
private void main()
Properties properties = System.getProperties();
try
properties.load(new FileInputStream("RunProg.properties"));
catch(IOException e)
System.setProperties(properties);
int i = 0;
System.out.println("enter main, activeCount=" + Thread.activeCount());
while(true)
String program = properties.getProperty("Prog" + i);
if(program == null)
break;
StringTokenizer st = new StringTokenizer(program);
String[] args = new String[st.countTokens() - 1];
try
RunProg rp = (RunProg)this.clone();
rp.iProg = st.nextToken();
for(int j = 0; st.hasMoreTokens(); j++)
     args[j] = st.nextToken();
rp.iArgs = args;
Thread th = new Thread(rp);
th.setName("prog" + i + "=" + program);
th.start();
System.out.println("prog" + i + "=" + program + ", started");
catch(CloneNotSupportedException e)
System.out.println("prog" + i + "=" + program + ", can't start");
i++;
     System.out.println("end of main, activeCount=" + Thread.activeCount());
// next step is to start all others one by one
public void run()
try
Class c = Class.forName(iProg);
Class p[] = new Class[1];
p[0] = String[].class;
Method m = c.getMethod("main", p);
Object o[] = new Object[1];
o[0] = iArgs;
m.invoke(null, o);
catch(ClassNotFoundException e)
System.out.println(iProg + "ClassNotFoundException");
catch(NoSuchMethodException e)
System.out.println(iProg + "NoSuchMethodException");
catch(InvocationTargetException e)
System.out.println(iProg + "NoSuchMethodException");
catch(IllegalAccessException e)
System.out.println(iProg + "NoSuchMethodException");
System.out.println(Thread.currentThread().getName() + ", ended");
System.out.println("exit run, activeCount=" + Thread.activeCount());
// setup SecurityManager to disable method System.exit()
public RunProg()
     SecurityManager sm = new mySecurityManager();
     System.setSecurityManager(sm);
// inner-class to disable method System.exit()
protected class mySecurityManager extends SecurityManager
     public void checkExit(int status)
          super.checkExit(status);
          Thread.currentThread().stop();
          throw new SecurityException();
* inner-class to analyze StringTokenizer. This class is enhanced to check double Quotation marks
protected class StringTokenizer implements Enumeration
private int currentPosition;
private int maxPosition;
private String str;
private String delimiters;
private boolean retTokens;
* Constructs a string tokenizer for the specified string. All
* characters in the <code>delim</code> argument are the delimiters
* for separating tokens.
* <p>
* If the <code>returnTokens</code> flag is <code>true</code>, then
* the delimiter characters are also returned as tokens. Each
* delimiter is returned as a string of length one. If the flag is
* <code>false</code>, the delimiter characters are skipped and only
* serve as separators between tokens.
* @param str a string to be parsed.
* @param delim the delimiters.
* @param returnTokens flag indicating whether to return the delimiters
* as tokens.
public StringTokenizer(String str, String delim, boolean returnTokens)
currentPosition = 0;
this.str = str;
maxPosition = str.length();
delimiters = delim;
retTokens = returnTokens;
* Constructs a string tokenizer for the specified string. The
* characters in the <code>delim</code> argument are the delimiters
* for separating tokens. Delimiter characters themselves will not
* be treated as tokens.
* @param str a string to be parsed.
* @param delim the delimiters.
public StringTokenizer(String str, String delim)
this(str, delim, false);
* Constructs a string tokenizer for the specified string. The
* tokenizer uses the default delimiter set, which is
* <code>"\t\n\r\f"</code>: the space character, the tab
* character, the newline character, the carriage-return character,
* and the form-feed character. Delimiter characters themselves will
* not be treated as tokens.
* @param str a string to be parsed.
public StringTokenizer(String str)
this(str, " \t\n\r\f", false);
* Skips delimiters.
protected void skipDelimiters()
while(!retTokens &&
(currentPosition < maxPosition) &&
(delimiters.indexOf(str.charAt(currentPosition)) >= 0))
currentPosition++;
* Tests if there are more tokens available from this tokenizer's string.
* If this method returns <tt>true</tt>, then a subsequent call to
* <tt>nextToken</tt> with no argument will successfully return a token.
* @return <code>true</code> if and only if there is at least one token
* in the string after the current position; <code>false</code>
* otherwise.
public boolean hasMoreTokens()
skipDelimiters();
return(currentPosition < maxPosition);
* Returns the next token from this string tokenizer.
* @return the next token from this string tokenizer.
* @exception NoSuchElementException if there are no more tokens in this
* tokenizer's string.
public String nextToken()
skipDelimiters();
if(currentPosition >= maxPosition)
throw new NoSuchElementException();
int start = currentPosition;
boolean inQuotation = false;
while((currentPosition < maxPosition) &&
(delimiters.indexOf(str.charAt(currentPosition)) < 0 || inQuotation))
if(str.charAt(currentPosition) == '"')
inQuotation = !inQuotation;
currentPosition++;
if(retTokens && (start == currentPosition) &&
(delimiters.indexOf(str.charAt(currentPosition)) >= 0))
currentPosition++;
String s = str.substring(start, currentPosition);
if(s.charAt(0) == '"')
s = s.substring(1);
if(s.charAt(s.length() - 1) == '"')
s = s.substring(0, s.length() - 1);
return s;
* Returns the next token in this string tokenizer's string. First,
* the set of characters considered to be delimiters by this
* <tt>StringTokenizer</tt> object is changed to be the characters in
* the string <tt>delim</tt>. Then the next token in the string
* after the current position is returned. The current position is
* advanced beyond the recognized token. The new delimiter set
* remains the default after this call.
* @param delim the new delimiters.
* @return the next token, after switching to the new delimiter set.
* @exception NoSuchElementException if there are no more tokens in this
* tokenizer's string.
public String nextToken(String delim)
delimiters = delim;
return nextToken();
* Returns the same value as the <code>hasMoreTokens</code>
* method. It exists so that this class can implement the
* <code>Enumeration</code> interface.
* @return <code>true</code> if there are more tokens;
* <code>false</code> otherwise.
* @see java.util.Enumeration
* @see java.util.StringTokenizer#hasMoreTokens()
public boolean hasMoreElements()
return hasMoreTokens();
* Returns the same value as the <code>nextToken</code> method,
* except that its declared return value is <code>Object</code> rather than
* <code>String</code>. It exists so that this class can implement the
* <code>Enumeration</code> interface.
* @return the next token in the string.
* @exception NoSuchElementException if there are no more tokens in this
* tokenizer's string.
* @see java.util.Enumeration
* @see java.util.StringTokenizer#nextToken()
public Object nextElement()
return nextToken();
* Calculates the number of times that this tokenizer's
* <code>nextToken</code> method can be called before it generates an
* exception. The current position is not advanced.
* @return the number of tokens remaining in the string using the current
* delimiter set.
* @see java.util.StringTokenizer#nextToken()
public int countTokens()
int count = 0;
int currpos = currentPosition;
while(currpos < maxPosition)
* This is just skipDelimiters(); but it does not affect
* currentPosition.
while(!retTokens &&
(currpos < maxPosition) &&
(delimiters.indexOf(str.charAt(currpos)) >= 0))
currpos++;
if(currpos >= maxPosition)
break;
int start = currpos;
boolean inQuotation = false;
while((currpos < maxPosition) &&
(delimiters.indexOf(str.charAt(currpos)) < 0 || inQuotation))
if(str.charAt(currpos) == '"')
inQuotation = !inQuotation;
currpos++;
if(retTokens && (start == currpos) &&
(delimiters.indexOf(str.charAt(currpos)) >= 0))
currpos++;
count++;
return count;
</pre>
RunProg.properties like this:
Prog1=GetEnv 47838 837489 892374 839274
Prog0=GetEnv "djkfds dfkljsd" dsklfj

File Access with unsigned Applet through editing the java.policy file

I'am starting to lose my hair on this...
I am trying to get an applet to run so that it can access the file system to move files on my local maschin. Because this applet is only running on my VM i can change the java.policy to avoid the signing of the applet.
first of all, if i wrote in the java.policy file
grant {
permission java.security.AllPermission;
};everything is working perfekt.
But I have not the intention to open the gates for any applet out there, so i want to limit the access to my applet. With every of the following versions I get at best an
java.security.AccessControlException: access denied (java.io.FilePermission...
My Setup
My Java Version: jre1.6.0_02
My applet is located unter the url
http://admin.mydomain.com/applet.jar
In Html i tryed the following different versions of loading the applet - none worked
<applet codebase="http://admin.mydomain.com/" name="shortcut" code="start.class" archive="applet.jar" width="0" height="0"></applet>
<applet codebase="http://admin.mydomain.com" name="shortcut" code="start.class" archive="applet.jar" width="0" height="0"></applet>
<applet name="shortcut" code="start.class" archive="http://admin.mydomain.com/applet.jar" width="0" height="0"></applet>in java.policy i tryed following versions with every html applet load version
grant codeBase "http://admin.x-press.de/-" {
permission java.security.AllPermission;
grant codeBase "http://admin.x-press.de/+" {
permission java.security.AllPermission;
grant codeBase "http://admin.x-press.de/applet.jar" {
permission java.security.AllPermission;
};why is it with
grant {
permission java.security.AllPermission;
};working, and not with the other versions?
i am almost bold now, please try to save my last hair from falling down.
any suggestion would be nice
thanks, feyyaz
Message was edited by:
feyyazdogu

I read the mentioned documentation and your right, some of my versions were wrong, but after reading the doumentation again i came to following result which should had worked but didn't.
java.policy
grant codeBase "http://admin.mydomain.com/*" {
permission java.security.AllPermission;
HTML File
<applet codebase="http://admin.mydomain.com/" name="shortcut" code="start.class" archive="applet.jar" height="0" width="0"></applet>if I am entering http://admin.mydomain.com/applet.jar i can download the jar, so the archive lays in the correct directory.
what i am doing wrong? do i have to change an additional file somewhere else?

ClassLoader & java.policy

Hi ,
I am facing problem with the following code.
ClassLoader loaderPrev = Thread.currentThread().getContextClassLoader();
ClassLoader loader = URLClassLoader.newInstance(new URL[]{new URL(CodeBase)} , loaderPrev );
ClassLoader loader = new URLClassLoader(urlList);
Thread.currentThread().setContextClassLoader(loader) ;
result = Thread.currentThread().getContextClassLoader().loadClass(className);
This loads class successfully if I give "AllPermision" in my java.policy. But in real project I cann't do this. If I give only the http port in the java.policy file, it doesn't work . It gives socket permission denied exception.
I appreciate if somebody can give some input on this.
Thanks
Surendra

try to sign applets
please check documents
or search in the forums
http://java.sun.com/security/signExample12/
http://java.sun.com/j2se/1.4/docs/guide/plugin/developer_guide/rsa_signing.html
renjith.

Java Applets and .java.policy

Hi.
We are developing an applet that need to access to the file systems and anothers properties, like user.home. To do this and don't modify the java.policy of the jre, we create a .java.policy file into user home. The content is:
grant {
permission java.util.PropertyPermission "user.name", "read";
permission java.util.PropertyPermission "user.home", "read, write";
permission java.util.PropertyPermission "java.library.path", "read, write";
permission java.lang.RuntimePermission "accessClassInPackage.org.mozilla.jss.*";
permission java.io.FilePermission "${user.home}/", "read";
permission java.io.FilePermission "${user.home}/-", "read, write";
With this configuration it works fine in Linux with Iceweasel, but in windows it's not work (firefox nor internet explorer)!.
The error is:
[SignApplet]: M�dulo iniciado.
[SignApplet]: Cliente de firma iniciado.
[ESignatureFormatFactory]: Buscando formato 'CMS'... encontrado!
[SignManager]: Firmando digitalmente...
java.lang.NullPointerException
     at java.util.Properties$LineReader.readLine(Unknown Source)
     at java.util.Properties.load(Unknown Source)
     at com.telventi.afirma.cliente.utilidades.MimeTypeHelper.<init>(MimeTypeHelper.java:23)
     at com.telventi.afirma.cliente.utilidades.MimeTypeHelper.getInstance(MimeTypeHelper.java:32)
     at com.telventi.afirma.cliente.actions.ACommonAction.<clinit>(ACommonAction.java:59)
     at com.telventi.afirma.cliente.signatureformat.signaturemanager.ASignManager.warn(ASignManager.java:405)
     at com.telventi.afirma.cliente.signatureformat.signaturemanager.SignManagerMSIEWin32.signDigitally(SignManagerMSIEWin32.java:63)
     at com.telventi.afirma.cliente.signatureformat.CMSSignatureFormat.createSignedInfo(CMSSignatureFormat.java:1562)
     at com.telventi.afirma.cliente.signatureformat.CMSSignatureFormat.signExplicitHash(CMSSignatureFormat.java:265)
     at com.telventi.afirma.cliente.signatureformat.signaturemanager.ASignManager.signHashElectronically(ASignManager.java:139)
     at com.tsol.afirma5.util.impl.AppletServiceImpl.generarFirma(AppletServiceImpl.java:60)
     at com.tsol.validacionCertificado.applet.TSolApplet.obtenerFirmaGenerada(TSolApplet.java:105)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at sun.plugin.javascript.invoke.JSInvoke.invoke(Unknown Source)
     at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)
     at sun.plugin.com.MethodDispatcher.invoke(Unknown Source)
     at sun.plugin.com.DispatchImpl.invokeImpl(Unknown Source)
     at sun.plugin.com.DispatchImpl$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.plugin.com.DispatchImpl.invoke(Unknown Source)
java.lang.ExceptionInInitializerError
     at com.telventi.afirma.cliente.signatureformat.signaturemanager.ASignManager.warn(ASignManager.java:405)
     at com.telventi.afirma.cliente.signatureformat.signaturemanager.SignManagerMSIEWin32.signDigitally(SignManagerMSIEWin32.java:63)
     at com.telventi.afirma.cliente.signatureformat.CMSSignatureFormat.createSignedInfo(CMSSignatureFormat.java:1562)
     at com.telventi.afirma.cliente.signatureformat.CMSSignatureFormat.signExplicitHash(CMSSignatureFormat.java:265)
     at com.telventi.afirma.cliente.signatureformat.signaturemanager.ASignManager.signHashElectronically(ASignManager.java:139)
     at com.tsol.afirma5.util.impl.AppletServiceImpl.generarFirma(AppletServiceImpl.java:60)
     at com.tsol.validacionCertificado.applet.TSolApplet.obtenerFirmaGenerada(TSolApplet.java:105)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at sun.plugin.javascript.invoke.JSInvoke.invoke(Unknown Source)
     at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
     at java.lang.reflect.Method.invoke(Unknown Source)
     at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)
     at sun.plugin.com.MethodDispatcher.invoke(Unknown Source)
     at sun.plugin.com.DispatchImpl.invokeImpl(Unknown Source)
     at sun.plugin.com.DispatchImpl$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.plugin.com.DispatchImpl.invoke(Unknown Source)
Caused by: com.telventi.afirma.cliente.exceptions.ClienteFirmaRuntimeException: Error al mapear el archivo de tipos.
     at com.telventi.afirma.cliente.utilidades.MimeTypeHelper.<init>(MimeTypeHelper.java:26)
     at com.telventi.afirma.cliente.utilidades.MimeTypeHelper.getInstance(MimeTypeHelper.java:32)
     at com.telventi.afirma.cliente.actions.ACommonAction.<clinit>(ACommonAction.java:59)
     ... 21 more
Caused by: java.lang.NullPointerException
     at java.util.Properties$LineReader.readLine(Unknown Source)
     at java.util.Properties.load(Unknown Source)
     at com.telventi.afirma.cliente.utilidades.MimeTypeHelper.<init>(MimeTypeHelper.java:23)
     ... 23 more
java.lang.Exception: java.lang.ExceptionInInitializerError
     at sun.plugin.com.DispatchImpl.invokeImpl(Unknown Source)
     at sun.plugin.com.DispatchImpl$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     at sun.plugin.com.DispatchImpl.invoke(Unknown Source)
[SignApplet]: Invocando isInitialized.
Code where it fail is:
TYPES.load((com.telventi.afirma.cliente.utilidades.MimeTypeHelper.class).getResourceAsStream("mimetypes.properties"));
TYPES is Properties object.
When we modify the .java.policy file with permission java.security.AllPermission it work fine too, and this make to us think that this is a permission problem!.
Somebody has an idea???
Sorry for my english!

Having to modify the policy file defeats the whole point of using applets in the first place. If you have to install anything (such as a new policy file) on the client machine, you may as well install a GUI program.
Either get yourself a digital certificate and sign the applet, or use an independent program instead.

Explicitly installin java.policy problem

is there any one who knows how to explicitly install the java.policy. What i have been doing is set the policy of the RMI server through a file like java.policy which contains this
grant {
permission java.security.AllPermission
"*:1024-65535","connect,accept,resolve";
and run the server through a batch file where the java.policy file is loaded through the system. is there anyone who knows to load the policy in the server code itself, that is, installing it explicitly?
thanks..

Yes, this is true ...but there is a saying about hardcode ...it makes things hard to code. Hardcoding the policy file eliminates flexibility for your clients and makes things harder to deploy. It certainly breaks from the standard. I just wouldn't want the poster to think one way is just as good as the other. But you do have a choice, this is true.

Java.policy codebase ignored

I've recently been trying to allow an applet on a local webpage to write to a file in the same folder. I've been using the following .java.policy file:
grant codeBase "file:${user.home}/My Documents/folder/*" {
permission java.io.FilePermission "${user.home}${/}My Documents${/}folder${/}*", "read,write";
};The HTML is in the folder called "folder" as above. So is the JAR file for the applet. In the HTML is:
<applet code="foo.class" archive="foo.jar"></applet>The applet implements a "load" function and a "save" function, which are called like:
data=document.applets[0].load(filename);
document.applets[0].save(filename,data);Everything works perfectly using Opera, but fails in IE and Firefox unless I remove the codebase from the grant, leaving just a universal "grant {".
I'm using 1.5.0_06. I've tried other codeBase values such as "file:C:/-", "file:///C:/-", "file:C:/Documents%20and%20Settings/-", and similar variations (too many to list). I've also tried adding a codebase attribute to the applet tag with the value "file:///C:/Documents%20and%20Settings/username/My%20Documents/folder/" (value derived from document.location).
Is there some way to limit granting of permissions to applets in a particular folder that works in all browsers? I know Opera bypasses the Java plugin to access the runtime directly, hence my feeling this is a plugin bug.
Thanks in advance for any help.

Use doprivileged for signed code called by javascript
Signing applets:
http://forum.java.sun.com/thread.jsp?forum=63&thread=524815
second post and last post for the java class file using doprivileged
Still problems?
A Full trace might help us out:
http://forum.java.sun.com/thread.jspa?threadID=656028

Please Help java.policy signedBy can't access file local

i create keystore and signjar in web applet
run tomcat access file in local but not acess file denied
i goto edit file java.policy
grant {
     permission java.security.AllPermission;
can access file
but put SignedBy cannot access file
grant SignedBy fuangchai{
     permission java.security.AllPermission;
Please help me example file keystore,applet.jar,java.policy
to signedby access file local in webapplet
env JDE 1.5 ,javascript yui 2.8 ,prototype js,tomcat6
File html
<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
codebase="http://java.sun.com/update/1.5.0/jinstall-1_5-windows-i586.cab#Version=5,0,0,5"
width="1" height="1" >
<param name=code value="com.arg.aes.test.FileDirectoryBS.class" >
<param name=archive value="app.jar">
<param name=codebase value="." >
<param name="type" value="application/x-java-applet;version=1.5">
<param name="scriptable" value="true">
<param name="mayscript" value="true">
<param name="debug" value="false">
<comment>
<embed name="myApplet" id="myApplet"
type="application/x-java-applet;version=1.5"
code="com.arg.aes.test.FileDirectoryBS.class"
archive="app.jar"
java_codebase="."
width="1"
height="1"
scriptable="true"
mayscript="true"
pluginspage="http://java.sun.com/products/plugin/index.html#download">
<noembed>
</noembed>
</embed>
</comment>
</object>
<applet
code="com.arg.aes.test.FileDirectoryBS"
width="1"
height="1"
archive="app.jar"
name="myApplet"
codebase="."
MAYSCRIPT="true"
>
</applet>
javascript
initlistfile : function() {
          try
               var list = $("myApplet").initlistfileInDir();
               var jsondata = list.evalJSON();
               /*alert(jsondata.dirname);
               alert(jsondata.dirpath);
               alert(jsondata.listfile.length);*/
               initTableLeft(jsondata.listfile);
          catch(e)
               alert("Exception : access denied.");
               return;
import java.applet.Applet;
import java.io.File;
import java.security.Permission;
import java.security.PermissionCollection;
import java.security.Policy;
import java.security.ProtectionDomain;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
* @author fuangchai
public class FileDirectoryBS extends Applet{
public static File[] ROOTS = File.listRoots();
public static String HOME = System.getProperty("user.home");
public String listDir()
return JsonObj.makeTopDir((ROOTS.length > 0)?ROOTS : new Object[]{HOME});
public String initlistfileInDir()
return listfileInDir(null);
public String listfileInDir(String dirName)
if(null == dirName || dirName.equals(""))
System.out.println("root = " + ROOTS.length);
try {
dirName = (ROOTS.length > 0)?ROOTS[0].getPath():HOME;
catch (Exception e) {
e.printStackTrace();
return "";
System.out.println("#########################");
DirectoryDescImp obj = makeObjDir(dirName);
return (null == obj)?null:JsonObj.makeDir(obj);
public String listlinkInDir(String dirName)
if(null == dirName || dirName.equals(""))
System.out.println("root = " + ROOTS.length);
try {
dirName = (ROOTS.length > 0)?ROOTS[0].getPath():HOME;
catch (Exception e) {
e.printStackTrace();
return "";
System.out.println("#listlinkInDir#");
try {
File obj = new File(dirName);
return (null == obj)?null:JsonObj.makelinkDir(obj.getName(),obj.getPath());
} catch (Exception e) {
System.out.println("I can't access a file here! Access Denied!");
e.printStackTrace();
return null;
public boolean isEnc(File f)
//TODO
return false;
public DirectoryDescImp makeObjDir(String dirName)
System.out.println("dirName = " + dirName);
try{
File dir = new File(dirName);
String[] entries = dir.list();
if(null == dir || null == entries || entries.length <= 0)
System.out.println("Data is null or not obj." );
return null;
System.out.println("Dir List = " + dir.list().length);
System.out.println("Dir Name = " + dir.getName());
System.out.println("Dir Path = " + dir.getPath());
DirectoryDescImp dirDesc = new DirectoryDescImp();
dirDesc.setDirName(dir.getName());
dirDesc.setDirPath(dir.getPath());
List<FileDescImp> list = new ArrayList<FileDescImp>();
for(int i=0; i < entries.length; i++) {
File f = new File(dir, entries);
FileDescImp fDesc = new FileDescImp();
fDesc.setFile(f);
fDesc.setFileEncrept(isEnc(f));
list.add(fDesc);
dirDesc.setListfile(list);
return dirDesc;
catch(Exception e){
System.out.println("I can't access a file here! Access Denied!");
e.printStackTrace();
return null;
Thank you
Fuangchai Jum
Mail [email protected]
Edited by: prositron on Jan 13, 2010 7:35 AM

OK,
Let's say I have to intialize Environment, and call method initEnvironment() in Applet's init(). Environment class:
class Environment
     private KeyStore keyStore;
     private Enumeration<String> aliases;
     public void initEnvironment() {
          Security.addProvider(new sun.security.mscapi.SunMSCAPI());
          keyStore = KeyStore.getInstance("Windows-MY");
          keyStore.load(null);
          aliases = keyStore.aliases();
}Applet is signed, I trust signer.
Since Applet is signed I'm able to overwrite existing .java.policy under user.home.
This doesn't work if I don't have .java.policy:
grant {
permission java.security.SecurityPermission "insertProvider.SunMSCAPI";
permission java.security.SecurityPermission "authProvider.SunMSCAPI";
permission java.util.PropertyPermission "jsr105Provider", "read";
permission java.util.PropertyPermission "com.sun.xml.internal.ws.api.pipe.Fiber.serialize", "read";
permission java.lang.RuntimePermission "setContextClassLoader";
permission java.util.PropertyPermission "com.sun.xml.internal.ws.api.streaming.XMLStreamWriterFactory.noPool", "read";
permission java.lang.RuntimePermission "accessDeclaredMembers";
permission java.lang.reflect.ReflectPermission "suppressAccessChecks";
permission java.lang.RuntimePermission "accessClassInPackage.com.sun.xml.internal.ws.fault";
permission java.util.PropertyPermission "com.sun.xml.internal.ws.api.streaming.XMLStreamWriterFactory.woodstox", "read";
};P.S.
Does it make sense to be able to make changes to file system and not be able to make actions from above policy?!?!

Ssl_accetp failed when java visual machine tries to load jar file

my web server uses openssl to implement https protocol .
my webpage contains a jar file.( "archive=droptext.jar")
JVM failed to load this jar from web server (using https protocol).
because Server failed to make a ssl connection after a ssl_accept failed error .(the function "SSL_accept (ssl)" failed)
if I use class file instead of jar file. JVM can successfully make a connection with server and load the class file.
I have no choice but to use jar file because the applet contains more than one class file.

>
Try putting the domain names in the Windows hosts files with their numeric addresses. That should bypass any DNS lookup. If you have central maintenance you can update all the hosts files when IP address change.
We have considered this option, but then we have the same problem described on c). IP maintentance. IPs change often and we cannot control it.
Malcolmmc, paul.miner, jschell,
I think the problem is Netbios resolution, rather than DNS one. The sites that figure on java.policy file, are not available in terms of Netbios (they are not LAN clients), so they are only visibles on DNS resolution. But Java still tries to resolve them with Netbios first, so I think there's a timeout on this resolution (not the DNS one) . This timeout causes the problem.
But, anyway .... Why is Java trying to resolve those names ??? In fact, Java will only have to match the site you are visiting with the site specified on java.policy (just a String comparison). Why does Java need to resolve (netbios & dns) the names on java.policy? I cannot figure out why.
Thank you all.
Marc

How can I change java.policy at runtim on client machines using java webst?

Hi,
I have to change java.policy to launch my application through webstart to provide one RuntimePermission "permission java.lang.RuntimePermission "getClassLoader";"
Its because of a bug in java bug "_http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4809366_"
So, my problem here is, how can I do this dynamically on each client machine's java.policy.
I have spent time on this and found some alternatives
1. Specifying an Additional Policy File at Runtime by launching application "java -Djava.security.manager -Djava.security.policy=someURL SomeApp"
Please refer more on this "http://docs.oracle.com/javase/6/docs/technotes/guides/security/PolicyFiles.html"
But, here the problem is, how can I do this using webstart (expert.jnlp) file even though I have the "java-vm-args" tag, its not supporting this argument.
Please refer "http://docs.oracle.com/javase/6/docs/technotes/guides/javaws/developersguide/syntax.html#security";
2. Implementing the Policy in code.
But, not sure how to do this..
How can I grant the runtime permission on every user's machine dynamycally?
Here are some background details on this:
I am using java6 and weblogic 10.3.3.
Here is thing that I tried,
My application downloads a few jars to the client machines using java webstart and then it will get the initial context using the t3 protocal. The jars include wlclient.jar and ojdbc6.jar initially.
The problem here I was facing, when I tried request a bean, it is giving me the following exception in the client logs.It is requesting one state less session bean and I checked the server logs as well and the bean has returned the expected values properly.
But here I observed one more thing, before this request, one session bean(state less) has been requested successfully.
java.rmi.MarshalException: CORBA MARSHAL 0 No; nested exception is:
org.omg.CORBA.MARSHAL: vmcid: 0x0 minor code: 0 completed: No
at com.sun.corba.se.impl.javax.rmi.CORBA.Util.mapSystemException(Unknown Source)
at javax.rmi.CORBA.Util.mapSystemException(Unknown Source)
at com.mbt.expert.server.util._ServerDBQueryObjectRemote_Stub.getExchangeList(Unknown Source)
at com.mbt.expert.util.DBQueryObject.getExchangeList(DBQueryObject.java:419)
at com.mbt.expert.view.dialogs.OpenExchangeDialog.actionPerformed(OpenExchangeDialog.java:425)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.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.Window.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)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$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.pumpEventsForFilter(Unknown Source)
at java.awt.Dialog$1.run(Unknown Source)
at java.awt.Dialog$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Unknown Source)
at com.mbt.expert.view.dialogs.OpenExchangeDialog.displayDialog(OpenExchangeDialog.java:606)
at com.mbt.expert.mdi.actions.OpenExchangeAction.execute(OpenExchangeAction.java:204)
at com.mbt.mdi.MDICommand.actionPerformed(MDICommand.java:47)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.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.Window.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)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$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)
Caused by: org.omg.CORBA.MARSHAL: vmcid: 0x0 minor code: 0 completed: No
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at com.sun.corba.se.impl.protocol.giopmsgheaders.MessageBase.getSystemException(Unknown Source)
at com.sun.corba.se.impl.protocol.giopmsgheaders.ReplyMessage_1_2.getSystemException(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.getSystemExceptionReply(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.processResponse(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.marshalingComplete(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.invoke(Unknown Source)
at org.omg.CORBA.portable.ObjectImpl._invoke(Unknown Source)
... 80 more
The same is working in some other machine which are in different network. So, I have replaced the wlclient.jar with the wlthint3client.jar.
After replacing this jar I was getting the below exception in client logs while requesting a state less session bean.I also checked whether the request is reaching the server (bean) or not, but its not reaching the server.The problem is same at all the machines irrespective of the networks.
java.lang.AssertionError: Failed to generate class for com.mbt.expert.server.session.LoginSessionBean_tqw6yu_HomeImpl_1033_WLStub
at weblogic.rmi.internal.StubGenerator.generateStub(StubGenerator.java:797)
at weblogic.rmi.internal.StubGenerator.generateStub(StubGenerator.java:786)
at weblogic.rmi.extensions.StubFactory.getStub(StubFactory.java:74)
at weblogic.rmi.internal.StubInfo.resolveObject(StubInfo.java:213)
at weblogic.rmi.internal.StubInfo.readResolve(StubInfo.java:207)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeReadResolve(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:197)
at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.java:598)
at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:193)
at weblogic.rmi.internal.ObjectIO.readObject(ObjectIO.java:62)
at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:240)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:348)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:259)
at weblogic.jndi.internal.ServerNamingNode_1033_WLStub.lookup(Unknown Source)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:405)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:393)
at javax.naming.InitialContext.lookup(Unknown Source)
at com.mbt.expert.mdi.ExpertVariable.getLoginSession(ExpertVariable.java:455)
at com.mbt.expert.view.dialogs.Login.okPressed(Login.java:187)
at com.mbt.expert.view.dialogs.Login.keyPressed(Login.java:141)
at java.awt.Component.processKeyEvent(Unknown Source)
at javax.swing.JComponent.processKeyEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.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.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(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.pumpEventsForFilter(Unknown Source)
at java.awt.Dialog$1.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(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)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at weblogic.rmi.internal.StubGenerator.generateStub(StubGenerator.java:795)
... 55 more
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission getClassLoader)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.ClassLoader.getSystemClassLoader(Unknown Source)
at weblogic.utils.classloaders.AugmentableClassLoaderManager.getAugmentableClassLoader(AugmentableClassLoaderManager.java:48)
at weblogic.rmi.internal.ClientRuntimeDescriptor.findLoader(ClientRuntimeDescriptor.java:254)
at weblogic.rmi.internal.ClientRuntimeDescriptor.getInterfaces(ClientRuntimeDescriptor.java:132)
at weblogic.rmi.internal.StubInfo.getInterfaces(StubInfo.java:77)
at com.mbt.expert.server.session.LoginSessionBean_tqw6yu_HomeImpl_1033_WLStub.ensureInitialized(Unknown Source)
at com.mbt.expert.server.session.LoginSessionBean_tqw6yu_HomeImpl_1033_WLStub.<init>(Unknown Source)
... 60 more
I have tried one more thing, I have taken all the required jars to one of the client machines and executed the main class (by setting the required class path) from cmd using java instead of javaws. Surprisingly, its working fine with out any problem using the wlthint3client.jar.
I also tried the same, by placing wlclient.jar using java in the same way(from cmd instead of javaws ), but I was facing the same exception while requesting the second session bean and found the same above exception in client logs.
To resolve this, I come across the java bug that I have given earlier "_http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4809366_".
In that page, I found a work around for this; suggested by bea to add the Runtime permission "permission java.lang.RuntimePermission "getClassLoader";" to the clients java.policy
So, please suggest me a way to resolve this problem.
Please suggest me if you have any other solutions for this problem.
Thanks in advance :)

I still think your problem is nothing to do with that ancient non-bug and that you should be looking elsewhere. You might be lucky and find someone here who can say "Ah, I know what that is" but I doubt it because since Oracle took over Sun this site has gone down hill big time.

How to read the Java source code (in Netbeans)

I use OS X10.5.5, NetBeans 6.1 and JSE 6 on a 64 bit mac.
When I downloaded NB6.1 it had JSE 5 as it's default (and only) java platform. I ran Software Update to get Java 6 from Apple, used the Java Prefrences utitlity to set JSE6 as default. In NB I added the JDK6 platform, registered the JDK6 javadocs and noticed that I also have the option of registering the Java source code.
I have three questions:
1) How do I make JDK6 the default in NetBeans. The JDK5 keeps being default after I did the steps above and I don't see anywhere to change that.
2) How do I read the Java 6 source code? I can see sun provides [source code| http://download.java.net/jdk6/] for their supported platforms. I dont see Apple doing the same for its JDK port. What would I need to do to get to read the java SE6 sources? or is it actually hiding somewhere in the /System/Library/Frameworks/JavaVM.framework/Versions/1.6.0/Home hierarchy?
3) Where does the JVM look for the binary code to run when I make a call to, say java.util.ArrayList or any other library. In my naivety I would have assumed it would be a .class file somewhere in the java Home folder, but I don't see anything like it.
thanks in advance,
chris

This is taken from the help included with netbeans. In response to question 1.
By default, the IDE uses the version of the Java SE platform (JDK) with which the IDE runs as the default Java platform
for compilation, execution, and debugging. You can view your IDE's JDK version by choosing Help > About and clicking the
Detail tab. The JDK version is listed in the Java field.
You can run the IDE with a different JDK version by starting the IDE with the --jdkhome jdk-home-dir switch on the command line
or in your IDE-HOME/etc/netbeans.conf file. For more information, see IDE Startup Parameters.
In the IDE, you can register multiple Java platforms and attach Javadoc and source code to each platform. For example, if you
want to work with the new features introduced in JDK 5.0, you would either run the IDE on JDK 5.0 or register JDK 5.0 as a
platform and attach the source code and Javadoc to the platform.
In , you can switch the target JDK in the Project Properties dialog box. In , you have to set the target JDK in the Ant script itself,
then specify the source/binary format in the Project Properties dialog box.
To register a new Java platform:
Choose Tools > Java Platforms from the main window.
Click New Platform and select the directory that contains the Java platform. Java platform directories are marked with a
in the file chooser.
Use the Sources and Javadoc tabs to attach Javadoc documentation and source code for debugging to the platform.
Click Close.
To set the default Java platform for a standard project:
Right-click the project's root node in the Projects window and choose Properties.
In the Project Properties dialog box, select the Libraries node in the left pane.
Choose the desired Java platform in the Java Platform combo box.
Switching the target JDK for a standard project does the following:
Offers the new target JDK's classes for code completion.
If available, displays the target JDK's source code and Javadoc documentation.
Uses the target JDK's executables (javac and java) to compile and execute your application.
Compiles your source code against the target JDK's libraries.
If you want to register additional Java platforms with the IDE, you can do so by clicking the Manage Platforms button.
Then click the Add Platform button and navigate to the desired platform.
To set the target Java platform for a free-form project:
In your Ant script, set the target JDK as desired in the javac, java, and javadoc tasks.
Right-click the project's root node in the Projects window and choose Properties.
In the Sources panel, set the level of JDK you want your application to be run on in the Source/Binary Format combo box.
When you access Javadoc or source code for JDK classes, the IDE searches the Java platforms registered in the
Java Platform Manager for a platform with a matching version number. If no matching platform is found, the IDE's default platform is used instead.
See Also
Managing the Classpath
Declaring the Classpath in a Free-Form Project
Stepping Through Your Program
Legal Notices

Java Plug in fatel Error The java Runtime Environment cannot be loaded from

Java Plug in fatel Error The java Runtime Environment cannot be loaded from <\bin\server\jvm.dll>
files are left behind when you uninstall Java from Windows XP.
Directory of C:\Documents and Settings\user1\.java
10/14/2004 06:02 PM <DIR> .
10/14/2004 06:02 PM <DIR> ..
03/07/2005 07:10 PM 32 jpicerts130_02
09/19/2004 04:37 PM 32 jpicerts141_02
09/19/2004 04:37 PM 32 jpihttpscerts141_02
03/07/2005 07:10 PM 549 properties130_02
09/19/2004 04:37 PM 383 properties141_02
5 File(s) 1,028 bytes

How do i fix it

Java.policy code delays JVM loading

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