Hello, I developed my code in NetBeans 5.51 plus Java 1.5.
By signing the JAR file under Java 1.5, I can't open the applet.
The console's message is failing reading file. But if I sign it with Java 1.6 with the same JAR file, it successes.Why?
I have to use Java 1.5 for my case.
Thanks!
My whole process is
C:\Program Files\Java\jdk1.5.0_12\bin>keytool -genkey -keystore c:\mykeystore -a
lias myself
Enter keystore password: 888888
What is your first and last name?
[Unknown]: aaaaa
What is the name of your organizational unit?
[Unknown]: aaaaa
What is the name of your organization?
[Unknown]: aaaaa
What is the name of your City or Locality?
[Unknown]: aaaaa
What is the name of your State or Province?
[Unknown]: aa
What is the two-letter country code for this unit?
[Unknown]: us
Is CN=aaaaa, OU=aaaaa, O=aaaaa, L=aaaaa, ST=aa, C=us correct?
[no]: y
Enter key password for <myself>
(RETURN if same as keystore password):
C:\Program Files\Java\jdk1.5.0_12\bin>keytool -selfcert -alias myself -keystore
c:\mykeystore
Enter keystore password: 888888
C:\Program Files\Java\jdk1.5.0_12\bin>keytool -list -keystore c:\mykeystore
Enter keystore password: 888888
Keystore type: jks
Keystore provider: SUN
Your keystore contains 1 entry
myself, Jul 27, 2007, keyEntry,
Certificate fingerprint (MD5): B3:F0:B8:D0:11:DC:E1:D3:EF:B3:3B:38:86:EC:28:77
C:\Program Files\Java\jdk1.5.0_12\bin>jarsigner -keystore c:\mykeystore c:\TestC
ell4.1.jar myself
Enter Passphrase for keystore: 888888
Warning: The signer certificate will expire within six months.
C:\Program Files\Java\jdk1.5.0_12\bin>
> The console's message is failing reading file
Don't paraphrase error messages, post full and complete copies of all of the related text.
You haven't given any useful information.
**Error: larger_plotdata.bin (The system cannot find the file specified)
java.lang.reflect.InvocationTargetException
at java.awt.EventQueue.invokeAndWait(EventQueue.java:853)
at Combox.init(Combox.java:55)
at Combox.main(Combox.java:301)
Caused by: java.lang.NullPointerException
at javax.swing.DefaultComboBoxModel.<init>(DefaultComboBoxModel.java:53)
at javax.swing.JComboBox.<init>(JComboBox.java:177)
at Combox.initComponents(Combox.java:94)
at Combox.access$000(Combox.java:28)
at Combox$1.run(Combox.java:57)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
The first line is telling you that a file is missing or mislocated or it's location is not correctly specified:
**Error: larger_plotdata.bin (The system cannot find the file specified)
well, it's strange.
It is ok for Java 1.6.
I just right click the project code,it automately create the JAR file.
NetBeans has such a function.
> well, it's strange.
> It is ok for Java 1.6.
> I just right click the project code,it automately
> create the JAR file.
> NetBeans has such a function.
But you don't get that message when you're creating the jar file. You get it when you're running something. So you need to examine your code and find out where it's trying to read that file, and then find out what assumptions your code is making.
Generally my advice to people who are writing signed applets to access files on the client's system is this: if you can't debug basic problems like the one you're having, you shouldn't be writing signed applets just yet. Step back and write some basic Java applications and learn the ropes before you start on advanced techniques.
one more question.
Do I need to do both things which is to modify a policy file and sign an applet or just either way?
Thanks
> one more question.
> Do I need to do both things which is to modify a
> policy file and sign an applet or just either way?
>
> Thanks
If you sign an applet, it can work on any client computer if the operatoe accepts the applet's certificate.
If you place an appropriately configured policy file on a computer, it allows an applet to execute on that computer only.
