Re: [Jython-users] Applet problem, should be simple...

[Wayne P. <wa...@mi...>]

rbill wrote:
> On Sun, 17 Feb 2002, Wayne Pierce wrote:
> 
>>I haven't worked with Jython in a while, so I thought I'd build a simple 
>>Applet to refresh my memory.  I copied the code from the web site below:
>>
>>from java.applet import Applet
>>
>>class HelloWorld(Applet):
>>     def paint(self, g):
>>         g.drawString("Hello from Jython!", 20, 30)
>>
>>I then used jythonc to create a .jar file and have the following in my HTML:
>>
>>   <applet code='HelloWorld' archive='hello.jar' width=200 height=200>
>>   <applet>

I found one problem, the file I created was 'hello.py' but the class was 
'HelloWorld'.  When I changed them to match the error I was getting 
before went away...and I got a new one. :-(


> Does the browser you are using have plugin support for JDK 1.4?  Without 
> plugins, use jdk 1.1.8 to compile applets.  If this is no help, forward 
> the options given to jythonc and the java console output.

I didn't load the applet plugin, but this time I did test it with 
appletviewer.exe and got the following output:

java.lang.NoClassDefFoundError: org/python/core/PyProxy
         at java.lang.ClassLoader.defineClass0(Native Method)
         at java.lang.ClassLoader.defineClass(ClassLoader.java:512)
         at 
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:12
6)
         at java.net.URLClassLoader.defineClass(URLClassLoader.java:249)
         at java.net.URLClassLoader.access$100(URLClassLoader.java:57)
         at java.net.URLClassLoader$1.run(URLClassLoader.java:196)
         at java.security.AccessController.doPrivileged(Native Method)
         at java.net.URLClassLoader.findClass(URLClassLoader.java:189)
         at 
sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:134)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:309)
         at 
sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:114)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:265)
         at 
sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:470)
         at sun.applet.AppletPanel.createApplet(AppletPanel.java:551)
         at sun.applet.AppletPanel.runLoader(AppletPanel.java:480)
         at sun.applet.AppletPanel.run(AppletPanel.java:293)
         at java.lang.Thread.run(Thread.java:539)


When I compiled with 'jythonc -jar hello.jar hello.py' I got the 
following output:

Warning: -jar is deprecated, use --jar
processing hello

Required packages:
   java.applet

Creating adapters:

Creating .java files:
   hello module
     hello extends java.applet.Applet

Compiling .java to .class...
Compiling with args: ['c:\\jdk\\bin\\javac', '-classpath', 
'C:\\jython\\jython.j
ar;;.\\jpywork;;C:\\jython\\Tools\\jythonc;C:\\Xitami\\webpages\\.;C:\\jython\\L
ib;C:\\jython', '.\\jpywork\\hello.java']
0  Note: .\jpywork\hello.java uses or overrides a deprecated API.
Note: Recompile with -deprecation for details.

Building archive: hello.jar
Tracking java dependencies:

I've tried moving the HTML file and the .jar into the jpywork directory 
with no luck.

I'm not sure what to try next, I even tried another program from 
Jython_for_Java_Programmers.  That program worked fine when typed 
interactively but didn't work when I tried to make a .jar and run it.

Thanks for any help,

Wayne