Re: [Jython-users] help with jython and creating an applet

[Robert W. B. <rb...@di...>]

Hello Scott,

Your file is "dlClient.py" and your class is "downloadClient."  Try it
with matching filename and classname instead.  A jythonc-compiled module
must meet special restrictions to play nice in a Java
framework, even though these restrictions don't apply to Jython- as
you have already seen. Matching filename-classname is one of them.


On Fri, 31 Aug 2001, Scott Hathaway wrote:
> I am trying to create a jython applet.  I am running Windows 2000 pro
> with Sun's JDK 1.3.1 and I have tried both Jython 2.0 and 2.1a3.  My
> code runs fine when I execute it with Jython, but when comiling it into
> the applet with (I have only one .py file named dlClient.py):
>
> jython --compiler javac --all --jar downloadClient.jar *.py
>
> The .jar is created, but it gives a warning about using a deprecated API.  Then when I try to execute it with the appletviewer, I get an error that says:
>
> java.lang.ClassCastException:  dlClient
>
> Can anyone tell me what I am doing wrong?  Below, I have posted the code for the .py file as well.
>
> from java import applet
> from java.awt import Color,Label,Button,GridLayout,Label
> from urllib import urlretrieve
> import time
>
> class downloadClient(applet.Applet):
>     def init(self):
>  try:
>   self.setLayout(GridLayout(0,1))
>   self.title = self.add(Label('Download Test', Label.CENTER))
>   self.title.setBackground(Color.blue)
>   self.title.setForeground(Color.white)
>   self.add(Label('Beginning Download ...'))
>   # this file is 45.7k in size
>   self.startTime = time.time()
>   rValue = urlretrieve("http://localhost/reports/detail.pdf")
>   rValue = urlretrieve("http://localhost/reports/detail.pdf")
>   rValue = urlretrieve("http://localhost/reports/detail.pdf")
>   self.endTime = time.time()
>   self.elapsedTime = int(self.endTime - self.startTime)
>   self.kPerSec = int(137.1/self.elapsedTime)
>   self.add(Label('Download Complete'))
>   self.add(Label('Amount Downloaded:  137.1 KB'))
>   self.add(Label('Time Elapsed:  ' + str(self.elapsedTime) + ' seconds'))
>   self.totalSpeed = self.add(Label('Total Speed:  ' + str(self.kPerSec) + ' KB/Sec'))
>   self.totalSpeed.setBackground(Color.yellow)
>   #self.totalSpeed.setForeground(Color.blue)
>  except:
>   pass
>
> if __name__ == '__main__':
>     import pawt
>     pawt.test(downloadClient())
>