Problem with download extension.

Question

Hi,
I've tried to run the java tutorial download extension's example but without success.
I've compiled the two java files and put the class files into their respective jar file.
- The two jar files are in the same directory (AreaApplet.jar and RectangleArea.jar).
- The AreaApplet.jar's manifest is :
Manifest-Version: 1.0
Created-By: 1.3.1_01 (Sun Microsystems Inc.)
Class-Path: RectangleArea.jar
- The RectangleArea.jar's manifest is :
Manifest-Version: 1.0
Created-By: 1.3.1_01 (Sun Microsystems Inc.)
- The applet tag in the html file is :
<APPLET NAME=test
     CODE=AreaApplet.class
     ARCHIVE=AreaApplet.jar
     WIDTH=100 HEIGHT=100>
</APPLET>
All seems to be good but I have a ClassNotFoundException with the RectangleArea class.
Please, does anyone see what's wrong ?

Answer 1

Hi,
I can give you the steps I follow.
In an empty directory (all the files are in the same) :
- I put the two classes in the files : RectangleArea.java and AreaApplet.java
- I compile the two classes with this command line :
c:\jdk1.3.1_01\bin\javac AreaApplet.java RectangleArea.java
- I make the jar files with these command lines :
c:\jdk1.3.1_01\bin\jar cf RectangleArea.jar RectangleArea.class
c:\jdk1.3.1_01\bin\jar cmf manifest.txt AreaApplet.jar AreaApplet.class
manifext.txt :
Class-Path: RectangleArea.jar <Enter>
- I make a basic html file with this applet tag :
<applet name=test code=AreaApplet.class archive=AreaApplet.jar width=200 height=100>
</applet>
- I delete these files : RectangleArea.class and AreaApplet.class
- I run my html file and I have : ClassNotFoundException : RectangleArea
But it runs correctly with the applet viewer :
c:\jdk1.3.1_01\bin\java -verbose sun.applet.AppletViewer test.html
Is it possible that a wrong system CLASSPATH can cause this error ?
Thank you for your help.