Hi prof hwang,

did u notice that only one applet loads correctly on this forum page.

the second applet failed to load.

i noticed this happened also in other 2 applet pages
the error message is
Java Plug-in 1.6.0_17
Using JRE version 1.6.0_17-b04 Java HotSpot(TM) Client VM
User home directory = C:\Users\160
----------------------------------------------------
c:   clear console window
f:   finalize objects on finalization queue
g:   garbage collect
h:   display this help message
l:   dump classloader list
m:   print memory usage
o:   trigger logging
q:   hide console
r:   reload policy configuration
s:   dump system and deployment properties
t:   dump thread list
v:   dump thread stack
x:   clear classloader cache
0-5: set trace level to
----------------------------------------------------


Reading certificates from 11 http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/14019/ejs_MagneticField2Wire.jar | C:\Users\160\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\20\f64d854-45cedbce.idx
Reading certificates from 11 http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/2/ejs_twowiresBfield.jar | C:\Users\160\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\35\252779a3-55ac904d.idx
load: class users.sgeducation.lookang.MagneticField2Wire_pkg.MagneticField2WireApplet.class not found.
java.lang.ClassNotFoundException: users.sgeducation.lookang.MagneticField2Wire_pkg.MagneticField2WireApplet.class
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed:http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/14019/users/sgeducation/lookang/MagneticField2Wire_pkg/MagneticField2WireApplet/class.class
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 7 more
Exception: java.lang.ClassNotFoundException: users.sgeducation.lookang.MagneticField2Wire_pkg.MagneticField2WireApplet.class
load: class users.sgeducation.lookang.MagneticField2Wire_pkg.MagneticField2WireApplet.class not found.
java.lang.ClassNotFoundException: users.sgeducation.lookang.MagneticField2Wire_pkg.MagneticField2WireApplet.class
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed:http://www.phy.ntnu.edu.tw/ntnujava/ejsuser/14019/users/sgeducation/lookang/MagneticField2Wire_pkg/MagneticField2WireApplet/class.class
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 7 more
Exception: java.lang.ClassNotFoundException: users.sgeducation.lookang.MagneticField2Wire_pkg.MagneticField2WireApplet.class