Getting ClassNotFoundException in Applet by using JDK1.6_20

Question

In my web application, we are using an applet which gets invoked from the jsp.
Its working fine with jdk1.5 and 1.4 but when I am executing it on machine having JDK1.6_20 its throwing ClassNotFoundException. (Please see the log below)
I cleared the cache and history but still getting this issue.
I tried by switching off to Next Generation Java Plugin but still its not working.
load: class com.idautomation.linear.BCApplet not found.
java.lang.ClassNotFoundException: com.idautomation.linear.BCApplet
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Please provide the solution of it.

Answer 1

am_mehra wrote:
Hi,
In my jsp, we have used the following lines to show an apple.
<applet name="myApplet" width="390" height="105" align="Baseline">
<param name="code" value="com.idautomation.linear.BCApplet">
<param name="archive" value="LinearBarCode.jar">
<param name="name" value="BarCodeApplet">
<param name = "BARCODE" value = "<%= boOrderReturn.getString("return_no")%>">
<param name = "CODE_TYPE" value = "CODE128">
<param name = "BAR_HEIGHT" value = "2">
<param name = "LEFT_MARGIN" value = "0">
<param name = "TEXT_FONT" value = "ARIAL|BOLD|11">
<param name="scriptable" value="true">
</applet>Looking at this in code tags, which makes things more clear, suggests various problems to me..
<applet name="myApplet" width="390" height="105" align="Baseline">
<param name="code" value="com.idautomation.linear.BCApplet">
<param name="archive" value="LinearBarCode.jar">
<param name="name" value="BarCodeApplet">
<param name = "BARCODE" value = "<%= boOrderReturn.getString("return_no")%>">
<param name = "CODE_TYPE" value = "CODE128">
<param name = "BAR_HEIGHT" value = "2">
<param name = "LEFT_MARGIN" value = "0">
<param name = "TEXT_FONT" value = "ARIAL|BOLD|11">
<param name="scriptable" value="true">
</applet>1) [Values for align|http://www.w3.org/TR/REC-html40/struct/objects.html#adef-align-IMG] can be bottom|middle|top|left|right. Note that none of those is 'Baseline'. You cannot just 'make up' HTML and expect it to work.
2) The code and archive attributes should be in the applet opening element, not specified as params.
3) Does that applet truly accept a 'name' param?
4) The barcode param value looks suspiciously like it it is malformed.
Fixing those things (barring point 4, but also removing the redundant spaces in the param elements) might result in something like..
<applet
     name="myApplet"
     code="com.idautomation.linear.BCApplet"
     archive="LinearBarCode.jar"
     width="390"
     height="105"
     align="bottom">
<param name="name" value="BarCodeApplet">
<param name="BARCODE" value='<%= boOrderReturn.getString("return_no")%>'>
<param name="CODE_TYPE" value="CODE128">
<param name="BAR_HEIGHT" value="2">
<param name="LEFT_MARGIN" value="0">
<param name="TEXT_FONT" value="ARIAL|BOLD|11">
<param name="scriptable" value="true">
</applet>
The above code is working in JDK1.4 and 1.5 but throwing classnotfoundexception.Did you mean ClasNotFoundException? If so, then please use the correct capitals, so there is no confusion. This is even more important on an international technical forum.
I am not clear with the response "Change line 114, column 28 of the source from a '.' to a ','. All the problems should be gone." , kindly explain where I need to change this.That was commonly known as sarcasm. It meant I cannot fix code that I cannot see. That is why I requested you post the SSCCE (please read the link).
It's an internal application not publicly available.OK - understood.