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Applets in Symmantec Cafe and Navigator

Posted on 1998-01-07
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Last Modified: 2012-05-04
I am a beginner. I am at present using Symmentac's Visual Cafe for Java, Prof. dev. ed. 2.0.
When I try to run a simple applet (or run the example applet accompanying The Cafe) in Netscape Navigator Gold 3.01, I get the same error message:
APPLET CAN'T START: CLASS BUTTONTESTAPPLET GOT A SECURITY VIOLATION: METHOD VERIFICATION ERROR.
I have heard that Netscape Navigator doesn't support the latest Java versions. What can I do to instruct the Java compiler to create code which my browser can understand?
Any other suggestions would be welcome...
I should add that the applet works fine in the Symmantec Cafe's workspace.
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Question by:boomerang061797
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7 Comments
 

Author Comment

by:boomerang061797
ID: 1232009
Edited text of question
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Expert Comment

by:jhance
ID: 1232010
Be sure you set up to generate code for JDK 1.01 and not JDK 1.1.  Navigator 3.01 only support JDK 1.01.  I'd suspect that it in some sort of properties or compile options menu.
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Expert Comment

by:msmolyak
ID: 1232011
It's JDK 1.0.2 to be exact.
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Accepted Solution

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jhance earned 70 total points
ID: 1232012
In that case your applet is doing something that violates the security model in Navigator.  When running in the Cafe appletviewer, the applet can do anything.  Inside Navigator, the "Java Sandbox" is in effect and you are trying to do something illegal.
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Author Comment

by:boomerang061797
ID: 1232013
I'm having trouble finding exactly how to change the compiler options to generate 1.0.1/1.0.2 code. There is little information in the online help files. Any suggestions?
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Expert Comment

by:msmolyak
ID: 1232014
I am afraid VC 2.0 does not support JDK 1.0.x code. You can either use Symantec Cafe 1.8 which allows you to switch between JDK 1.1.x and 1.0.x (you have to do it outside of the environment though by running a batch file which moves files around). Or you can use JDK 1.0.2 to do the compiling.  You might have a problem however compiling code created in VC 2.0 since that environment is targeted for JDK 1.1. (For example when you visually represent component interacion the code that's generated is JDK 1.1 specific).
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Expert Comment

by:msmolyak
ID: 1232015
The better option is of course to get the lates version of Navigator (4.0.4) and forget about JDK 1.0.
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