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https://issues.apache.org/jira/browse/BCEL-196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Thomas resolved BCEL-196.
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    Resolution: Won't Fix

Each opcode has a dedicated sub-class. Changing the opCode would require 
changing the sub-class.

I think I would have written this differently and tried to make opCode final. A 
quick look at the code suggests that this would be possible. I could refactor 
the code that way but I think there are more useful things I could be doing 
than implementing a refactoring that is more about style than it is substance.

> why is Instruction.setOpcode private?
> -------------------------------------
>
>                 Key: BCEL-196
>                 URL: https://issues.apache.org/jira/browse/BCEL-196
>             Project: Commons BCEL
>          Issue Type: Bug
>            Reporter: Mark Roberts
>         Attachments: instruction.diff
>
>
> Am I missing another way to modify an instruction opcode?  Deleting and 
> recreating does not appear to be a good alternative due to having to deal 
> with target pointers. 



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