[ImageJ-devel] @Parameter fields - don't make them final

[Grant B. Harris]

I discovered the hard way - don't declare @Parameter fields final.

In the GradientImage plugin, the width and height are declared thus:
     @Parameter(min = "1")
     private final int width = 512;

     @Parameter(min = "1")
     private final int height = 512;

The input dialog gives you two spinners to change these values.  It even 
remembers the last values input.  But then the plugin uses the initial 
final values set when declared... which makes sense.  But the input 
dialog does not recognize, and there are not warnings that the inputs 
will be ignored.

So, if you really want the user to be able to change a parameter, best 
to not final !

-- Grant