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How to update randomaccessfile  RSS feed

 
Don Wettasinghe
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I'm studying Java,

I wrote a Address book for practice.
Actually I follow a sample and finally finish. It work fine. It has Add new, Move Next, Move Last, Move First, Clear Buttons. I need to add UPDATE Button. I already Add that button. How can I do the coding?

I don't know how to play with " seek(position)"

Can anybody give some Example code please?


 
Campbell Ritchie
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You ought to separate the logic ("M" for Model) from the class which displays the GUI ("V" for view). I would suggest you have a File object which contains data corresponding to Address objects. Then you can find an Address object, and a way to write it into the file. You would need to find a particular Address object before trying to update it.

Move the clear instructions out of the clear button actionPerformed method into a clearDisplay() method and call clearDisplay() from the actionPerformed method.
 
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