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JFrame design question

 
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Folks,

I'm creating a Java App using swing and had a quick question. Does it make more sense when creating a frame to extend the JFrame class or to create a new JFrame object in the constructor of the class that will provide the gui? I don't need to extend any other classed by this gui class so I'm not worried about that but rather what makes sense from a strictly OOP design viewpoint? By extending the JFrame class I should be creating a more specific JFrame class. However, I'm not really adding any functionality (technically), I'm just painting some objects. Thanks for your input.

Andreas
 
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I think you just answered your own question - you're not adding any functionality, so why would you extend it?
 
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