Is it good to have multiple class definitions in a single file?

Question

Is it good to have multiple class definitions in a single file? or is it preferable to have one class for each file?

Answer 1

I prefer one class for each file. You do not have to search for the correct file name because it is always a class name.

Answer 2

One class for each file.

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Answer 3

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Answer 4

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Answer 5

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Answer 6

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Answer 7

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Answer 8

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Answer 9

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Answer 10

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Answer 11

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Answer 12

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Answer 13

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Answer 14

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Answer 15

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Answer 16

As long as I don't break the 1000 line barrier, I will use as many related classes as possible.

Sometimes an abstraction can be only one overridden method.