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What is a better option (in terms of performance): copying a file using fileinputstream and fileoutputstream or running a OS specific command copy command from Java?
I’m quite sure using the OS specific copy command would be faster or at least as fast as a simple self-written solution. The OS specific command probably uses a sensible buffer size and other optimizations which you would otherwise have to figure out yourself.
Edit:
x-x is right, you should not call the copy command directly. I thought Java already had a copy method, like File.copy() or something, but I couldn’t find anything, not even in JDIC. So Apache Commons IO is probably the way to go.