Can you create a File object in Java without saving to hard disk?
All the constructors for java.io.File seem to take info about a location on disk.
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5What do you want to do with the file? Do you actually want a stream?Dave Newton– Dave Newton2013-10-16 20:28:07 +00:00Commented Oct 16, 2013 at 20:28
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Yeah I guess I just need a stream. But my main goal is persist the file object in a DB4O database as well as on disk, as a .groovy file.Alexander Mills– Alexander Mills2013-10-17 00:48:51 +00:00Commented Oct 17, 2013 at 0:48
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So... You do want to save it to the disk. Why can't you just create a string and write it to the dB and the file? I'm confused regarding the actual issue.Dave Newton– Dave Newton2013-10-17 00:57:43 +00:00Commented Oct 17, 2013 at 0:57
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2 Answers
A File object is not a file. It is a path to a location on disk with some utility methods. This location need not exist to have a valid file. For instance, you can do File#createNewFile to create a physical file after creating a File object that would point to that pathname on disk.
Use URL and related classes to read remotely, or some sort of java.nio.ByteBuffer to store file data in memory.
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Even if you create a file object, the file itself does not need to exist on disk.
When constructing the java object, you need to specify a location of the file absolute or relative to the current directory, but the file itself does not need to exist on disk.
