Windows temporary file in Java

Question

How to create a file in Windows that would have attributes FILE_ATTRIBUTE_TEMPORARY and FILE_FLAG_DELETE_ON_CLOSE set using Java?

I do want my file to be just in-memory file.

To precise: delete-on-exit mechanism does not satisfy me, because I want to avoid situation, when some data is left on disk in case of, for example, application crash.

Answer 1

Use something like this. It won't be in-memory though, but a temporary file that is deleted when the app exits.

try { 
   // Create temp file. 
   File temp = File.createTempFile("pattern", ".suffix"); 

   // Delete temp file when program exits.
   temp.deleteOnExit();

   // Write to temp file
   BufferedWriter out = new BufferedWriter(new FileWriter(temp));    
   out.write("aString");     
   out.close();
} catch (IOException e) { 
// (..)
} 

Answer 2

Why not just use a memory block i.e. datastructure ? What's the incentive behind creating a file ? If you want a scratch file then temp file and delete on exit will help.