Function: deletefile

CALL:

rc = deletefile(filename)

DESCRIPTION:

Delete file using java method.

INPUT:

filename string 
name of file to delete

OUTPUT:

rc boolean 
returncode.
true: file has been deleted
false: file could not be deleted

APPROACH: 

  Implemented after the following report of Yair Altman:
  
  Memory leak
  
  The memory leak in delete was (to the best of my knowledge) originally
  reported in the CSSM newsgroup a few weeks ago. The reported mentioned
  that after deleting 760K files using delete, he got a Java Heap Space
  out-of-memory error. The reported solution was to use the Java
  equivalent, java.io.File(filename).delete(), which does not leak
  anything.      
  
  I was able to recreate the report on my WinXP R2012a system, and
  discovered what appears to be a memory leak of ~150 bytes per file. This
  appears to be a very small number, but multiply by 760K (=111MB) and you
  can understand the problem. Of course, you can always increase the size
  of the Java heap used by Matlab (here's how), but this should only be
  used as a last resort and certainly not when the solution is so simple.
  % 
  For those interested, here?s the short test harness that I?ve used to
  test the memory leak: