Unzip issue: Could not delete the zip file after unzip it

Question

I have issue with the following code, the purpose is to unzip first then delete the zip file. But I could not delete the zip file. When I put a break point before my delete() call, I manually delete it and get the file is used by another process. Please help. Here is my code;
try{
File primeZip = new File(dir, fileName);
ZipInputStream zipStream = new ZipInputStream(new FileInputStream(primeZip));
     ZipFile zf = new ZipFile(primeZip);
     OutputStream out = null;
     for (Enumeration em = zf.entries(); em.hasMoreElements();){
          String fileName = em.nextElement().toString();
          out = new FileOutputStream(fileName );
          byte[] buf = new byte[16384];
          int len;
          while ((len = zipStream.read(buf)) > 0) {
               out.write(buf, 0, len);
          out.flush();
          out.close();
     out.flush();
               out.close();
               zipStream.close();
primeZip.delete();
}catch(FileNotFoundException e){          
}catch(IOException e){         
}

Answer 1

I put close() for ZipFile object which is zf.close() befoer I delete the zip file resolve this issue.
Thanks.