Simple test case:

public class AccessDenied {
  public static void main(String[] args) {
    try {
      java.io.File file = new java.io.File("hugo");
      boolean result = file.createNewFile();
      System.out.println(result);
    } catch (java.io.IOException ex) {
      System.out.println("Error: " + ex.getMessage());
    }
  }
}

When I run this on either Solaris or Windows and "hugo" does
not exist, I get the expected output "true".

When "hugo" exists and is a file, I get the expected output
"false" on either platform.

When "hugo" exists and is a directory, I get "false" on
Solaris and an "Access is Denied" exception is thrown
on Windows. 

This is a problem for SAP since their application depends on the
correct behaviour, i. e. the access denied exception as unexpected
behaviour is not acceptable since it introduces a platform 
dependency.