It doesn't take much Java development experience to learn firsthand what the NullPointerException is about. In fact, one person has highlighted dealing with this as the number one mistake Java ...

Hi, I sometimes encounter a NullPointerException using the SmbFile.exists method in version 2.1.2 I can have two different stack traces : java.lang.NullPointerException at jcifs.smb.SmbSessionImpl.

"A java.lang.NullPointerException has occurred. If you are running the latest version of NetBeans you can report this, including a copy of your messages.log file as an attachment.

Java is not a particularly beginner-friendly language and it is rife with rigid rules and structures that can be tough to wrap your head around. Then there’s the NullPointerException.