What is a NullPointerException, and how do I fix it?
up vote 210 down vote favorite 662 What are Null Pointer Exceptions ( java.lang.NullPointerException ) and what causes them? What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely? java nullpointerexception share edited May 26 '16 at 16:15 community wiki Ziggy locked by Robert Harvey ♦ Aug 26 '14 at 23:04 This question's answers are a collaborative effort: if you see something that can be improved, just edit the answer to improve it! No additional answers can be added here comments disabled on deleted / locked posts / reviews | up vote 210 down vote favorite 662 What are Null Pointer Exceptions ( java.lang.NullPointerException ) and what causes them? What methods/tools can be used to determine the cause so that you stop the exception from causing the program to terminate prematurely? java nullpointerexceptio...