Learn what causes null pointer exceptions in Java, how to identify them, and how to fix them with simple techniques and best practices. Also, learn how to test and learn more about them.

ERROR: NullPointerException encountered while trying to adding String to Deque that is set to null. java.lang.NullPointerException INFO: Successful at adding String to Deque that is set to null ...

When computing facets, it is possible that the following exception gets thrown: java.lang.NullPointerException: Cannot invoke "com.google.refine.model.Column.getPrecompute(String)" because "column" ...

If no null pointers would be dereferenced, the transformed program behaves just as the original.We applied our transformation in experiments involving multiple benchmarks, the Java Standard Library, ...

Current Behavior While trying to publish text message, i'm getting the NULL pointer exception. Pasting the Logs: java.lang.NullPointerException: java.lang ...

Kind of weird question -- what is effect on the sever of having to handle a NPE? Does it "hurt" the server in terms of resources, memory, etc? Obviously it's not a good situation and it should be ...