What does "java.lang.NullPointerException: Attempt to invoke virtual method '...' on a null object reference" mean, and how do I solve it?
49
What is a NullPointerException, and how do I fix it?
37988
System.NullPointerException: Attempt to de-reference a null object:
124773
NullPointerException when calling service in onResume
80299
Java Error: Cannot make a static reference to the non-static method
89755
Why is "throw null" not creating a compilation error in Java?
81518
Find out what variable is throwing a NullPointerException programmatically
29684
How to check if an object is nullable?
140738
Does setting Java objects to null do anything anymore?
96843
What will happen when I call a member function on a NULL object pointer?
33103
How come invoking a (static) method on a null reference doesn't throw NullPointerException?
128316
i found Null pointer exception while executing testng in selenium
2116
IllegalArgumentException or NullPointerException for a null parameter?
80018
Accessing class members on a NULL pointer
58054
When is it OK to catch NullPointerException?
156400
NullReferenceException when using NUnit
56124
Why do I get "Exception; must be caught or declared to be thrown" when I try to compile my Java code?
35129
Why does String.valueOf(null) throw a NullPointerException?