Attempt to invoke virtual method Spinner.setAdapter(SpinnerAdapter) on a null object reference
49
What is a NullPointerException, and how do I fix it?
140738
Does setting Java objects to null do anything anymore?
35016
java.lang.NullPointerException at org.primefaces.component.datatable.feature.FilterFeature.filter
10581
Avoiding NullPointerException in Java
85964
Android: ClassNotFoundException when passing serializable object to Activity
134689
Setting an object to null vs Dispose()
146476
Java: Why aren't NullPointerExceptions called NullReferenceExceptions?
32065
Attempt to de-reference a null object: Trigger
35590
How to fix NullPointerException in Java?
69180
onActivityResult() called prematurely
66713
How to set selected item of Spinner by value, not by position?
144423
"No enclosing instance of type" error while calling method from another class in Android
141129
InputStream returning NullPointerException (Java)
87728
ArgumentNullException or NullReferenceException from extension method?
33103
How come invoking a (static) method on a null reference doesn't throw NullPointerException?
64332
avoiding null reference exceptions
88920
Is using NULL references OK?