why i get NullPointerException when i try to visit member variables after force type convert?
49
What is a NullPointerException, and how do I fix it?
93104
What is a NumberFormatException and how can I fix it?
289
What is a NullReferenceException, and how do I fix it?
96843
What will happen when I call a member function on a NULL object pointer?
69771
NullPointerException when setting attribute?
64332
avoiding null reference exceptions
66307
A field initializer cannot reference the nonstatic field, method, or property
94973
Why type "int" is never equal to 'null'?
8283
Why does null reference print as "null"
18925
Why are my fields initialized to null or to the default value of zero when I've declared and initialized them in my class' constructor?
35129
Why does String.valueOf(null) throw a NullPointerException?
98908
Is it good practice to set variables to null when they are no longer needed?
114651
ViewModel's list is null in action
37988
System.NullPointerException: Attempt to de-reference a null object:
141129
InputStream returning NullPointerException (Java)
79477
Why is "null" present in C# and Java?
130819
Nullpointerexception while setting a bean