I don't understand how a java.lang.NullPointerException is caused
49
What is a NullPointerException, and how do I fix it?
128709
Why is there a `null` value in JavaScript?
33103
How come invoking a (static) method on a null reference doesn't throw NullPointerException?
98866
Null Pointer Exception on getGraphics()
58054
When is it OK to catch NullPointerException?
133927
Java variable might not have been initialized?
93104
What is a NumberFormatException and how can I fix it?
138823
Why cast null to Object?
55830
What's the rationale for null terminated strings?
114349
What is a null-terminated string?
28147
java: (String[])List.toArray() gives ClassCastException
10867
How to avoid ArrayIndexOutOfBoundsException or IndexOutOfBoundsException?
64200
Can Java's NullPointerException be changed to report on which variable was null?
98780
Test Method throwing null pointer exception on custom setting
79477
Why is "null" present in C# and Java?
38780
Checking for null before ToString()
56606
Why is main() in java void?