NullPointerException - Trying to access object before it's properly instantiated?
49
What is a NullPointerException, and how do I fix it?
87728
ArgumentNullException or NullReferenceException from extension method?
46944
Null pointer Exception - findViewById()
35129
Why does String.valueOf(null) throw a NullPointerException?
142913
How do you get the "object reference" of an object in java when toString() and hashCode() have been overridden?
68787
Why The constructor ArrayAdapter(new View.OnKeyListener(){}, int, String[]) is undefined
146476
Java: Why aren't NullPointerExceptions called NullReferenceExceptions?
73839
How to access an object from another class?
39598
Appending to an ObjectOutputStream
128142
java.lang.NullPointerException at org.apache.jsp.foo_jsp._jspInit(foo_jsp.java:22)
289
What is a NullReferenceException, and how do I fix it?
150853
An object reference is required to access non-static member
88920
Is using NULL references OK?
480
What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
126943
Instantiate objects in a List and use it
27212
Variables might not have been initialized
133927
Java variable might not have been initialized?