Adding a class to an ArrayList, but got NullPointerException
49
What is a NullPointerException, and how do I fix it?
23964
Why does Java have a "NullPointerException" when there are no pointers in Java?
73120
Nullpointerexception when trying to send data from activity to class
64200
Can Java's NullPointerException be changed to report on which variable was null?
105667
How do I put an arraylist in a Listbox
111535
Why does the ArrayList implementation use Object[]?
42612
Generics, arrays, and the ClassCastException
124773
NullPointerException when calling service in onResume
73034
StringBuilder append() and null values
10818
NullPointerException : println needs a message in android
94342
Java - class.getResource returns null
134907
Converting 'ArrayList to 'String[]' in Java
480
What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
37988
System.NullPointerException: Attempt to de-reference a null object:
98866
Null Pointer Exception on getGraphics()
130819
Nullpointerexception while setting a bean
67299
"Instantiating" a List in Java?