How to pass an int from one class to another and specify 2 lists with that, without getting a NullPointerException?
49
What is a NullPointerException, and how do I fix it?
94973
Why type "int" is never equal to 'null'?
145642
How to convert list of intable strings to int
69771
NullPointerException when setting attribute?
73120
Nullpointerexception when trying to send data from activity to class
37988
System.NullPointerException: Attempt to de-reference a null object:
120793
Java - Generics with lists
5143
Any simple way to explain why I cannot do List animals = new ArrayList()?
89487
Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
137692
NullPointerException when working with arrays
118541
How to pass a default argument value of an instance member to a method?
131923
Optional parameters on delegates doesn't work properly
114765
Why does casting an ArrayList 's generic to a superclass not work?
88920
Is using NULL references OK?
101449
Using methods from another class in the main?
85964
Android: ClassNotFoundException when passing serializable object to Activity
10867
How to avoid ArrayIndexOutOfBoundsException or IndexOutOfBoundsException?