Exception in thread "main" java.lang.NullPointerException when trying to use a method in another class?
49
What is a NullPointerException, and how do I fix it?
56124
Why do I get "Exception; must be caught or declared to be thrown" when I try to compile my Java code?
69771
NullPointerException when setting attribute?
46857
Compiler warning: null reference exception
129085
What is "String args[]"? parameter in main method Java
33103
How come invoking a (static) method on a null reference doesn't throw NullPointerException?
150027
Add a button to the main_activity view with Java code
112328
Error: "an object reference is required for the non-static field, method or property..."
23964
Why does Java have a "NullPointerException" when there are no pointers in Java?
104935
Java ArrayList add() method in the instance variable section
15113
How to use an array list in Java?
87728
ArgumentNullException or NullReferenceException from extension method?
56606
Why is main() in java void?
96453
Caught Throwable or Exception is null
9605
Java - Could not find the main class
8808
Strange Java null behavior in Method Overloading
80299
Java Error: Cannot make a static reference to the non-static method