Composition: How to access non-static variables with dot notation without nullpointerexception?
49
What is a NullPointerException, and how do I fix it?
135931
What does "Method '~' of object '~' failed" at runtime mean?
140738
Does setting Java objects to null do anything anymore?
9073
Cannot make a static reference to the non-static method
66307
A field initializer cannot reference the nonstatic field, method, or property
33388
What do 3 dots next to a parameter type mean in Java?
120547
What are the rules dictating the inheritance of static variables in Java?
115601
Is it possible to have placeholders in strings.xml for runtime values?
62472
How to get the Runtime-Type of an Object dynamically (for Primitive Data Types and SObjects)
59071
Why are only final variables accessible in anonymous class?
75987
How do you use the non-default constructor for a member?
35590
How to fix NullPointerException in Java?
54143
Why is the default value of the string type null instead of an empty string?
493
JavaScript property access: dot notation vs. brackets?
10581
Avoiding NullPointerException in Java
91050
Why doesn't Java allow to throw a checked exception from static initialization block?
112328
Error: "an object reference is required for the non-static field, method or property..."