Can we use static variable in inner class?
And like static class methods, a static nested class cannot refer directly to instance variables or methods defined in its enclosing class: it can use them only through an object reference. Inner Class and Nested Static Class Example demonstrates this. Inner Class and Nested Static Class Example also demonstrates this.
What is a non-static method?
A non-static method in Java does not have the key word ‘static’ before the name of the method. A non-static method belongs to an object of the class, and you have to create an instance of the class to access the non-static method.
Can you have instance variables and static methods in apex?
In Apex, you can have static methods, variables, and initialization code. However, Apex classes can’t be static. You can also have instance methods, member variables, and initialization code, which have no modifier, and local variables. Static methods, variables, and initialization code have these characteristics.
What does static initialization code in apex mean?
Static initialization code is a block of code preceded with the keyword static. Similar to other static code, a static initialization code block is only initialized once on the first use of the class. A class can have any number of either static or instance initialization code blocks.
Are there static methods and variables in inner classes?
Inner classes have no static methods or variables. A static method or variable doesn’t require an instance of the class in order to run. Before an object of a class is created, all static member variables in a class are initialized, and all static initialization code blocks are executed.
Can a static variable be accessed through an instance of a class?
A class static variable can’t be accessed through an instance of that class. If class MyClass has a static variable myStaticVariable, and myClassInstance is an instance of MyClass, myClassInstance.myStaticVariable is not a legal expression. The same is true for instance methods.