Class methods and instance methods in Java

1, method declaration, the type of the method is not preceded by the keyword static is an instance method, add static is the class method is static method.

2, the instance method can operate on the class variable operation as well as the instance variable, and the class methods (static method) can only operate on the class variable (static Varival).

3. Methods in a class can call each other, instance methods can call other methods of the class, and class methods only call class methods of that class, and cannot invoke instance methods.

4. Class methods cannot be overridden, but they can be redefined in subclasses.

Class methods and instance methods in Java