This modifier allows the class member to be accessed from anywhere in the program, provided the class is imported if it’s in a different package.

This access modifier allows the class member to be accessed within the same package and by subclasses outside the package.

This access modifier restricts access to the same class only; it is not visible to subclasses or other classes.

This keyword can be used for variables, methods, or classes to prevent modification, overriding, or inheritance.