There are four different types of access modifiers: public, private, protected, and default (no keyword).
Protected access modifier is similar to private access modifier in that it can only be accessed outside of its class with the help of a buddy class; but, class members defined as Protected can also be accessed by any subclass(derived class) of that class.
Access modifiers are used to control the visibility of classes, interfaces, variables, methods, constructors, data members, and setter methods in Java. Class Animal, for example, has public void method1()... private void method2()...
Modifiers are Java keywords that allow us to change the attributes of a variable, method, or class while also limiting its scope.
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