Java provides a number of access modifiers to help you set the level of access you want for classes as well as the fields, methods and constructors in your classes. A member has package or default accessibility when no accessibility modifier is specified.
Why need?
Access modifiers in Java help to restrict the scope of a class, constructor, variable, method or data member.
Different types of Access Modifiers
Public: Anything declared as public can be accessed from anywhere.
Private: Anything declared as private can’t be seen outside of its class.
Protected: Anything declared as protected can be accessed by classes in the same package and subclasses in the other packages.
Default modifier: Can be accessed only to classes in the same package.
Java is Object Oriented Programming Language which is used to develop window application, web application, game application etc.
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