Public: Public is an access modifier in Java that allows unrestricted visibility for classes, methods, and variables. They can be accessed from anywhere within the program.
Private: Private is an access modifier in Java that restricts the visibility of classes, methods, and variables to only within their own class. They cannot be accessed from outside the class.
Protected: Protected is an access modifier in Java that provides visibility within the same package as well as subclasses outside the package. It allows limited accessibility compared to public but more than private.