45+ Java Public Private Protected Default US. What happened is that java conflated horizontal (lattice) and vertical access. Also, java modifiers knowledge is a requirement before we go into discussing things like encapsulation or design patterns.
These access level modifiers determine whether other classes can use a particular field or invoke a particular method.
You must have seen public, private and protected keywords while practising java programs, these are called access modifiers. Public, private, protected and default. You know this modifier from the lesson about getters and setters. Access level modifiers in java (public, private, protected, default) are used to control the visibility of the class or the members of the class i.e.