What is the difference between class and public class?

The public keyword is an access modifier used for classes, attributes, methods and constructors, making them accessible by any other class .

All the class members declared under public will be available to everyone. The class members declared as private can be accessed only by the functions inside the class . The data members and member functions declared public can be accessed by other classes too.

A class with access specifier ‘public’ can be accessed across the packages. A package is like a folder in GUI based operating systems. For example, the “public class String” class is a public class which can be accessed across the packages. A non-public class is a class without public access specifier .

A public class has “public” visibility, which means that it is accessible to any class in any package, while a class has “default” or “package” visibility, i.e. the class is accessible only to classes inside the same package. Also if you are working only on one package then there is no difference, you can use both.