what is the difference between `public class` and just `class`?

Question

I have noticed that if don\'t write public before a class its works same as like a public class. I can\'t understand why so? It should show a error

Answer 1

For declarations of classes are avaible only two keywords:

• public .Example: public class Student{//...}
• private package(as default) .Example: class Note{//...} .It is visible only in his package.

You can use private and protected only if you declare an member inside of a class. Example:

public class Student{
protected Note note;
}