The four permission modifier java

java permission modifier piublic, protected, private, a former member of the definitions in the class used to define access to objects of the class members.

Modifiers	Inner classes	The same package	Subclass	Anywhere
private	yes
(default)	yes	yes
protected	yes	yes	yes
public	yes	yes	yes	yes

For the privilege of modifier class, and you can only use the default public:

• public class can be accessed from anywhere;
• default type can only be used inside the same package;