Java Modifier public,protected,default,private access rights

Public

Has the maximum access rights. all classes are accessible.

Protected

is primarily used to protect subclasses. itself, subclasses, and classes in the same package can access

Default

Without modifiers. Sometimes referred to as friendly, it is designed for access to this package. can be accessed in the same package.

Private

Access is limited to the inside of the class, and is an embodiment of encapsulation. can only be accessed by themselves

	Class Internal	Sub-class interior (this package)	Other classes (this package)	Intra-subclass (external package)	Other classes (external packages)
Public	O	O	O	O	O
Protected	O	O	O	O	X
Default	O	O	O	X	X
Private	O	X	X	X	X

Sample code

Package apkg

Parenta.java

 Packageapkg; Public classParenta { PublicString publicvariable = "public"; protectedString protectedvariable = "protected"; String variable= "Default"; PrivateString privatevariable = "Privater";  Public voidShow () {System.out.println ( This. publicvariable); System.out.println ( This. protectedvariable); System.out.println ( This. variable); System.out.println ( This. privatevariable); }         Public Static voidMain (string[] args) {Parenta apkg=NewParenta ();    Apkg.show (); }}

Sona.java

 Packageapkg; Public classSonAextendsParenta { Public voidShow () {System.out.println ( This. publicvariable); System.out.println ( This. protectedvariable); System.out.println ( This. variable); //System.out.println (this.privatevariable);//Cannot access    }}

Unclea.java

 package   apkg;  import   apkg. Parenta;  public  class   Unclea { public  void   show () {Parenta apkg  = new   Parenta ();        System.out.println (apkg.publicvariable);        System.out.println (apkg.protectedvariable);        System.out.println (apkg.variable);  // system.out.println ( apkg.privatevariable);  //  cannot access  }}  

Package bpkg

Sonb.java

 Packagebpkg;Importapkg. Parenta; Public classSonbextendsParenta { Public voidShow () {System.out.println ( This. publicvariable); System.out.println ( This. protectedvariable); //System.out.println (this.variable);//Cannot access//System.out.println (this.privatevariable);//Cannot access    }}

Uncleb.java

 Packagebpkg;Importapkg. Parenta; Public classUncleb { Public voidShow () {Parenta apkg=NewParenta ();        System.out.println (apkg.publicvariable); //System.out.println (apkg.protectedvariable);//Cannot access//System.out.println (apkg.variable);//Cannot access//System.out.println (apkg.privatevariable);//Cannot access    }}

Java Modifier public,protected,default,private access rights