Access Specifiers and Modifiers

Access Specifiers:

1. default: accessible to the same package
2. public: accessible to all
3. protected: accessible to same package or subclasses of other package
4. private: Accessible to same class only

Table for Visibility of private, default, protected and public Specifiers:

Access Specifier	Same Class	Non Sub-Class in same package	Sub-Class in same package	Sub-Class in different package	Non Sub-Class in different package
private	Y	N	N	N	N
default	Y	Y	Y	N	N
protected	Y	Y	Y	Y	N
public	Y	Y	Y	Y	Y

Access Modifiers: 

• static: creating class level methods and class level variables
• abstract: creating abstract classes and methods
• final class: cannot inheritable
• final method: cannot be overridden
• final variable: After initialize cannot change the value
• synchronized and volatile: used in Multi-Threading

Members of  Class	Valid Modifiers
Data Members	private, protected, public, no-specifier, final, static, volatile and transient
Methods	private, protected, public, no-specifier, final, static, abstract, synchronized and default
Constructors	private, protected, public and no-specifier
Class	public, no-specifier, final and abstract
Nested Classes	private, protected, public, no-specifier, final, static and abstract