Access Modifier

Access Modifiers

1. private
2. protected
3. default
4. public

public access modifier:
Fields, methods and constructors declared public within a public class are visible to any class in the Java program, whether these classes are in the same package or in another package.
Ex: public String name;

private access modifier:
they cannot be accesses by anywhere outside the enclosing class. A standard design strategy is to make all fields private and provide public getter and setter methods for them.
Ex: private int balance;

protected access modifier:
Fields, methods and constructors declared protected in a class(say superClass) is accessed in same class,same package and subclass deriving the class(superClass)
Ex: protected float age;

default access modifier:
Any class, field, method or constructor that has no declared access modifier is accessible only by classes in the same package. 
Ex:  String interest

	Same Class	Same Package	Subclass	Other packages
public	Y	Y	Y	Y
protected	Y	Y	Y	N
default	Y	Y	N	N
private	Y	N	N	N