A Constructor
is a special method whose task is to initialize the object of its class. It is
special because its name is the same as the class name. They do not have
return types, not even void and therefore they cannot return values. They
cannot be inherited, though a derived class can call the base class
constructor. Constructor is invoked whenever an object of its associated
class is created.
whereas Methods refers to group of statement enclosed within curly braces{}.Its name should be other the name of class.
|
Constructors
|
Methods
|
Purpose
|
Create
an instance of a class
|
Group
Java statements
|
Modifiers
|
Cannot
be abstract, final, native, static, or synchronized
|
Can
be abstract, final, native, static, or synchronized
|
Return
Type
|
No
return type, not even void
|
void
or a valid return type
|
Name
|
Same
name as the class (first letter is capitalized by convention) -- usually a
noun
|
Any
name except the class. Method names begin with a lowercase letter by
convention -- usually the name of an action
|
This
|
Refers
to another constructor in the same class. If used, it must be the first line
of the constructor
|
Refers
to an instance of the owning class. Cannot be used by static methods.
|
super
|
Calls
the constructor of the parent class. If used, must be the first line of the
constructor
|
Calls
an overridden method in the parent class
|
Inheritance
|
Constructors
are not inherited
|
Methods
are inherited
|
Enjoy Reading.
No comments:
Post a Comment