Java/C2/Default-constructor/Gujarati

Time'	Narration
00:02	જાવામાં default constructor પરનાં સ્પોકન ટ્યુટોરીયલમાં સ્વાગત છે.
00:07	આ ટ્યુટોરીયલમાં આપણે શીખીશું
00:10	default constructor વિશે.
00:12	અને constructor ને બનાવવું.
00:15	અહીં આપણે વાપરી રહ્યા છીએ ઉબુન્ટુ આવૃત્તિ ૧૧.૧૦ જાવા ડેવલપમેંટ એન્વાયર્નમેંટ જેડીકે ૧.૬ અને એક્લીપ્સ ૩.૭.૦
00:26	આ ટ્યુટોરીયલનાં અનુસરણ માટે તમને જાણ હોવી જરૂરી છે કે
00:29	જાવામાં કેવી રીતે એક્લીપ્સની મદદથી ક્લાસ અને ક્લાસનું ઓબ્જેક્ટ બનાવવું.
00:34	જો નથી, તો સંદર્ભિત ટ્યુટોરીયલો માટે બતાવ્યા મુજબ અમારી વેબસાઈટ જુઓ, (http://www.spoken-tutorial.org)
00:42	Constructor દ્રષ્ટાંત વેરીએબલોને પ્રારંભ કરવા માટે વપરાય છે.
00:46	તેને નવું ઓબ્જેક્ટ બનાવતી વખતે કોલ કરવામાં આવે છે.
00:50	ચાલો હવે જોઈએ જાવામાં constructor ને કેવી રીતે વ્યાખ્યાયિત કરવું.
00:55	તો એક્લીપ્સમાં, મેં પહેલાથી જ જાવા ફાઈલ, Student.java બનાવી છે.
01:02	Student ક્લાસમાં આપણે બે વેરીએબલો જાહેર કરીશું.
01:07	તો ટાઈપ કરો int roll_number અર્ધવિરામ અને String name અર્ધવિરામ.
01:20	Now let us create a method.
01:22	So type void studentDetail()
01:33	Within curly brackets type System dot out dot println roll_number
01:50	Then System dot out dot println name
02:03	Now in Main method we will call this method.
02:08	So let us create an object and call the method.
02:14	So type Student object name stu equal to new Student
02:28	Then stu dot method name i.estudentDetail
02:41	Save and Run the program.
02:46	We see the output zero and null.
02:49	So, the int variable roll_number has been initialized to its default value zero.
02:56	And the String name has been initialized to its default value null.
03:02	If we do not define a constructor then a default constructor is created.
03:08	Default constructor has no parameters.
03:11	It initializes the instance variables to their default value.
03:16	Now let us define a constructor.
03:18	So type Student parenthesis and curly brackets.
03:30	Remember the Constructor has the same name as the class name to which it belongs.
03:38	Constructors are also similar to methods but there are some important differences.
03:44	Save and Run the program.
03:48	We see the same output.
03:51	This is because the constructor, that we defined is same as having no constructor.
03:58	But here no default constructor is created because we have defined a constructor.
04:06	Now lets give values to our variables.
04:11	So inside the constructor type roll_number equal to ten semicolon.
04:25	And name equal to within double quotes Raman
04:35	Now Save and Run the program.
04:43	We see in the output that the roll_number value is ten and name is Raman.
04:50	So the constructor initializes the instance field.
04:55	Now let us see some difference between method and a constructor.
05:01	Constructor does not have a return type.
05:05	Whereas Method has a return type.
05:10	Constructor is called using the new operator.
05:16	Whereas the Method is called using the dot operator.
05:21	So this were some differences between constructor and method.
05:29	So in this tutorial, we have learnt
05:32	About the default constructor.
05:34	To define a contructor.
05:36	And Differences between method and constructor.
05:41	For self assessment,
05:42	Create a class Employee with variables and a method to display variables.
05:47	And Create a constructor for the class Employee.
05:52	To know more about the Spoken Tutorial Project
05:54	Watch the video available at http://spoken-tutorial.org/What_is_a_Spoken_Tutorial
06:00	It summarizes the Spoken Tutorial project
06:03	If you do not have good bandwidth, you can download and watch it
06:06	The Spoken Tutorial Project Team
06:08	Conducts workshops using spoken tutorials
06:11	Gives certificates to those who pass an online test
06:14	For more details, please write to contact@spoken-tutorial.org
06:20	Spoken Tutorial Project is a part of the Talk to a Teacher project
06:24	It is supported by the National Mission on Education through ICT, MHRD, Government of India
06:29	More information on this Mission is available at http://spoken-tutorial.org/NMEICT-Intro
06:38	This brings us tothe end of the tutorial.
06:40	Thanks for joining.
06:42	This is Prathamesh Salunke signing off. Jai Hind.

Contributors and Content Editors

Jyotisolanki, Krupali, PoojaMoolya, Pratik kamble