Java/C2/Non-static-block/Gujarati

Time'	Narration
00:02	જાવામાં નોન સ્ટેટિક બ્લોક પરના સ્પોકન ટ્યુટોરીયલમાં તમારું સ્વાગત છે.
00:06	આ ટ્યુટોરીયલ માં આપણે શીખીશું,
00:08	નોન સ્ટેટિક બ્લોક વિષે,
00:10	નોન સ્ટેટિક બ્લોક ક્યારે એક્ઝિક્યુટ થાય છે?
00:13	નોન સ્ટેટિક બ્લોક નું સરળ ઉદાહરણ
00:16	અને આપણને કન્સ્ટ્રકટર્સની જરૂર શા માટે પડે છે?
00:18	અહીં આપણે, ઉબુન્ટુઆવૃત્તિ 11.10 જાવા ડેવલપમેન્ટ એન્વાયર્નમેન્ટ jdk 1.6 અને એક્લીપ્સ IDE 3.7.0 નો ઉપયોગ કરી રહ્યા છીએ.
00:26	આ ટ્યુટોરીયલ અનુસરવા માટે તમને ખબર હોવી જોઈએ કે,
00:29	How to create a constructor in Java using Eclipse એક્લીપ્સની મદદથી જાવામાં કન્સ્ટ્રકટર કેવી રીતે બનાવવું.
00:33	જો નહી તો સંબંધિત ટ્યુટોરીયલ માટે નીચે દર્શાવેલ અમારી વેબસાઈટ જુઓ, (http://www.spoken-tutorial.org)
00:38	હવે આપણે નોન સ્ટેટિક બ્લોક શું છે તે જોઈશું.
00:42	બે કર્લી કૌંસ વચ્ચે લખાયેલ કોઈ પણ કોડ નોન સ્ટેટિક બ્લોક છે.
00:46	આપણે સીન્ટેક્ષ અહીં જોઈ શકીએ છીએ
00:51	When is a non-static block executed ?
00:54	A non-static block is executedfor each object that is created.
00:59	It executes before the constructor's execution.
01:04	It can initialize instance member variables of the class.
01:08	Any other execution like calculation could also be given in the block.
01:14	Now, let us switch to Eclipse and try to use a non-static block.
01:23	I have already opened a class named NonStaticTest in Eclipse.
01:28	I also have a created a class named A .
01:33	Now inside class A , I will first create a variable of type int.
01:38	So type int a semicolon, then press Enter
01:46	Within curly brackets type System dot out dot println within brackets and double quotes Non static block of an instance of Class A semicolon.
02:12	Then type System dot out dot println within brackets and double quotes The value of a is plus a semicolon.
02:32	Now we will declare a constructor.
02:36	So type public A opening and closing brackets, open the curly brackets press Enter.
02:51	Then type System dot out dot println within brackets and double quotes Constructing object of type A semicolon.
03:11	Then type System dot out dot println within brackets and double quotes The value of a is plus a semicolon.
03:35	Now save this file.
03:44	Inside class NonStaticTest in Eclipse let us create an object of the class A.
03:53	So type A space a1 equal to new space A opening and closing brackets semicolon
04:08	Next line we will create one more object of class A.
04:12	So type A space a2 equal to new space A opening and closing brackets semicolon.
04:25	Now Save and run the file. So press Ctrl &S and Ctrl &F11 keys
04:32	We get the output as follows:
04:35	As we can see when the first object is created, the non-static block is executed.
04:45	non-static block of an instance of class A and the instance variable A is initialized to 0.
04:53	Only after that the constructor is executed. Constructing object of type A
05:02	And here the instance variable is again initialized to 0.
05:07	Then again when the second object is created, the non-static block is executed.
05:16	This process is repeated.
05:20	We can have multiple non-static blocks in a class.
05:25	In this case they execute in the sequence in which they appear in the class.
05:30	We can try that now.
05:34	Include one more block after the first one in class A.
05:43	So again type inside curly brackets.
05:47	System dot out dot println within brackets and double quotes Second Non static block of an instance of Class A semicolon.
06:08	Then type System dot out dot println within brackets and double quotes The value of a is plus a semicolon.
06:30	Now save this file ,press Ctrl & S key simultaneously then press Ctrl & F11 to run the program.
06:44	We get the output as follows.
06:48	we see that after the first block is executed, the second is executed.
06:58	Only then the constructor is executed.
07:07	Now you might feel why do we need constructors.
07:10	The answer is we don't need the default constructor.
07:15	But the non-static block cannot be parameterized.
07:18	You cannot have objects taking values from out side.
07:22	So non-static block is not a substitute for constructor.
07:27	So let us summarizes
07:29	In this tutorial we learnt :
07:32	About non-static block and how to use this block.
07:35	For self assessment,
07:36	create a class named B.
07:39	Create a non-static block and a constructor as shown in the tutorial.
07:44	Create an object of class B in the class NonStaticTest already created.
07:49	Check the output.
07:51	To know more about the Spoken Tutorial Project
07:53	Watch the video available at http://spoken-tutorial.org/What_is_a_Spoken_Tutorial
07:56	It summarizes the Spoken Tutorial project
08:00	If you do not have good bandwidth, you can download and watch it
08:03	The Spoken Tutorial Project Team
08:06	Conducts workshops using spoken tutorials
08:08	Gives certificates for those who pass an online test
08:12	For more details, please write to contact@spoken-tutorial.org
08:18	Spoken Tutorial Project is a part of the Talk to a Teacher project
08:22	It is supported by the National Mission on Education through ICT, MHRD, Government of India
08:28	More information on this Mission is available at http://spoken-tutorial.org/NMEICT-Intro
08:37	Thus we have come to the end of this tutorial.
08:40	This is Arya Ratish from IIT BOmbay signing off. Thanks for joining.

Contributors and Content Editors

Jyotisolanki, Krupali, PoojaMoolya, Pratik kamble