Java/C2/Default-constructor/English-timed - Revision history

PoojaMoolya at 09:57, 28 March 2017

2017-03-28T09:57:29Z

PoojaMoolya at 14:03, 20 February 2017

2017-02-20T14:03:13Z

Sandhya.np14 at 14:54, 7 April 2015

2015-04-07T14:54:17Z

Sandhya.np14 at 14:52, 7 April 2015

2015-04-07T14:52:29Z

Sandhya.np14 at 11:22, 31 March 2015

2015-03-31T11:22:37Z

Show changes

Gaurav at 09:13, 9 July 2014

2014-07-09T09:13:03Z

Sneha: Created page with '{| border=1 || ''Time''' || '''Narration''' |- | 00:02 | Welcome to the Spoken Tutorial on '''default''' '''constructor''' in''' java'''. |- | 00:07 | In this tutorial …'

2013-06-28T10:22:56Z

Created page with '{| border=1 || ''Time''' || '''Narration''' |- | 00:02 | Welcome to the Spoken Tutorial on '''default''' '''constructor''' in''' java'''. |- | 00:07 | In this tutorial …'

New page

{| border=1
|| ''Time'''
|| '''Narration'''

|-
| 00:02
| Welcome to the Spoken Tutorial on '''default''' '''constructor''' in''' java'''.

|-
| 00:07
| In this tutorial we will learn

|-
| 00:10
| About the default constructor.

|-
| 00:12
| And to create a constructor.

|-
| 00:15
| Here we are using

* Ubuntu version 11.10
* Java Development Environment jdk 1.6 and
* Eclipse 3.7.0

|-
| 00:26
| To follow this tutorial you must know

|-
| 00:29
| how to create a class and the object of the class in '''java''' using '''eclipse'''.

|-
| 00:34
| If not, for relevant tutorials please visit our website which is as shown,

(http://www.spoken-tutorial.org)

|-
| 00:42
| '''Constructor''' is used to initialize the instance variables.

|-
| 00:46
| It is called at the creation of new object.

|-
| 00:50
| Let us now see how '''constructor''' is defined in java.

|-
| 00:55
| So in the '''eclipse,''' I have already created a java file, '''Student.java'''

|-
| 01:02
| In the Student class we will declare two variables.

|-
| 01:07
| So type '''''int''''' '''''roll_number''''' ''semi-colon'' and '''''String''''' '''''name''''' semi''-colon.''

|-
| 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.e'''''studentDetail'''''

|-
| 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 http://spoken-][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial 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 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.

|}

@@ Line 218: / Line 218: @@
 |-
 |  05:41
-|  For self assessment,
+|  For self assessment, create a '''class''' '''Employee''' with variables and a  '''method''' to display variables.
-−
-|-
-|  05:42
-| create a '''class''' '''Employee''' with variables and a  '''method''' to display variables.
 |-
@@ Line 233: / Line 229: @@
 |-
 |  05:54
-|  watch the video available at [http://spoken-tutorial.org/What_is_a_Spoken_Tutorial].
+|  watch the video available at http://spoken-tutorial.org/What_is_a_Spoken_Tutorial.
 |-
@@ Line 269: / Line 265: @@
 |-
 |  06:29
-| More information on this mission is available at: [http://spoken-tutorial.org/NMEICT-Intro].
+| More information on this mission is available at: http://spoken-tutorial.org/NMEICT-Intro.
 |-

@@ Line 13: / Line 13: @@
 |-
 |  00:10
-|*  About the default constructor.
+| About the default constructor.
 |-
 |  00:12
-|*  And  to create a constructor.
+|And  to create a constructor.
 |-
 |  00:15
 |  Here we are using:
-* '''Ubuntu version 11.10'''
+'''Ubuntu version 11.10'''
-* '''Java Development Environment jdk 1.6''' and
+'''Java Development Environment jdk 1.6''' and
-*  '''Eclipse 3.7.0'''
+'''Eclipse 3.7.0'''
 |-
@@ Line 36: / Line 36: @@
 |-
 |  00:34
-| If not, for relevant tutorials, please visit our website which is as shown.
+| If not, for relevant tutorials, please visit our website which is as shown.http://www.spoken-tutorial.org
 http://www.spoken-tutorial.org
 |-
@@ Line 209: / Line 208: @@
 |-
 |  05:32
-|* About the default '''constructor'''.
+|About the default '''constructor'''.
 |-
 |  05:34
-|* To define a '''constructor'''.
+|To define a '''constructor'''.
 |-
 |  05:36
-|* And Differences between '''method''' and '''constructor.'''
+|And Differences between '''method''' and '''constructor.'''
 |-
@@ Line 270: / Line 269: @@
 |-
 |  06:29
-| More information on this mission is available at:
+| More information on this mission is available at: [http://spoken-tutorial.org/NMEICT-Intro].
 [http://spoken-tutorial.org/NMEICT-Intro].
 |-

@@ Line 21: / Line 21: @@
 |-
 |  00:15
-|  Here we are using
+|  Here we are using:
 * '''Ubuntu version 11.10'''
 * '''Java Development Environment jdk 1.6''' and
@@ Line 101: / Line 101: @@
 |-
 |   02:46
-| We see the output zero and null.
+| We see the output 'zero' and 'null'.
 |-

@@ Line 5: / Line 5: @@
 |-
 |  00:02
-|  Welcome to the Spoken Tutorial on '''default''' '''constructor''' in''' java'''.
+|  Welcome to the Spoken Tutorial on '''Default constructor''' in''' java'''.
 |-
@@ Line 13: / Line 13: @@
 |-
 |  00:10
-|  About the default constructor.
+|*  About the default constructor.
 |-
 |  00:12
-|  And  to create a constructor.
+|*  And  to create a constructor.
 |-
 |  00:15
-|   Here we are using
+|  Here we are using
-* Ubuntu version 11.10
+* '''Ubuntu version 11.10'''
-* Java Development Environment jdk 1.6 and
+* '''Java Development Environment jdk 1.6''' and
-*  Eclipse 3.7.0
+*  '''Eclipse 3.7.0'''
 |-
@@ Line 36: / Line 36: @@
 |-
 |  00:34
-| If not, for relevant tutorials please visit our website which is as shown.
+| If not, for relevant tutorials, please visit our website which is as shown.
 http://www.spoken-tutorial.org
 |-
 |  00:42
-|  '''Constructor''' is used to initialize the instance variables.
+|  '''Constructor''' is used to initialize the '''instance''' variables.
 |-
@@ Line 49: / Line 49: @@
 |-
 |  00:50
-|  Let us now see how '''constructor''' is defined in java.
+|  Let us now see how a '''constructor''' is defined in java.
 |-
 |  00:55
-| So in the '''eclipse,''' I have already created a java file, '''Student.java'''.
+| So, in the '''eclipse''', I have already created a java file  '''Student.java'''.
 |-
@@ Line 73: / Line 73: @@
 |-
 |  01:33
-| Within curly brackets, type: '''System''' dot '''out''' dot '''println''' '''roll_number'''
+| Within curly brackets, type: '''System''' dot '''out''' dot '''println''' '''roll_number;'''
 |-
 |  01:50
-| Then '''System''' dot '''out''' dot '''println''' '''name'''.
+| Then '''System''' dot '''out''' dot '''println''' '''name;'''.
 |-
 |02:03
-|  Now in '''Main''' '''method''' we will call this method.
+|  Now in '''main''' '''method''' we will call this method.
 |-
@@ Line 89: / Line 89: @@
 |-
 |  02:14
-| So type '''Student''' object name '''stu''' equal to '''new''' '''Student'''.
+| So, type: '''Student''' object name '''stu''' equal to '''new''' '''Student()'''.
 |-
@@ Line 101: / Line 101: @@
 |-
 |   02:46
-|   We see the output zero and null.
+| We see the output zero and null.
 |-
 |  02:49
-| So, the '''int''' variable '''roll_number''' has been initialized to its default value zero.
+| 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.
+| And the '''String''' '''name''' has been initialized to its default value 'null'.
 |-
@@ Line 129: / Line 129: @@
 |-
 |  03:18
-| So, type: '''Student''' parenthesis and curly brackets.
+| So, type: '''Student''' S capital parenthesis and curly brackets.
 |-
 |  03:30
-| Remember the '''Constructor''' has the same name as the class name to which it belongs.
+| Remember, the '''Constructor''' has the same name as the 'class name' to which it belongs.
 |-
 | 03:38
-|  '''Constructors''' are also similar to '''method'''s but there are some important differences.
+|  Constructors are also similar to '''methods''' but there are some important differences.
 |-
@@ Line 153: / Line 153: @@
 |-
 |  03:58
-| But here no default '''constructor''' is created because we have defined a '''constructor.'''
+| But here, no default '''constructor''' is created because we have defined a '''constructor.'''
 |-
@@ Line 173: / Line 173: @@
 |-
 | 04:43
-|   We see in the output that the '''roll_number''' value is '''ten''' and '''name''' is Raman.
+|   We see in the output that the '''roll_number'''  is '''ten''' and the '''name''' is Raman.
 |-
@@ Line 181: / Line 181: @@
 |-
 |  04:55
-|   Now, let us see some difference between  '''method''' and a '''constructor'''.
+|   Now, let us see some differences between  '''method''' and a '''constructor'''.
 |-
@@ Line 231: / Line 231: @@
 |-
 |  05:52
-|  To know more about the Spoken Tutorial Project
+|  To know more about the Spoken Tutorial Project,
 |-
 |  05:54
-|  Watch the video available at [http://spoken-tutorial.org/What_is_a_Spoken_Tutorial]
+|  watch the video available at [http://spoken-tutorial.org/What_is_a_Spoken_Tutorial].
 |-
@@ Line 271: / Line 271: @@
 |  06:29
 | More information on this mission is available at:
-[http://spoken-tutorial.org/NMEICT-Intro]
+[http://spoken-tutorial.org/NMEICT-Intro].
 |-

@@ Line 1: / Line 1: @@
 {| border=1
-|| ''Time'''
+|| '''Time'''
 || '''Narration'''