Java/C3/Calling-methods-of-the-superclass/English-timed - Revision history

Pratik kamble at 05:06, 3 May 2019

2019-05-03T05:06:43Z

Sandhya.np14 at 16:32, 26 September 2018

2018-09-26T16:32:07Z

Sandhya.np14 at 16:31, 26 September 2018

2018-09-26T16:31:37Z

Jyotisolanki at 07:16, 18 October 2017

2017-10-18T07:16:05Z

Sandhya.np14 at 06:38, 17 May 2017

2017-05-17T06:38:27Z

Sandhya.np14 at 06:29, 17 May 2017

2017-05-17T06:29:25Z

Sandhya.np14 at 06:17, 17 May 2017

2017-05-17T06:17:46Z

Pratik kamble at 14:03, 20 February 2017

2017-02-20T14:03:31Z

PoojaMoolya: Created page with " {| border=1 | '''Time''' | '''Narration''' |- | 00:01 | Welcome to the spoken-tutorial on '''Calling methods of the super class.''' |- |..."

2016-08-12T08:41:53Z

Created page with " {| border=1 | <center>'''Time'''</center> | <center>'''Narration'''</center> |- | 00:01 | Welcome to the spoken-tutorial on '''Calling methods of the super class.''' |- |..."

New page

{| border=1
| <center>'''Time'''</center>
| <center>'''Narration'''</center>

|-
| 00:01
| Welcome to the spoken-tutorial on '''Calling methods of the super class.'''

|-
| 00:07
| In this tutorial we will learn ; when to use the '''super keyword'''

|-
| 00:13
| How to call '''methods '''of the '''super class'''

|-
| 00:17
| How to invoke the '''constructor '''of the '''super class'''

|-
| 00:22
| Here we are using

* '''Ubuntu Version 12.04'''
* '''JDK 1.7'''
* '''Eclipse 4.3.1'''

|-
| 00:32
| To follow this tutorial, you must have basic knowledge of '''Java and Eclipse IDE.'''

|-
| 00:39
| You must also have knowledge of '''subclassing '''and '''method overriding''' in Java.

|-
| 00:45
| If not, for relevant tutorials, please visit our website.

|-
| 00:51
| A '''subclass '''can use a '''superclass''' '''data '''or '''method '''using the '''super keyword.'''

|-
| 00:58
| The '''super keyword ''':
* refers to the '''instance variable''' of the '''parent class.'''
* is used to invoke '''parent class constructor'''.
* is used to invoke '''parent class method.'''

|-
| 01:13
| Now, let us go to the '''IDE '''and to the '''project '''we created earlier.

|-
| 01:19
| Let us go to the '''Manager class.'''

|-
| 01:22
| Now, come to the '''getDetails() method.'''

|-
| 01:26
| In the '''return '''statement, let us remove '''Name '''and '''Email.'''

|-
| 01:32
| Now, let us come to the '''Employee class.'''

|-
| 01:36
| This is the '''parent class '''or '''super class.'''

|-
| 01:41
| We already have a '''getDetails() method '''here'''.'''

|-
| 01:46
| This method '''returns '''the '''name '''and '''email.'''

|-
| 01:51
| So, we can use this '''getDetails() method '''in the '''Manager class.'''

|-
| 01:57
| We will call '''getDetails() method '''from the '''Employee class, '''inside the '''Manager class.'''

|-
| 02:04
| So, come to the '''getDetails() method ''' in the manager class.

|-
| 02:10
| Inside the '''return statement '''type '''super dot getDetails() '''''plus slash n '''''Manager of '''''get '''''department.'''

|-
| 02:22
| Now, let me '''run''' the '''program '''

|-
| 02:25
| We can see that we get the '''Manager details.''' thus we can call the method of superclass inside the subclass

|-
| 02:36
| Now let us come to the '''Employee class.'''

|-
| 02:41
| Let us include a '''constructor '''here.

|-
| 02:44
| So inside the '''Employee class, '''type '''public space''' '''Employee '''''within brackets '''''String name, String email_address '''

|-
| 02:59
| Within curly brackets, type '''this dot''' '''name is equal to name semicolon'''. '''this dot''' '''email_address is equal to email_address '''

|-
| 03:17
| Now let us comment the '''setter '''and '''getter methods.'''

|-
| 03:23
| Inside the '''getDetails() method, '''

* instead of '''getName '''type '''name, '''
* instead of '''getEmail '''type '''email_address.'''

|-
| 03:37
| A '''subclass '''inherits all of the '''methods '''and '''variables '''from a '''parent class'''.

|-
| 03:44
| Note that it does not '''inherit constructors.'''

|-
| 03:49
| But, '''constructors '''can call the '''non-private constructors '''of its '''superclass.'''

|-
| 03:55
| We do this using the keyword '''super '''from the '''child class constructor.'''

|-
| 04:01
| We will see that now.

|-
| 04:04
|For that, come to the '''Manager class.''' We will include a '''constructor '''here.

|-
| 04:10
| So, type '''public space''' '''Manager '''''within brackets '''''String '''''space '''''name, String space''' '''email ''' underscore '''address, String space''' '''dept '''

|-
| 04:30
|Then within curly brackets, type '''super '''''within brackets '''''name, email underscore address semicolon'''

|-
| 04:44
|Then type, '''department is equal to''' '''dept semicolon'''

|-
| 04:51
| Here we will comment the '''setter and getter methods.'''

|-
| 04:56
| Then, in the '''getDetails() method '''type '''department '''instead of '''getDepartment.'''

|-
| 05:05
| Now, come to the '''TestEmployee class.'''

|-
| 05:09
| Comment the call to the '''setter methods.'''

|-
| 05:15
| Now, inside the call to the '''Manager constructor '''type ''within quotes '''''Nikkita Dinesh, abc@gmail.com, Accounts'''

|-
| 05:32
| Now, run the '''program.'''

|-
| 05:35
| We get the output as shown. We get the '''Manager details.'''

|-
| 05:40
| In this way, we can call the '''constructor '''of the '''super class.'''

|-
| 05:45
| In this tutorial we have learnt:

* the '''super keyword '''
* calling the method of the '''super class '''and
* invoking constructor of '''super class'''

|-
| 05:56
| As an Assignment

* Open the previous assignment.
* Call the '''Vehicle class run method '''in the '''Bike class.'''

|-
| 06:04
|* The output should be:
** '''The Vehicle is running.'''
** '''The Bike is running safely.'''

|-
| 06:10
| To know more about the Spoken Tutorial Project, Watch the video available at the following link

|-
| 06:17
| It summarizes the Spoken Tutorial project . If you do not have good bandwidth, you can download and watch it

|-
| 06:26
| The Spoken Tutorial Project Team

* Conducts workshops using spoken tutorials

* Gives certificates for those who pass an online test

* For more details, please write to contact at spoken hyphen tutorial dot org

|-
| 06:42
| Spoken Tutorial Project is a part of the Talk to a Teacher project

|-
| 06:46
| It is supported by the National Mission on Education through ICT, MHRD, Government of India

|-
| 06:54
| More information on this Mission is available at http://spoken-tutorial.org/NMEICT- Intro

|-
| 07:05
|This is '''Arya Ratish '''from '''IIT Bombay '''signing off. Thanks for joining.

|}

@@ Line 221: / Line 221: @@
 |-
 | 06:26
-| The Spoken Tutorial Project Team: Conducts workshops using spoken tutorials
+|The Spoken Tutorial Project Team: Conducts workshops using spoken tutorials
-  Gives certificates for those who pass an online test. For more details, please write to '''contact at spoken hyphen tutorial dot org'''.
+Gives certificates for those who pass an online test. For more details, please write to '''contact at spoken hyphen tutorial dot org'''.
 |-

@@ Line 44: / Line 44: @@
 | 00:58
 | The '''super''' keyword :
 refers to the '''instance variable''' of the '''parent class,'''
 is used to invoke '''parent class constructor''',
 is used to invoke '''parent class method.'''

@@ Line 43: / Line 43: @@
 |-
 | 00:58
-| The '''super''' keyword :   refers to the '''instance variable''' of the '''parent class.'''   is used to invoke '''parent class constructor'''.  is used to invoke '''parent class method.'''
+| The '''super''' keyword :
 |-

@@ Line 11: / Line 11: @@
 |-
 | 00:07
-| In this tutorial, we will learn: * when to use the '''super keyword'''
+| In this tutorial, we will learn:   when to use the '''super keyword'''
 |-
 | 00:13
-|* How to call '''methods '''of the '''super class'''
+|  How to call '''methods '''of the '''super class'''
 |-
 | 00:17
-|* How to invoke the '''constructor '''of the '''super class'''.
+|  How to invoke the '''constructor '''of the '''super class'''.
 |-
 | 00:22
-| Here we are using:
+| Here we are using: '''Ubuntu Version 12.04''' ,'''JDK 1.7''' ,'''Eclipse 4.3.1'''
-−
-*'''Ubuntu Version 12.04'''
-−
-*'''JDK 1.7'''
-−
-*'''Eclipse 4.3.1'''
 |-
@@ Line 49: / Line 43: @@
 |-
 | 00:58
-| The '''super''' keyword :
+| The '''super''' keyword :   refers to the '''instance variable''' of the '''parent class.'''   is used to invoke '''parent class constructor'''.  is used to invoke '''parent class method.'''
-* refers to the '''instance variable''' of the '''parent class.'''
-* is used to invoke '''parent class constructor'''.
-* is used to invoke '''parent class method.'''
 |-
@@ Line 124: / Line 115: @@
 |-
 | 02:59
-| Within curly brackets, type:
+| Within curly brackets, type: '''this dot name is equal to name semicolon''' , '''this dot email_address is equal to email_address'''
 '''this dot name is equal to name semicolon'''
 '''this dot email_address is equal to email_address'''
 |-
@@ Line 134: / Line 123: @@
 |-
 | 03:23
-| Inside the '''getDetails()''' method-
+| Inside the '''getDetails()''' method-  instead of '''getName''', type '''name''' , instead of '''getEmail''', type '''email_address.'''
-−
 instead of '''getName''', type '''name'''
-−
 instead of '''getEmail''', type '''email_address.'''
 |-
@@ Line 210: / Line 195: @@
 |-
 | 05:45
-| In this tutorial, we have learnt:
+| In this tutorial, we have learnt: the '''super keyword ''' ,calling the method of the '''super class '''and  invoking constructor of '''super class'''.
-* the '''super keyword '''
-* calling the method of the '''super class '''and
-* invoking constructor of '''super class'''.
 |-
 | 05:56
-| As an Assignment-
+| As an Assignment-Open the previous assignment. Call the '''Vehicle class run method '''in the '''Bike class.'''
 Open the previous assignment.
 Call the '''Vehicle class run method '''in the '''Bike class.'''
 |-
 | 06:04
-| The output should be:
+| The output should be: '''The Vehicle is running.''' '''The Bike is running safely.'''
-−
 '''The Vehicle is running.'''
 '''The Bike is running safely.'''
 |-
@@ Line 238: / Line 215: @@
 |-
 | 06:26
-| The Spoken Tutorial Project Team:
+| The Spoken Tutorial Project Team: Conducts workshops using spoken tutorials
-* Conducts workshops using spoken tutorials
+  Gives certificates for those who pass an online test. For more details, please write to '''contact at spoken hyphen tutorial dot org'''.
-* Gives certificates for those who pass an online test.
 For more details, please write to '''contact at spoken hyphen tutorial dot org'''.
 |-
@@ Line 253: / Line 228: @@
 |-
 | 06:54
-| 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 137: / Line 137: @@
 instead of '''getName''', type '''name'''
 instead of '''getEmail''', type '''email_address.'''
@@ Line 165: / Line 166: @@
 |-
 | 04:10
-| So, type '''public space''' '''Manager '''''within brackets '''''String '''''space '''''name, String space''' '''email ''' underscore '''address, String space''' '''dept '''
+| So, type: '''public''' ''space'' '''Manager''' within brackets '''String''' ''space '' '''name comma String''' space '''email underscore address comma String''' space '''dept '''.
 |-
 | 04:30
-|Then within curly brackets, type '''super '''''within brackets '''''name, email underscore address semicolon'''
+|Then, within curly brackets, type: '''super '''within brackets '''name, email underscore address semicolon'''.
 |-
 | 04:44
-|Then type, '''department is equal to''' '''dept semicolon'''
+|Then type: '''department is equal to dept semicolon'''.
 |-
 | 04:51
-| Here we will comment the '''setter and getter methods.'''
+| Here we will comment the '''setter''' and '''getter''' methods.
 |-
 | 04:56
-| Then, in the '''getDetails() method '''type '''department '''instead of '''getDepartment.'''
+| Then, in the '''getDetails()''' method type: '''department '''instead of '''getDepartment.'''
 |-
 | 05:05
-| Now, come to the '''TestEmployee class.'''
+| Now, come to the '''TestEmployee''' class.
 |-

@@ Line 7: / Line 7: @@
 |-
 | 00:01
-| Welcome to the spoken-tutorial on '''Calling methods of the super class.'''
+| Welcome to the '''spoken-tutorial''' on '''Calling methods of the super class.'''
 |-
 | 00:07
-| In this tutorial we will learn ;  when to use the '''super keyword'''
+| In this tutorial, we will learn: * when to use the '''super keyword'''
 |-
 | 00:13
-| How to call '''methods '''of the '''super class'''
+|* How to call '''methods '''of the '''super class'''
 |-
 | 00:17
-| How to invoke the '''constructor '''of the '''super class'''
+|* How to invoke the '''constructor '''of the '''super class'''.
 |-
 | 00:22
-| Here we are using
+| Here we are using:
-'''Ubuntu Version 12.04'''
+*'''Ubuntu Version 12.04'''
 '''JDK 1.7'''
-'''Eclipse 4.3.1'''
+*'''JDK 1.7'''
 |-
@@ Line 43: / Line 45: @@
 |-
 | 00:51
-| A '''subclass '''can use a '''superclass''' '''data '''or '''method '''using the '''super keyword.'''
+| A '''subclass '''can use a '''superclass''' '''data '''or '''method '''using the '''super''' keyword.
 |-
 | 00:58
-| The '''super keyword ''':
+| The '''super''' keyword :
-refers to the '''instance variable''' of the '''parent class.'''
+* refers to the '''instance variable''' of the '''parent class.'''
-is used to invoke '''parent class constructor'''.
+* is used to invoke '''parent class constructor'''.
-is used to invoke '''parent class method.'''
+* is used to invoke '''parent class method.'''
 |-
@@ Line 62: / Line 64: @@
 |-
 | 01:22
-| Now, come to the '''getDetails() method.'''
+| Now, come to the '''getDetails()''' method.
 |-
@@ Line 78: / Line 80: @@
 |-
 | 01:41
-| We already have a '''getDetails() method '''here'''.'''
+| We already have a '''getDetails()''' method here.
 |-
 | 01:46
-| This method '''returns '''the '''name '''and '''email.'''
+| This method returns the '''name '''and '''email.'''
 |-
 | 01:51
-| So, we can use this '''getDetails() method '''in the '''Manager class.'''
+| So, we can use this '''getDetails()''' method in the '''Manager class.'''
 |-
 | 01:57
-| We will call '''getDetails() method '''from the '''Employee class, '''inside the '''Manager class.'''
+| We will call '''getDetails()''' method from the '''Employee class, '''inside the '''Manager class.'''
 |-
 | 02:04
-| So, come to the '''getDetails() method ''' in the manager class.
+| So, come to the '''getDetails() method ''' in the '''manager''' class.
 |-
 | 02:10
-| Inside the '''return statement '''type '''super dot getDetails() '''''plus slash n '''''Manager of '''''get '''''department.'''
+| Inside the '''return''' statement, type: '''super dot getDetails()''' ''plus slash'' n '''Manager of  getDepartment().'''
 |-
 | 02:22
-| Now, let me '''run''' the '''program '''
+| Now, let me '''run''' the program.
 |-
 | 02:25
-| We can see that we get the '''Manager details.''' thus we can call the method of superclass inside the subclass
+| We can see that we get the '''Manager''' details. Thus we can call the method of '''superclass''' inside the '''subclass'''.
 |-
@@ Line 118: / Line 120: @@
 |-
 | 02:44
-| So inside the '''Employee class, '''type  '''public space''' '''Employee '''''within brackets '''''String name, String email_address '''
+| So, inside the '''Employee class, '''type:  '''public''' space '''Employee ''' within brackets '''String name, String email_address '''.
 |-
 | 02:59
-| Within curly brackets, type '''this dot''' '''name is equal to name semicolon'''. '''this dot''' '''email_address is equal to email_address '''
+| Within curly brackets, type:
 |-
 | 03:17
-| Now let us comment the '''setter '''and '''getter methods.'''
+| Now, let us comment the '''setter '''and '''getter''' methods.
 |-
 | 03:23
-| Inside the '''getDetails() method, '''
+| Inside the '''getDetails()''' method-
-instead of '''getName '''type '''name, '''
+instead of '''getName''', type '''name'''
-instead of '''getEmail '''type '''email_address.'''
+instead of '''getEmail''', type '''email_address.'''
 |-
 | 03:37
-| A '''subclass '''inherits all of the '''methods '''and '''variables '''from a '''parent class'''.
+| A '''subclass '''inherits all of the methods and variables from a '''parent class'''.
 |-
 | 03:44
-| Note that it does not '''inherit constructors.'''
+| Note that it does not inherit '''constructors.'''
 |-