Java/C2/Switch-Case/English-timed - Revision history

PoojaMoolya at 09:37, 28 March 2017

2017-03-28T09:37:59Z

PoojaMoolya at 07:17, 28 February 2017

2017-02-28T07:17:32Z

Sandhya.np14 at 06:52, 6 April 2015

2015-04-06T06:52:18Z

Sandhya.np14 at 06:49, 6 April 2015

2015-04-06T06:49:33Z

Sandhya.np14 at 14:36, 25 March 2015

2015-03-25T14:36:23Z

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Sandhya.np14 at 09:40, 25 March 2015

2015-03-25T09:40:39Z

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Gaurav at 09:04, 9 July 2014

2014-07-09T09:04:11Z

Sneha: Created page with ' {| border=1 || ''Time''' || '''Narration''' |- | 00:02 | Welcome to the spoken tutorial on '''Switch case in Java'''. |- | 00:06 | In this tutorial, you will learn how to…'

2013-06-03T09:44:21Z

Created page with ' {| border=1 || ''Time''' || '''Narration''' |- | 00:02 | Welcome to the spoken tutorial on '''Switch case in Java'''. |- | 00:06 | In this tutorial, you will learn how to…'

New page

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

|-
| 00:02
| Welcome to the spoken tutorial on '''Switch case in Java'''.

|-
| 00:06
| In this tutorial, you will learn how to use the '''switch case construct in Java'''

|-
| 00:11
| For this tutorial we are using

* '''Ubuntu v 11.10'''
* '''JDK 1.6''' and
* '''Eclipse 3.7.0'''

|-
| 00:21
| For this tutorial, you should have knowledge of if else statement in Java.

|-
| 00:25
| If not, please go through the tutorials on these topics available at our website which is as shown [http://spoken-tuitorial.org/ http][http://spoken-tuitorial.org/ ://][http://spoken-tuitorial.org/ spoken][http://spoken-tuitorial.org/ -][http://spoken-tuitorial.org/ tutorial][http://spoken-tuitorial.org/ .][http://spoken-tuitorial.org/ org]

|-
| 00:32
| A switch case is used to perform actions based on the value of a variable.

|-
| 00:39
| Here is the syntax for a '''switch case statement'''.

|-
| 00:44
| Let us use it now.

|-
| 00:47
| I already have '''Eclipse''' opened.

|-
| 00:49
| I have created a '''class''' named '''SwitchCaseDemo.'''

|-
| 00:53
| Now Let us add some variables.

|-
| 00:57
| Inside the main method, we will create a '''variable day''' of type '''int'''.

|-
| 01:02
| So type inside the main method''' int day '''and we can give it a value '''equal to''' '''3''' semi-colon.

|-
| 01:12
| Now, let us create a '''variable dName''' of type '''String.'''

|-
| 01:18
| String dName we can linitialize it to null.

|-
| 01:25
| Here '''dName '''is a '''variable '''to hold the names of the days of a week.

|-
| 01:34
| '''day''' stores the '''day number'''.

|-
| 01:36
| Now, we will type the '''switch case statement.'''So next line type

|-
| 01:43
| '''switch '''within brackets''' day , '''then open curly brackets... Press enter

|-
| 01:52
| This statement defines which variable is under consideration for the cases.

|-
| 01:59
| Next line '''type '''

|-
| 02:01
| '''case 0 '''''colon''

|-
| 02:04
|Next line '''dName '''''equal to within double quotes''''' Sunday '''''semicolon''

|-
| 02:14
| Then type Next line'''break '''''

|-
| 02:17
| This statement says that if the day is 0, then '''dName''' must be set to '''Sunday.'''

|-
| 02:26
| Note that a '''break''' statement must be used at the end of each case.

|-
| 02:31
| without the break statement, the switch-case functions in a complex fashion.

|-
| 02:35
| It will be explained in subsequent part of the tutorial.

|-
| 02:40
| Similarly, let us type the remaining cases.

|-
| 02:45
| Next line type '''case 1 '''''colon''

|-
| 02:50
| next line '''dName '''''equal to within double quotes''''' Monday '''''semicolon''

|-
| 02:56
| Next line type '''break '''

|-
| 02:58
|Then type '''case 2 '''''colon''

|-
| 03:01
|Next line '''dName '''''equal to ''''' Tuesday ''''' then semicolon''

|-
| 03:06
| Next line type '''break '''

|-
| 03:08
| Then next line '''case 3 '''''colon''

|-
| 03:12
| Next line type '''dName '''''equal to within double quotes''''' Wednesday ''''' then semicolon''

|-
| 03:18
|Next line type '''break ''''

|-
| 03:20
| Then'''case 4 '''''colon''

|-
| 03:24
|Next line '''dName '''''equal to within double quotes''''' Thursday ''''' then semicolon''

|-
| 03:32
| Then'''break '''

|-
| 03:24
| Then next line type'''case 5 '''''colon''

|-
| 03:37
| '''dName '''''equal to within double quotes''''' Friday '''''then semicolon''

|-
| 03:41
| Then'''break '''
|-
| 03:43
|Then ''' case 6 '''''colon''

|-
| 03:47
|Next line type '''dName '''''equal to within double quotes''''' Saturday ''''' then semicolon''

|-
| 03:55
|Then type '''break ''' semicolon

|-
| 03:59
| Then close the brackets.

|-
| 04:03
| now Let us add a print statement and see the code in action.

|-
| 04:07
| So next line Type '''System '''''dot '''''out '''''dot '''''println '''''within brackets '''''dName ''''' then semicolon.''

|-
| 04:16
| Now '''Save''' and run the file.

|-
| 04:20
| Now press Ctrl S and Ctrl F11 keys

|-
| 04:25
| we get the output as '''Wednesday'''which is corresponding to the case '''3.'''

|-
| 04:31
| Now Let us change the value of the day and see the result

|-
| 04:35
| SoChange '''3''' to '''0'''

|-
| 04:38
| NowSave and Run tht file

|-
| 04:40
| As we can see, the output is '''Sunday''' corresponding to the case '''0'''

|-
| 04:46
| Now what if there is no case corresponding to the value. So Let us see that

|-
| 04 :52
| change day equal to -1 Save and run the file

|-
| 04:58
| As we can see, there is no output.

|-
| 05:01
| But it would be better if we could have a case for all other values.

|-
| 05:06
| That is done by using the '''default''' keyword.

|-
| 05:09
|So After the last case, type

|-
| 05:12
| '''default '''''colon''

|-
| 05:14
|Next line '''dName '''''equal to within double quotes '''''Wrong Choice''''' then semicolon''

|-
| 05:24
|Next line '''break '''''semicolon''

|-
| 05:27
| We do not say '''case default''';

|-
| 05:30
| Note that we simply use the keyword '''default''' .

|-
| 05:34
| Now let us run the code. So save and run the file

|-
| 05:38
| As we can see, the default case is executed and the required message '''Wrong choice''' is printed.

|-
| 05:45
| Let us try with another random value.

|-
| 05:48
| Change '''-1''' to '''15'''

|-
| 05:51
| As we can see, again the default case is executed.

|-
| 05:57
| Now let us see what happens if we remove the break statement.

|-
| 06:01
| So Let us change '''day = 15''' to '''day = 4'''

|-
| 06:07
| remove the corresponding break statement for '''day =4'''

|-
| 06:12
| Now Save and run

|-
| 06:15
| Although the case is 4, we get the output as''' Friday''' and not '''Thursday.'''

|-
| 06:20
| because of the way switch case works.

|-
| 06:24
| First the value of day is compared with 0.

|-
| 06:29
| Then with 1 then with 2 and so on with all the possible cases.

|-
| 06:34
| When a match is found, it executes all the case from the match onwards.

|-
| 06:42
| In our case, it executed case 5 after case 4 .

|-
| 06:47
| Then it stops because of the break statement in case 5.

|-
| 06:53
|To avoid that, we need to add a '''break''' statement in each case.

|-
| 06:57
| | Let us now add the break statement we have removed.

|-
| 07:00
| So type ''' break '''''semicolon.''

|-
| 07:05
| Now let us run the code.

|-
| 07:08
| As we can see, now only '''case 4''' is executed.

|-
| 07:13
| As a rule, remember to use a '''break''' statement in every case to avoid errors.

|-
| 07:20
| We have come to the end of this tutorial.

|-
| 07:22
| In this tutorial we have learnt how to '''use switch case construct''' and '''how to use break statement.'''

|-
| 07:30
| As an assignemet write a program that has a name and gender as a variable Use a switch case statement that prints “Hello Mr....” for males and “Hello Ms...” for females.

|-
| 07:44
| To know more about the '''Spoken Tutorial''' project, watch the video available at the following link, it summarises the spoken-tutorial project.
|-
| 07:53
| If you do not have good bandwidth you can download and watch it.

|-
| 07:58
| The Spoken Tutorial Project Team. Conducts workshops using '''spoken tutorials''' and gives certificates for those who pass an online test.

|-
| 08:06
| For more details, please write to '''contact AT spoken HYPHEN tutorial DOT org.'''

|-
| 08:12
| '''Spoken Tutorial '''Project is a part of the '''Talk to a Teacher''' project and it is supported by the
|-
| 08:17
| '''National Mission on Education through ICT, MHRD, Government of India.

|-
| 08:22
| '''More information on this Mission is available at '''spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro'''

|-
| 08:31
| | This tutorial has been contributed by '''TalentSprint'''. Thanks for joining.

|}

@@ Line 169: / Line 169: @@
 |-
-| 03:24
+| 03:34
 | Then next line, type: '''case 5''' colon.

@@ Line 93: / Line 93: @@
 |-
 |  02:01
-| '''case 0''' colon
+| '''case 0''' colon.
 |-

@@ Line 14: / Line 14: @@
 |-
 |  00:11
-|  For this tutorial, we are using
+|  For this tutorial, we are using '''Ubuntu v 11.10''', '''JDK 1.6''' and  '''Eclipse 3.7.0'''
-* '''Ubuntu v 11.10'''
-* '''JDK 1.6''' and
-* '''Eclipse 3.7.0'''
 |-
@@ Line 40: / Line 37: @@
 |-
-|   00:47
+|  00:47
-|   I already have '''Eclipse''' opened.
+| I already have '''Eclipse''' opened.
 |-
@@ Line 72: / Line 69: @@
 |-
-|  01:34
+| 01:34
 |  '''day''' stores the day number.
@@ Line 203: / Line 200: @@
 |-
-|   04:07
+| 04:07
 | So, next line, type: '''System ''' dot '''out''' dot '''println''' within brackets '''dName'''  then semicolon.
@@ Line 239: / Line 236: @@
 |-
-| 04 :52
+| 04:52
 | Change '''day''' equal to '''-1''' '''Save''' and '''run''' the file.
@@ Line 348: / Line 345: @@
 |-
 | 06:57
-|  | Let us now add the '''break''' statement we have removed.
+|Let us now add the '''break''' statement we have removed.
 |-
@@ Line 406: / Line 403: @@
 |-
 |  08:31
-|  | This tutorial has been contributed by '''TalentSprint'''. Thanks for joining.
+|  This tutorial has been contributed by '''TalentSprint'''. Thanks for joining.
 |}

@@ Line 29: / Line 29: @@
 |-
 |  00:32
-|  A '''switch case''' is used to perform actions based on the value of a variable.
+| '''switch case''': The '''switch case''' is used to perform actions based on the value of a variable.
 |-
 |  00:39
-| Here is the syntax for a '''switch case statement'''.
+| Here is the syntax for a '''switch case''' statement.
 |-
@@ Line 49: / Line 49: @@
 |-
 |  00:53
-| Now Let us add some variables.
+| Now, let us add some variables.
 |-
 |  00:57
-|  Inside the '''main method''', we will create a variable '''day''' of '''type''' '''int'''.
+|  Inside the '''main method''', we will create a variable '''day''' of type '''int'''.
 |-
 |  01:02
-| So, type inside the '''main method''' '''int day''' and we can give it a value equal to '''3''' semi-colon.
+| So, type inside the '''main method''' '''int day''' and we can give it a value equal to '''3''' semicolon.
 |-
@@ Line 69: / Line 69: @@
 |-
 | 01:25
-| Here, '''dName''' is a '''variable''' to hold the names of the days of a week.
+| Here, '''dName''' is a '''variable''' to hold the name of the days of a week.
 |-
@@ Line 101: / Line 101: @@
 |-
 |  02:14
-| Then type: Next line '''break'''
+| Then type: Next line '''break;'''
 |-
@@ Line 129: / Line 129: @@
 |-
 | 02:50
-| Next line, '''dName''' equal to within double quotes '''Monday'''  semicolon
+| Next line, '''dName''' equal to within double quotes '''Monday'''  semicolon.
 |-
 | 02:56
-| Next line, type '''break'''
+| Next line, type '''break;'''
 |-
 | 02:58
-|Then type: '''case 2''' colon
+|Then type: '''case 2''' colon.
 |-
 | 03:01
-|Next line, '''dName''' equal to ''' Tuesday''' then semicolon
+|Next line, '''dName''' equal to ''' Tuesday''' then semicolon.
 |-
 | 03:06
-| Next line, type '''break'''
+| Next line, type '''break;'''
 |-
 | 03:08
-| Then next line, '''case 3''' colon
+| Then next line, '''case 3''' colon.
 |-
@@ Line 157: / Line 157: @@
 |-
 | 03:18
-|Next line, type '''break'''
+|Next line, type '''break;'''
 |-
 | 03:20
-|  Then '''case 4''' colon
+|  Then '''case 4''' colon.
 |-
 | 03:24
-|Next line, '''dName''' equal to within double quotes '''Thursday''' then semicolon
+|Next line, '''dName''' equal to within double quotes '''Thursday''' then semicolon.
 |-
@@ Line 173: / Line 173: @@
 |-
 | 03:24
-| Then next line, type: '''case 5''' colon
+| Then next line, type: '''case 5''' colon.
 |-
@@ Line 184: / Line 184: @@
 |-
 | 03:43
-|Then '''case 6''' colon
+|Then '''case 6''' colon.
 |-
 | 03:47
-|Next line, type: '''dName''' equal to within double quotes '''Saturday'''  then semicolon
+|Next line, type: '''dName''' equal to within double quotes '''Saturday'''  then semicolon.
 |-
@@ Line 200: / Line 200: @@
 |-
 | 04:03
-| Now Let us add a print statement and see the code in action.
+| Now, let us add a print statement and see the code in action.
 |-
@@ Line 220: / Line 220: @@
 |-
 |  04:31
-| Now Let us change the value of the  day and see the result.
+| Now, let us change the value of the  day and see the result.
 |-
@@ Line 260: / Line 260: @@
 |-
 |  05:12
-| '''default ''' colon
+| '''default ''' colon.
 |-
 | 05:14
-|Next line, '''dName''' equal to within double quotes '''Wrong Choice''' then semicolon
+|Next line, '''dName''' equal to within double quotes '''Wrong Choice''' then semicolon.
 |-
 | 05:24
-|Next line, '''break ''' semicolon
+|Next line, '''break ''' semicolon.
 |-
@@ Line 312: / Line 312: @@
 |-
 |  06:12
-|  Now '''Save''' and '''run'''.
+|  Now '''Save''' and '''run''' the file.
 |-
@@ Line 320: / Line 320: @@
 |-
 |  06:20
-|   because of the way '''switch case''' works.
+|  This is because of the way '''switch case''' works.
 |-
 |  06:24
-| First the value of '''day''' is compared with 0.
+| First, the value of '''day''' is compared with 0.
 |-
@@ Line 372: / Line 372: @@
 |-
 |  07:22
-| In this tutorial, we have learnt how to use '''switch case construct''' and how to use '''break statement.'''
+| In this tutorial, we have learnt how to use '''switch case construct''' and how to use '''break''' statement.
 |-
@@ Line 383: / Line 383: @@
 |-
 |  07:53
-| If you do not have good bandwidth,   you can download and watch it.
+| If you do not have good bandwidth, you can download and watch it.
 |-
 |  07:58
-|  The Spoken Tutorial Project Team. Conducts workshops using spoken tutorials and gives certificates for those who pass an online test.
+|  The Spoken Tutorial Project team: Conducts workshops using spoken tutorials and gives certificates to those who pass an online test.
 |-

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