Java/C2/Switch-Case/Gujarati - Revision history

PoojaMoolya at 06:03, 28 February 2017

2017-02-28T06:03:59Z

PoojaMoolya at 09:29, 29 December 2014

2014-12-29T09:29:22Z

Gaurav at 10:09, 15 July 2014

2014-07-15T10:09:40Z

Krupali at 09:13, 5 August 2013

2013-08-05T09:13:15Z

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Krupali at 07:43, 5 August 2013

2013-08-05T07:43:09Z

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Krupali at 07:01, 5 August 2013

2013-08-05T07:01:21Z

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Krupali: 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…'

2013-08-05T05:21:45Z

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 16: / Line 16: @@
 |  આ ટ્યુટોરીયલ માટે આપણે,
-* '''Ubuntu v 11.10'''
+'''Ubuntu v 11.10''',  '''JDK 1.6''' અને  '''Eclipse 3.7.0''' નો ઉપયોગ કરી રહ્યા છીએ.
-* '''JDK 1.6''' અને
-* '''Eclipse 3.7.0''' નો ઉપયોગ કરી રહ્યા છીએ.
 |-
@@ Line 74: / Line 72: @@
 |-
 |  01:34
-|  '''day''' '''દિવસ નમ્બર''' સંગ્રહે છે.
+| '''day''' '''દિવસ નમ્બર''' સંગ્રહે છે.
 |-
@@ Line 173: / Line 171: @@
 |-
-| 03:24
+| 03:34
 | પછી '''case 5 ''''' કોલન ટાઇપ કરો,
@@ Line 205: / Line 203: @@
 |-
-|   04:07
+| 04:07
-|  આગામી લાઇનમાં ટાઇપ કરો, '''System '''''dot '''''out '''''dot '''''println ''''' કૌંશ અંદર, '''dName ''' પછી સેમીકોલન.
+|આગામી લાઇનમાં ટાઇપ કરો, '''System '''''dot '''''out '''''dot '''''println ''''' કૌંશ અંદર, '''dName ''' પછી સેમીકોલન.
 |-
-|  04:16
+| 04:16
 |હવે ફાઈલ '''Save''' અને રન કરો.
 |-
-|  04:20
+| 04:20
 | હવે Ctrl S અને Ctrl F11 કીઓ ડબાઓ.
 |-
-|  04:25
+| 04:25
 | આપણને '''Wednesday''' આઉટપુટ મળ્યું છે, જે કેસ '''3''' અનુરૂપ છે.
 |-
-|  04:31
+| 04:31
 | હવે day ની વેલ્યુ બદલો અને પરિણામ જુઓ.
@@ Line 229: / Line 227: @@
 |-
-|  04:38
+| 04:38
 | હવે ફાઈલ સેવ અને રન કરો.
 |-
-|  04:40
+| 04:40
 | આપણે જોઈ શકીએ છીએ, આઉટપુટ '''0'''કેસ અનુરૂપ'''Sunday''' છે.
 |-
-|  04:46
+| 04:46
 | હવે શું થશે જો વેલ્યુને સંબંધિત કોઈ પણ કેસ ન હોય. ચાલો તે જોઈએ.
@@ Line 245: / Line 243: @@
 |-
-|  04:58
+| 04:58
 | આપણે જોઈ શકીએ છીએ, આઉટપુટ કઈ જ નથી.
 |-
-|  05:01
+| 05:01
 | પરંતુ તે વધુ સારું હશે જો આપણે બધી વેલ્યુ માટે કેસ રાખીએ.
 |-
-|  05:06
+| 05:06
 | તે '''default''' કીવર્ડનો ઉપયોગ કરી કરવામાં આવે છે.
 |-
-|   05:09
+| 05:09
 |તો છેલ્લા કેસ પછી, ટાઇપ કરો,
 |-
-|  05:12
+| 05:12
 | '''default ''''' કોલન''
@@ Line 273: / Line 271: @@
 |-
-|  05:27
+| 05:27
 | આપણે '''case default''' ન લખીશું,
 |-
-|  05:30
+| 05:30
 | નોંધ લો કે આપણે માત્ર '''default''' કીવર્ડનો ઉપયોગ કર્યો છે.
 |-
-|  05:34
+| 05:34
 | હવે કોડ રન કરીએ. તો ફાઈલ સેવ અને રન કરો.
 |-
-|  05:38
+| 05:38
 | આપણે જોઈ શકીએ છીએ, મૂળભૂત કેસ એક્ઝીક્યુટ કરવામાં આવેલ છે અને જરૂરી મેસેજ '''Wrong choice''' પ્રિન્ટ થયેલ છે.
 |-
-|  05:45
+| 05:45
 | ચાલો બીજી રેન્ડમ વેલ્યુ સાથે પ્રયત્ન કરીએ.
@@ Line 297: / Line 295: @@
 |-
-|  05:51
+| 05:51
 | આપણે જોઈ શકીએ છીએ, ફરી default કેસ એક્ઝીક્યુટ થયેલ છે.
@@ Line 309: / Line 307: @@
 |-
-|  06:07
+| 06:07
 |  '''day =4''' માટે અનુરૂપ break સ્ટેટમેન્ટ રદ કરો.
@@ Line 381: / Line 379: @@
 |-
-|   07:44
+| 07:44
 | સ્પોકન ટ્યુટોરીયલ પ્રોજેક્ટ વિષે વધુ જાણવા માટે,  નીચે આપેલ લીંક ઉપર ઉપલબ્ધ વિડીઓ જુઓ, તે સ્પોકન ટ્યુટોરીયલ પ્રોજેક્ટ માટે સારાંશ આપે છે.

@@ Line 241: / Line 241: @@
 |-
-| 04 :52
+| 04:52
 | day ઇકવલ ટુ -1 થી બદલો. ફાઈલ સેવ અને રન કરો.

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