Jyotisolanki at 05:02, 9 July 2014

2014-07-09T05:02:43Z

Krupali at 10:18, 14 August 2013

2013-08-14T10:18:59Z

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Krupali at 07:21, 14 August 2013

2013-08-14T07:21:58Z

Jyotisolanki at 06:59, 25 July 2013

2013-07-25T06:59:00Z

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Jyotisolanki: Created page with '{| border=1 || '''Time''' || '''Narration''' |- | 00:01 | Welcome to the tutorial on '''Errors and Debugging using Eclipse.''' |- | 00:07 | In this tutorial,we are going to…'

2013-07-23T01:14:34Z

Created page with '{| border=1 || '''Time''' || '''Narration''' |- | 00:01 | Welcome to the tutorial on '''Errors and Debugging using Eclipse.''' |- | 00:07 | In this tutorial,we are going to…'

New page

{| border=1
|| '''Time'''
|| '''Narration'''
|-
| 00:01
| Welcome to the tutorial on '''Errors and Debugging using Eclipse.'''

|-
| 00:07
| In this tutorial,we are going to learn

|-
| 00:10
|what are the possible error while writing a simple '''Java '''Program,

|-
| 00:14
|how to identify those errors and rectify them using eclipse.

|-
| 00:20
| For this tutorial we are using

Ubuntu 11.10 and

Eclipse 3.7

|-
| 00:27
| To follow this tutorial you must know

|-
| 00:30
|how to create and run a '''Java Program '''in '''Eclipse.'''

|-
| 00:33
|If not, for relevant tutorial please visit our website as shown [http://spoken-tuitorial.org/ ][http://spoken-tuitorial.org/ http][http://spoken-tuitorial.org/ ://][http://spoken-tuitorial.org/ spoken][http://spoken-tuitorial.org/ -][http://spoken-tuitorial.org/ tuitorial][http://spoken-tuitorial.org/ .][http://spoken-tuitorial.org/ org]

|-
| 00:41
| In a simple '''Java program''', the typical errors could be.

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| 00:45
| Missing semicolon(;)
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| 00:47
| Missing double quotes(" ") around the message
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| 00:50
| Mis-match of filename and classname and
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| 00:52
|And Typing the print statement in lower-case

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| 00:55
|We shall write a program and then make each of these errors and see what happens in '''Eclipse'''

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| 01:04
| Here we have the Eclipse IDE and the project used for the''' HelloWorld''' tutorial

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| 01:11
|We shall create a new class in the project and use it '''New''' Class'''. Let us name the class ''' Error Free''' and select methods stubs '''public static Void main'''

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| 01:37
| Let us minimise the package explorer. Remove the comments and add the print statement to the few errors

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| 02:23
| In '''Eclipse''', the line which has the error will be indicated with a '''red cross mark '''on the left margin.

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| 02:35
|In this case, the '''System.out.println ''' line has an errors and hence their is the '''red cross mark''' on the left.

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| 02:44
| The list of errors is displayed by hovering the mouse over the '''cross mark.'''

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| 02:51
| The first error displayed is syntax error insert semi-colon to complete block statements
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| 02:58
|This is because we have to end every statement of a program with a semicolon.

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| 03:03
| So, let us insert ''semicolon'' at the end of the statement.

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| 03:08
|'''Save''' the file with '''Ctrl''' '''s'''.

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| 03:16
| notice that once we add the semi-colon and save the file, the first error is gone.

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| 03:21
| | their is only one error now which says;''' hello world cannot be resolved to a variable, which means to display any message on the console the message has to be included in double quotes.

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| 03:37
|Without the quotes, Java thinks that '''HelloWorld '''is the name of a variable.

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| 03:41
| Let us add double quotes before and after the message,

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| 03:55
|''' Ctrl''' s''' to '''Save'''. We see that the red cross mark have gone an d the program is error free. So let us ''' run''' the program and see what happens.

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| 04:10
| Run as '''Java applications''

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| 04:15
| We see that the message has been printed on the console.

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| 04:22
| Let us look at the next error.

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| 04:25
|It happens due to a mismatch of '''file name''' and '''class name.'''

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| 04:29
|It does not happens usually on '''Eclipse.'''

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| 04:31
|This is because we use the New Class wizard to create a file and eclipse

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| 04:39
|creates a file automatically

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| 04:41
| But if we create a '''Java file''' outside of '''Eclipse''' and add it to a project, their is the chance of the error

|-
| 04:47
|So let us stimulate the error , by changing the class name.

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| 04:59
| Since Java is case-sensitive, now the class name and file name do not match .

|-
| 05:09
| Notice that , there is a '''red cross mark '''on the left margin.

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| 05:14
| And error message reads '''The public type errorfree must be defined in its own file.

I
|-
| 05:20
| | '''Also notice that the word '''errorfree'''is ''' underlined in red colour.

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| 05:29
| ''' Java offers intelligent fixes and we have 2 fixes available here

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| 05:35
| The first one is '''rename compilation unit to errorfree java'''
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| 05:39
| The second one is ''''rename the type to error'''.
|-
| 05:43
| The fix that we are looking to is the second one.And we see that once you rename the file the class back to errorfree the error here is missing.

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| 06:03
| The next error happens due to typing mistakes in the print statement.

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| 06:09
|Let us replace the capital '''S '''with a small '''s'''.

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| 06:15
| We notice that their is the ''' red-cross mark'''

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| 06:18
| And error message reads '''system cannot be resolved.'''

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| 06:23
|This means, Java is expecting a class or object or a variable by the name '''system.'''

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| 06:28
|But there is nothing like system object in the code.

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| 06:33
| So let us look at the possible fixes..

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| 06:39
| there are '''11 fixes ''' out of these, fix that we are looking for is the eighth option

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| 06:48
| '''Change to 'System' (java.lang)'''

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| 06:58
|You can see that once we change it to capital S the error is missing.
|-
| 07:06
| here is how you identify errors in Java using eclipse and rectify them
|-
| 07:15
| This brings us to the end of this tutorial.
|-
| 07:18
|In this tutorial we have seen
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| 07:20
|'''what are the typical errors while writing a Java program''' and

|-
| 07:23
|how to '''identify them and rectify them using Eclipse'''.

|-
| 07:30
| | As an assignment for this tutorial, find out the error in the code given below and fix them

|-
| 07:39
|To know more about the '''Spoken Tutorial''' project,

|-
| 07:42
| Watch the video available at the following link, It summarises the project.

|-
| 07:48
|If you do not have good bandwidth, you can download and watch it

|-
| 07:53
| The Spoken Tutorial Team conducts workshops using '''spoken tutorials'''.

|-
| 07:57
|Gives certificates for those who pass an online test. For more details, please write to '''contact AT spoken HYPHEN tutorial DOT org.'''

|-
| 08:07
| '''Spoken Tutorial '''Project is a part of the '''Talk to a Teacher''' project.

|-
| 08:11
|It is supported by the '''National Mission on Education through ICT, MHRD, Government of India. '''

|-
| 08:17
|More information on this Mission is available at '''spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro'''

|-
| 08:23
| This tutorial has been contributed by '''TalentSprint'''.

Thanks for joining.

|}

@@ Line 177: / Line 177: @@
 |-
 | 05:29
-| '''જાવા''' બુદ્ધિશાળી સુધારાઓની તક આપે છે અને આપણી પાસે અહીં '''2 સુધારાઓ''' ઉપલબ્ધ છે
+|  '''એક્લીપ્સ'''  બુદ્ધિશાળી સુધારાઓની તક આપે છે અને આપણી પાસે અહીં '''2 સુધારાઓ''' ઉપલબ્ધ છે
 |-

@@ Line 9: / Line 9: @@
 |-
 | 00:07
-| આ ટ્યુટોરીયલમાં, આપણે શીખવાં જઈ રહ્યા છીએ
+| આ ટ્યુટોરીયલમાં, આપણે શીખીશું,
 |-
 | 00:10
-| સાદુ '''જાવા''' પ્રોગ્રામ લખતી વખતે શક્ય એરર શું છે,
+| સરળ '''જાવા''' પ્રોગ્રામ લખતી વખતે શક્ય એરર કઈ છે,
 |-
 | 00:14
-| કેવી રીતે તે એરરોને ઓળખવા અને '''એક્લીપ્સ''' નાં ઉપયોગથી સુધારવાં.
+| એરરોને કેવી રીતે ઓળખવું અને '''એક્લીપ્સ''' નાં ઉપયોગથી સુધારવાં.
 |-

Java/C2/Errors-and-Debugging-in-Eclipse/Gujarati - Revision history

Jyotisolanki at 05:02, 9 July 2014

Krupali at 10:18, 14 August 2013

Krupali at 07:21, 14 August 2013

Jyotisolanki at 06:59, 25 July 2013

Jyotisolanki: Created page with '{| border=1 || '''Time''' || '''Narration''' |- | 00:01 | Welcome to the tutorial on '''Errors and Debugging using Eclipse.''' |- | 00:07 | In this tutorial,we are going to…'