Java/C2/Hello-World-Program-in-Eclipse/English - Revision history

Sneha at 18:51, 7 May 2013

2013-05-07T18:51:20Z

Sneha at 16:59, 7 May 2013

2013-05-07T16:59:13Z

Sneha at 12:29, 7 May 2013

2013-05-07T12:29:45Z

Sneha at 08:15, 7 May 2013

2013-05-07T08:15:00Z

Chandrika: Created page with ''''Title of script''': HelloWorld in Java using Eclipse '''Author''': TalentSprint '''Keywords: '''HelloWorld, class, public, video tutorial {| style="border-spacing:0;" | s…'

2012-11-27T10:06:13Z

Created page with ''''Title of script''': HelloWorld in Java using Eclipse '''Author''': TalentSprint '''Keywords: '''HelloWorld, class, public, video tutorial {| style="border-spacing:0;" | s…'

New page

'''Title of script''': HelloWorld in Java using Eclipse

'''Author''': TalentSprint

'''Keywords: '''HelloWorld, class, public, video tutorial

{| style="border-spacing:0;"
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Visual Cue '''
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Description'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 1

'''Welcome'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| Welcome to the spoken tutorial on '''HelloWorld in Java on Eclipse'''.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 2

'''Learning Outcomes'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| In this tutorial, you will learn to write a simple program in '''Java '''using '''Eclipse.'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 3

'''Tools Used'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| For this tutorial we are using

Eclipse 3.7.0 and

Ubuntu 11.10

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 4

'''Pre-requisites'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| For this tutorial, you should have Eclipse installed on your system.

You should know how to create, save and run a file in Eclipse.

If not, for relevant tutorial please visit our website as shown.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 5

'''"HelloWorld"'''

System.out.println("Hello World");
| style="border:0.035cm solid #000000;padding:0.097cm;"| Here is the java program that prints the message '''Hello World'''

Let us try this program on '''Eclipse'''.

|-
| style="border:0.035cm solid #000000;padding:0.176cm;"| Minimize slides and launch Eclipse

'''Alt + F2 > eclipse'''
| style="border:0.035cm solid #000000;padding:0.176cm;"| Press '''Alt''' and '''F2''' and type eclipse in the dialog box and hit enter.

We see the Eclipse IDE.

|-
| style="border:0.035cm solid #000000;padding:0.176cm;"| Click on '''File > New > Project'''
| style="border:0.035cm solid #000000;padding:0.176cm;"| Now we will create a project.

So click on '''File menu,''' go to '''New '''option and click on '''Project '''option.

|-
| style="border:0.035cm solid #000000;padding:0.176cm;"| Select''' Java Project.'''

Click''' Next'''
| style="border:0.035cm solid #000000;padding:0.176cm;"| Select '''Java Project '''option in the list of '''Wizards''' and click '''Next.'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Type '''DemoProject'''

Click''' Finish'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| Type '''DemoProject '''(without spaces) in the project name.

Note that the '''D '''and '''P '''in the project name are in uppercase.

Click on '''Finish'''

|-
| style="border:0.035cm solid #000000;padding:0.176cm;"| Point to the '''Project Explorer portlet''' on the left.
| style="border:0.035cm solid #000000;padding:0.176cm;"| Now '''Right click''' on the '''DemoProject '''and go to '''New''' option and select '''Class'''

This opens a '''New Java Class Portlet'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Point to the '''New Java Class portlet'''

Point to the list of '''method stubs'''

Click''' Finish'''

| style="border:0.035cm solid #000000;padding:0.097cm;"| Type''' DemoClass''' (without spaces) in the '''Name '''field.

Note that the '''D '''and '''C''' in the class name are in upper case.

Select the '''public static void main''' option.

Then click on '''Finish''' at the bottom right corner of the wizardPrathamesh Salunke:

Also try to keep one activity in one row..

|-
| style="border:0.035cm solid #000000;padding:0.176cm;"| Point to the '''src''' directory in '''Project Explorer Portlet'''
| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Eclipse '''creates a file with the name called '''DemoClass.java''' .

It is in the '''src''' directory of our project.

In '''Java''', every class is a file.

So, the '''Class name''' and the '''File name''' must match.

In our case, class name is '''DemoClass''' and hence the file name will be '''DemoClass.java'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Point to the “code editor”

'''Type in Eclipse'''

After the line “public static void main”

'''System'''

'''System.out.println('''

'''System.out.println(“)'''

'''System.out.println(“HelloWorld”);'''

Press''' Ctrl + S'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| As we can see, Eclipse has filled most of the code in the program.

We will learn about all this once we get some output.

Let us type the print statement.

As we can see, '''Eclipse''' suggests various possibilities as we type a command.

Let us complete the command.

'''Eclipse''' also completes the parentheses by automatically adding the closing parentheses.

Let us add the statement that we want to print.

The message has to be included in double quotes.

As we can see, '''Eclipse''' also completes the quotes by adding the closing quote.

There is a semicolon at the end of the statement.

Every statement in Java must end with a semicolon.

Now our program is complete.

Save the file by pressing '''Ctrl + S''' simultaneously..

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Click on the code editor
| style="border:0.035cm solid #000000;padding:0.097cm;"| Now let us compile and execute the program.

Right click on the source code, go to '''Run as''' option, and then click '''java application.'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Point to output console at the botom of the code editor
| style="border:0.035cm solid #000000;padding:0.097cm;"| The output message '''HelloWorld''' is displayed in the console window.

So we have written a simple java program and executed it successfully.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Replace '''HelloWorld''' with '''Hello Java''' and run the code.
| style="border:0.035cm solid #000000;padding:0.097cm;"| Now, let us change the code to print a different message.

Replace '''HelloWorld''' with '''Hello Java''' and run the code.

As we can see, the message printed now is '''Hello Java'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Point to the line '''public class DemoProgram'''

Point to the line '''public static void...'''

Point to the''' opening and closing braces '''

Select from opening to closing braces of the class.

Select from opening to closing braces of the '''main''' method.
| style="border:0.035cm solid #000000;padding:0.097cm;"| Now let us understand the program piece by piece.

The line class '''DemoProgram''' indicates that the name of our class is '''DemoProgram'''.

This is required since every source file in java is a class.

The next line defines the '''main''' method.

It is the code inside '''main '''method that will be executed when you run a java program.

The opening and closing braces suggest which part of code goes under which name.

This block of code belongs to the '''DemoProgram''' class.

This block of code belongs to the '''main''' method.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Minimize the '''Eclipse''' window and switch to slides.

Slide 6

'''Summary'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| We have come to the end of this tutorial.

In this tutorial we have learnt how to write 'HelloWorld' program using Eclipse.

We have also understood what each piece of the program does.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 7'''Assignment'''

| style="border:0.035cm solid #000000;padding:0.097cm;"| Create a java class by the name '''Greet''' that prints '''Program Successful''' when executed.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 8'''About the Spoken Tutorial Project'''

* Watch the video available at[http://spoken-tutorial.org/What_is_a_Spoken_Tutorial ][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial http][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial ://][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial spoken][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial -][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial tutorial][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial .][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial org][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial /][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial What][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial is][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial a][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial Spoken][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial Tutorial]

* It summarises the Spoken Tutorial project

* If you do not have good bandwidth, you can download and watch it

| style="border:0.035cm solid #000000;padding:0.097cm;"| To know more about the '''Spoken Tutorial''' project, watch the video available at the following link, that summarises the project.Alternatively, you can download and watch it.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 9'''Spoken Tutorial Workshops'''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 [mailto:contact@spoken-tutorial.org contact][mailto:contact@spoken-tutorial.org @][mailto:contact@spoken-tutorial.org spoken][mailto:contact@spoken-tutorial.org -][mailto:contact@spoken-tutorial.org tutorial][mailto:contact@spoken-tutorial.org .][mailto:contact@spoken-tutorial.org org]

| style="border:0.035cm solid #000000;padding:0.097cm;"| 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.'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 10'''Acknowledgement'''

* Spoken Tutorial Project is a part of the Talk to a Teacher project

* It is supported by the National Mission on Education through ICT, MHRD, Government of India

* More information on this Mission is available at

[http://spoken-tutorial.org/NMEICT-Intro http][http://spoken-tutorial.org/NMEICT-Intro ://][http://spoken-tutorial.org/NMEICT-Intro spoken][http://spoken-tutorial.org/NMEICT-Intro -][http://spoken-tutorial.org/NMEICT-Intro tutorial][http://spoken-tutorial.org/NMEICT-Intro .][http://spoken-tutorial.org/NMEICT-Intro org][http://spoken-tutorial.org/NMEICT-Intro /][http://spoken-tutorial.org/NMEICT-Intro NMEICT][http://spoken-tutorial.org/NMEICT-Intro -][http://spoken-tutorial.org/NMEICT-Intro Intro]
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Spoken Tutorial '''Project is a part of the '''Talk to a Teacher''' project.

It is supported by the '''National Mission on Education through ICT, MHRD, Government of India.'''

More information on this Mission is available at '''spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 11'''About the contributor'''

* This tutorial has been contributed by '''TalentSprint'''
* '''www.talentsprint.com'''

* Thanks for joining

| style="border:0.035cm solid #000000;padding:0.097cm;"| This tutorial has been contributed by '''TalentSprint'''.

Thanks for joining.

|}

@@ Line 116: / Line 116: @@
-| style="border:0.035cm solid #000000;padding:0.097cm;"|  In the class name  type '''DemoProgram''' and in the method stuff select one that says''' Public, Static,Void main'''. Click Finish at the bottom right corner of the wizard.
+| style="border:0.035cm solid #000000;padding:0.097cm;"|  In the class name  type '''DemoProgram''' and in the method stubs select one that says''' Public, Static,Void main'''. Click Finish at the bottom right corner of the wizard.
@@ Line 122: / Line 122: @@
 |-
 | style="border:0.035cm solid #000000;padding:0.176cm;"| Point to the '''src''' directory in '''Project Explorer Portlet'''
-| style="border:0.035cm solid #000000;padding:0.176cm;"| '''Eclipse '''creates a file with the name called '''DemoClass.java''' .
+| style="border:0.035cm solid #000000;padding:0.176cm;"|  We can see that the''' DemoProject has the source directory and the Demo program.Java, This is because every class in Java has to be in its own file. Hence the class Demo Program can exit only in the file ''' Demo program. Java'''
 |-
@@ Line 158: / Line 147: @@
 Press''' Ctrl + S'''
-| style="border:0.035cm solid #000000;padding:0.097cm;"| As we can see, Eclipse has filled most of the code in the program.
+| style="border:0.035cm solid #000000;padding:0.097cm;"| We  can see that their is very little space for editor  and the view looks blurred er  Let us minimise thr other portiere and here we have the editor .
+Notice that this line begins with two slashes which means this line is the comment and has nothing to do with our code.
+Let us remove this line. Similarly every thing that is in between slash, Astrix   and Mastic slash is also accompanied.
 We will learn about all this once we get some output.

← Older revision		Revision as of 16:59, 7 May 2013
Line 40:		Line 40:


−	and You must know how to create, save and run a file in Eclipse.	+	and You must know how to create, save and run a file on Eclipse.

@@ Line 15: / Line 15: @@
 '''Welcome'''
-| style="border:0.035cm solid #000000;padding:0.097cm;"| Welcome to the spoken tutorial on '''HelloWorld in Java on Eclipse'''.
+| style="border:0.035cm solid #000000;padding:0.097cm;"| Welcome to the spoken tutorial on '''HelloWorld in Java using Eclipse'''.
 |-
@@ Line 21: / Line 21: @@
 '''Learning Outcomes'''
-| style="border:0.035cm solid #000000;padding:0.097cm;"| In this tutorial, we are  going to  learn how  to write a simple helloWorldin '''Java '''using '''Eclipse.'''
+| style="border:0.035cm solid #000000;padding:0.097cm;"| In this tutorial, we are  going to  learn how  to write a simple helloWorld program in '''Java '''using '''Eclipse.'''
 |-
@@ Line 55: / Line 55: @@
-  Now Let us try   on '''Eclipse'''.
+  Now Let us try it  on '''Eclipse'''.
 |-
@@ Line 61: / Line 61: @@
 '''Alt + F2 > eclipse'''
-| style="border:0.035cm solid #000000;padding:0.176cm;"| Press '''Alt''' and '''F2''' and in the dialog box type eclipse  and hit enter. Click Ok to Workspace
+| style="border:0.035cm solid #000000;padding:0.176cm;"| Press '''Alt''' and '''F2''' and in the dialog box type eclipse  and hit enter. Click Ok at the  Workspace
-And here we have Eclipse IDE.
+And here we have  the Eclipse IDE.
 |-
@@ Line 98: / Line 98: @@
 |-
 | style="border:0.035cm solid #000000;padding:0.176cm;"| Point to the '''Project Explorer portlet''' on the left.
-| style="border:0.035cm solid #000000;padding:0.176cm;"|Now let us add a new class  to the project.  '''Right click''' on the ''' Project '''   '''New'''  and select '''Class'''. In the class name  type '''DemoProgram''' and in the method stuff select one that says''' Public, Static,Void main'''
+| style="border:0.035cm solid #000000;padding:0.176cm;"|Now let us add a new class  to the project.  '''Right click''' on the ''' Project '''   '''New'''  select '''Class'''.
-Click Finish at the bottom right corner of the wizard.
@@ Line 117: / Line 116: @@
-| style="border:0.035cm solid #000000;padding:0.097cm;"| Type''' DemoClass''' (without spaces) in the '''Name '''field.
+| style="border:0.035cm solid #000000;padding:0.097cm;"|  In the class name  type '''DemoProgram''' and in the method stuff select one that says''' Public, Static,Void main'''. Click Finish at the bottom right corner of the wizard.
-−
-−
-Note that the '''D '''and '''C''' in the class name are in upper case.
-−
-−
-Select the '''public static void main''' option.
-−
-−
-Then click on '''Finish''' at the bottom right corner of the wizardPrathamesh Salunke:
-−
-Also try to keep one activity in one row..
 |-
 | style="border:0.035cm solid #000000;padding:0.176cm;"| Point to the '''src''' directory in '''Project Explorer Portlet'''

@@ Line 21: / Line 21: @@
 '''Learning Outcomes'''
-| style="border:0.035cm solid #000000;padding:0.097cm;"| In this tutorial, you will learn to write a simple program in '''Java '''using '''Eclipse.'''
+| style="border:0.035cm solid #000000;padding:0.097cm;"| In this tutorial, we are  going to  learn how  to write a simple helloWorldin '''Java '''using '''Eclipse.'''
 |-
@@ Line 37: / Line 37: @@
 '''Pre-requisites'''
-| style="border:0.035cm solid #000000;padding:0.097cm;"| For this tutorial, you should have Eclipse installed on your system.
+| style="border:0.035cm solid #000000;padding:0.097cm;"| To follow this tutorial you must have Eclipse installed on your system.
-You should know how to create, save and run a file in Eclipse.
+ and You  must know how to create, save and run a file in Eclipse.
@@ Line 52: / Line 52: @@
 System.out.println("Hello World");
-| style="border:0.035cm solid #000000;padding:0.097cm;"| Here is the java program that prints the message '''Hello World'''
+| style="border:0.035cm solid #000000;padding:0.097cm;"| Here is a line java code that prints the message '''Hello World'''
-Let us try this program on '''Eclipse'''.
+ Now Let us try   on '''Eclipse'''.
 |-
@@ Line 61: / Line 61: @@
 '''Alt + F2 > eclipse'''
-| style="border:0.035cm solid #000000;padding:0.176cm;"| Press '''Alt''' and '''F2''' and type eclipse in the dialog box and hit enter.
+| style="border:0.035cm solid #000000;padding:0.176cm;"| Press '''Alt''' and '''F2''' and in the dialog box type eclipse  and hit enter. Click Ok to Workspace
-We see the Eclipse IDE.
+And here we have Eclipse IDE.
 |-
 | style="border:0.035cm solid #000000;padding:0.176cm;"| Click on '''File > New > Project'''
-| style="border:0.035cm solid #000000;padding:0.176cm;"| Now we will create a project.
+| style="border:0.035cm solid #000000;padding:0.176cm;"|Now let us add a new project
-So click on '''File menu,''' go to '''New '''option and click on '''Project '''option.
+  click  '''File '''   '''New '''  and select '''Project '''
 |-
@@ Line 78: / Line 78: @@
 Click''' Next'''
-| style="border:0.035cm solid #000000;padding:0.176cm;"| Select '''Java Project '''option in the list of '''Wizards''' and click '''Next.'''
+| style="border:0.035cm solid #000000;padding:0.176cm;"|In the list of project Select '''Java Project '''and click'''Next.'''
@@ Line 84: / Line 84: @@
 |-
-| style="border:0.035cm solid #000000;padding:0.097cm;"| Type '''DemoProject'''
+| style="border:0.035cm solid #000000;padding:0.097cm;"|In the project name  Type '''DemoProject'''
 Click''' Finish'''
-| style="border:0.035cm solid #000000;padding:0.097cm;"| Type '''DemoProject '''(without spaces) in the project name.
+| style="border:0.035cm solid #000000;padding:0.097cm;"|In the project name  Type '''DemoProject'''
+Click  '''Finish''' at the bottom right corner of the wizards. The '''DemoProject''' has been created
-Click on '''Finish'''
 |-
 | style="border:0.035cm solid #000000;padding:0.176cm;"| Point to the '''Project Explorer portlet''' on the left.
-| style="border:0.035cm solid #000000;padding:0.176cm;"| Now '''Right click''' on the '''DemoProject '''and go to '''New''' option and select '''Class'''
+| style="border:0.035cm solid #000000;padding:0.176cm;"|Now let us add a new class  to the project.  '''Right click''' on the ''' Project '''   '''New'''  and select '''Class'''. In the class name  type '''DemoProgram''' and in the method stuff select one that says''' Public, Static,Void main'''
+Click Finish at the bottom right corner of the wizard.
-−
 This opens a '''New Java Class Portlet'''