Java/C2/Creating-class/English-timed

Time'	Narration
00:02	Welcome to the spoken tutorial on Creating Classes
00:05	In this tutorial, we will learn about
00:08	A class in real world
00:10	A class in Java
00:12	Structure of a Java class
00:14	Syntax for a Java class
00:16	And A simple example of Java class
00:19	Here we are using Ubuntu version 11.10 JDK 1.6 and Eclipse 3.7.0
00:30	To follow this tutorial you must know how to write, compile and run a simple Java program in Eclipse.
00:37	If not, please see the spoken-tutorial on these topics available at spoken-tutorial.org.
00:46	Now let us see what is a class in real world.
00:50	Whatever we can see in this world are all objects.
00:54	And All the objects can be categorized into special groups.
00:59	Each group is termed as a class.
01:02	For example human being is a class.
01:05	We are all different objects of this class.
01:08	We all have different properties like eyes, legs, hands etc.
01:13	Which are common to the human being class.
01:15	Seeing, eating, walking etc are behaviors that are common to the human being class.
01:22	Now let us see what is the class in Java?
01:26	A class is the blueprint from which individual objects are created.
01:31	Structure of a Java Class ; A class defines:
01:35	A set of properties called variables
01:37	And A set of behaviors called methods.
01:40	Now, let us see the syntax for declaring classes
01:44	modifier – class -classname within curly brackets variable, constructor and method declarations.
01:52	We will learn about these in detail in the coming tutorials.
01:58	Now let us create a simple class using Eclipse.
02:03	I have already opened Eclipse.
02:09	Now let us create a Project.
02:11	So click on File, go to New and click on Java Project.
02:20	In the New Project Wizard, enter the Project name as ClassDemo with C and D in capital.
02:34	Then click on Finish.
02:38	We see that the Project ClassDemo is created.
02:43	We will now create a Java class name Student.
02:47	So right click on ClassDemo, go to New and click on Class.
02:56	In the New Java Class wizard type the Name as Student.
03:03	We can see that the modifier here is public.
03:07	This shows that the class is visible to all the classes everywhere.
03:11	If a class has no modifier which is the default , it is visible only within its own package.
03:18	We will learn about packages in the later tutorials.
03:23	Here I have selected public.
03:26	In the method stubs select public static void main.
03:31	Then click on Finish.
03:36	We can see that the class named Student is created.
03:40	Now, let me remove the comments.
03:51	A Student class can contain properties like Name, Roll Number, Marks etc.
03:57	So inside this class Student let me declare two variables Roll Number and Name.
04:04	So, I will type int roll underscore number semicolon.
04:14	String name semicolon.
04:19	So I have declared two variables.
04:22	Now a class also contains methods.
04:25	So let me create a method named StudentDetail.
04:30	This method will give the detail of each student.
04:34	So let me type,' void studentDetail then opening and closing brackets, curly brackets open.
04:49	Now, this method will give the roll number and name of the Student.
04:53	So, type System dot out dot println within brackets and double quotes The roll number is we can type it as number is ; close the double quotes plus roll_number semicolon.
05:23	Next line type System dot out dot println within brackets and double quotes The name is plus name and semicolon.
05:40	Now, inside the main method we will type System dot out dot println within brackets and double quotes We have created a class with two variables and 1 method.
06:10	Thus We have created the class student.
06:20	Now let me, save the file by pressing Control and S keys simultaneously.
06:26	Let meRun the program by pressing Control and F11 keys simultaneously.
06:33	We get the output as :
06:34	We have created a class with 2 variables and 1 method
06:38	just as we had typed in the main method.
06:46	Thus we have successfully created a class.
06:50	So, in this tutorial we learnt about a class in java and how to create a class in java.
06:59	For self assessment create a class named Employee with variables emp underscore number and emp underscore name .
07:10	And Method printEmployee which displays the Employee information.
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08:04	Thus We come to the end of this tutorial.
08:07	This is Arya Ratish from IIT Bomaby signing off. Thanks for joining us.

Contributors and Content Editors

Gaurav, PoojaMoolya, Sandhya.np14, Sneha