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Want to master OOP Java concepts easily? In this video, you will learn class and objects in Java with simple real-world examples perfect for beginners. This tutorial is designed for students and developers who want to understand java oop from scratch in an easy and practical way.
📘 Topics Covered:
✔️ Introduction to oop java
✔️ What is a class in Java
✔️ What are objects in Java
✔️ Class and objects in Java explained with examples
✔️ Real-time coding demonstration
✔️ Beginner-friendly java oop concepts
✔️ Tips for java oop projects for beginners
✔️ Part of our oop in java full course series
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0:01
Hi friends, welcome to tutors funny
0:03
channel. Today I'm bring the video of WP
0:07
with you. So I'm going to explain the
0:10
double OP it is a very must for
0:14
programming. Those who are interesting
0:15
in programming WP is very must. Okay. If
0:18
you are not understand WP you you cannot
0:23
be a program. Okay. So you must study
0:26
WP.
0:28
So today's our first class we are
0:29
discuss about the develop in Java class
0:33
and object. Okay. What is class? It is
0:38
nothing but
0:41
just a blueprint. It is nothing. It is
0:44
just a blueprint. Okay. So it define
0:47
variable and methods. Okay. Variable is
0:50
nothing but a data. Method is nothing
0:52
but a function and action. Okay. If
0:56
you're having a data the data how to
0:59
hack hack what is the action the action
1:03
which represent as a method okay data
1:07
which represent as a variable okay you
1:10
have to understand clearly these are the
1:12
concept is very uh very crucial things
1:16
okay when you are become a programmer
1:17
very crucial things right okay so first
1:21
we have to look at the example of car
1:23
car can be container color, brand,
1:26
speed. Okay, these are the called as
1:30
data.
1:32
Okay, car which has attributes. What are
1:35
the attributes? We have car. We can call
1:38
we can tell them car which is a name.
1:40
Car has a color, it should have a color,
1:42
it should have a brand, it should have a
1:43
speed. It's called as a car attributes.
1:46
What is the behavior of the car? Car
1:48
which has a start. We can start the car
1:51
and we can drive the car. These are the
1:53
called as a method. Okay. So this is
1:56
this is a variable. This is a these are
2:00
called as a variables. This is called as
2:02
this is known as a method. This is known
2:05
as a variable. This is known as a
2:07
method. You have to understand the
2:09
clearly this concept. What's the
2:11
difference between variable and methods.
2:15
Okay.
2:17
Okay. So objects and objects really
2:20
instance create from the class. instance
2:23
create from the class. Okay. So BMW car,
2:27
Toyota car, the both objects are created
2:31
from the car class. These are the
2:33
objects from the car class. Very simple
2:35
example. Okay. So this class so you can
2:38
see so you can see uh the real life
2:43
example class mobile phone design object
2:47
the Samsung phone. Okay. Mobile phone
2:51
design meets a common. Okay. Samsung
2:54
one of the brand. Okay. If it is a Sony
2:57
another brand called as objects. Okay.
3:00
We have to create the instance. After
3:02
that we are using from here. Okay. So we
3:05
can create the objects.
3:09
Okay. So here objects are objects are
3:11
real instance creating from the class.
3:13
Instance objects. Okay. You have to
3:15
create instance creating from the class.
3:17
We can use it the objects. Okay. Java
3:20
class and object you can create a class
3:21
for student it is this is a this is the
3:25
student class so how is the inform
3:27
coming from so we can do the practical
3:30
so you can easily understand so I'm
3:33
going to go to get the
3:35
net beats
3:38
okay if you not installed the net bits
3:40
is go to that uh
3:45
go to the Google and type net pins
3:49
nets and install them uh latest version
3:54
I can you can get it get okay
4:00
now what I'm going to do is I'm going to
4:02
this is your class so I'm going to go to
4:07
create the new project so go to that
4:12
file new project
4:16
So here I'm going to create a uh class.
4:20
So I'm going to go to the select here
4:24
Java and Java application. Click next
4:29
here. If it is a main class you have to
4:30
keep as it is you have to create
4:34
uh student
4:38
but name I'm going to create a
4:41
class
4:42
and object
4:47
this is my project
4:50
click finish
4:55
here class and object. Okay. So this is
4:58
so I'm going to this one. I'm going to
5:00
delete them.
5:02
At the moment we don't need them. I
5:04
remove them.
5:08
Now this is a package. This package I'm
5:09
going to create a class which is a
5:11
student.
5:16
Okay. This is a student. We don't need
5:18
don't bother. Sorry. This is a packages.
5:20
You don't delete the packages. Okay.
5:23
It's keep as it is. Okay. This package
5:25
which is nothing but this a package.
5:26
inside this packet we having a class
5:29
which is a
5:31
uh student okay it's nothing but a fold
5:35
okay so first what I did here is student
5:38
has a property student name and age so
5:42
name we have when you write the name it
5:45
belongs to the data type it is a string
5:48
string name understand
5:53
after that we have a H age which is
5:57
belongs to the database which is a data
5:59
type which is a int
6:05
which is nothing but a variables
6:09
declarations.
6:11
Okay. It is in WP hooks concept we have
6:14
to call as this one is a attributes or
6:18
data we have to there are many we can
6:23
call them as many names okay we can call
6:27
many ways like okay okay so after that
6:31
second one is this is a data we have a
6:35
action so the data how going to act so
6:39
it's nothing but a method
6:42
Okay. So what you're going to do is we
6:44
have to create the method which is a
6:47
white display
6:56
open and close bracket here. What you
7:00
here write here is we have to write it
7:03
here simply
7:06
system
7:09
dot outprint.
7:19
Okay. So here this name I'm going to put
7:21
it over here. Same thing I just copy it
7:25
and paste below this age.
7:29
Okay. So,
7:31
here is a data.
7:34
This data we have to print inside this
7:37
method. Okay. We have to uh Okay. This
7:41
is the thing simply you can understand
7:42
that this is the method. This is the
7:45
data. This is the method. Okay. This is
7:48
class which is a blueprint. Okay. Inside
7:51
the class we having a variables and
7:55
method. It is a class and objects. Okay,
7:58
this is a class. Now I'm going to create
8:01
the object. So object I'm going to
8:04
create it as a what is a you can create
8:07
another class which is a we can call as
8:09
this one as a main.
8:14
Okay. The main class it consist of a
8:17
main method. Okay. This is class your
8:20
consist of main method. Main method mean
8:22
this is the main method you have writing
8:24
here. What is the main method? You can
8:26
write this one
8:38
public static
8:42
but it's not it's a code
8:46
we can write it here simply public
8:50
static
8:52
write
8:55
string
8:58
a rgs array. Okay, so this is the main
9:02
method. Okay, this this here we are
9:06
program is storing and running. Okay,
9:08
this a main method. So how to call this
9:11
student class? First we have to create
9:13
the name of this class. What is the
9:17
class? Student.
9:21
You have to create the object which is a
9:24
one of student name. I can create here
9:28
uh John. Oh some John.
9:33
This a student equal new
9:36
student.
9:39
Whatever name student. This is the
9:42
called as object. This class we have to
9:45
access by
9:48
the same name. You have to call the same
9:50
name of the class name over here. Create
9:52
the object whatever you like. I just
9:54
create as this is all the student class.
9:56
So we have grade one of the student for
9:58
this class. I'm going to write your
10:01
grade whatever you can see here we
10:04
having a this object we have to call
10:08
John press enter here this two data is
10:13
coming data mean which is nothing but a
10:17
this two data string and name we having
10:20
a consist of that two we already we have
10:22
to
10:24
uh create the object which is John John
10:29
You have to select this name equal
10:33
John equal so that uh we can create this
10:36
student one. This is good one 61 mean
10:40
student one. We get the student name
10:42
John.
10:44
Okay. So the student has which has a
10:48
another one age
10:52
which is nothing but it belongs to
10:53
integer data type 21. This is this
10:57
simple
10:58
just simple after that we are call the
11:01
method st
11:03
one dot we have a method called st
11:06
that's it
11:08
now let's save all run the application
11:11
check what how the output will be
11:16
here
11:18
John and 21 will be displayed okay what
11:23
how how it will works
11:26
We have a name and age. So here the
11:29
second class main class what I did is
11:32
first we have to create the object of
11:33
this class. This class we having a two
11:36
data student and age here for name and
11:39
age. It is John is going to decide here.
11:42
Age is going to decide here age. Okay.
11:45
Or when you call the display method what
11:46
happen is it's come to here
11:51
going here at here what happen is what
11:56
is the name you are g given here
12:01
what's the name you are given here it's
12:04
command equal into here this class after
12:08
that when you display it is name should
12:12
be assigned to John and it is A will be
12:15
assigned to what? 21. When you call this
12:19
method, it has been written. This simple
12:22
way it is written. Okay,
12:26
got my point. Okay, simple way. Okay, so
12:32
the output will be display like this. We
12:35
create a class student. It's a variable.
12:39
So it's variables of that methods. So
12:44
objects object mean create a class name
12:47
object name st new mean memory of the
12:51
object mean when you create the object
12:52
you have to using the new keyword if you
12:54
are using the new keyword the program
12:57
will be understand the user going to
13:00
create the method so sorry object okay
13:04
so when you create the object you have
13:05
to implement the key keyword which is a
13:08
new okay when you create the object you
13:11
keep remember you have to using uh
13:15
keyword which is a new. Okay. When you
13:18
create the object your key remember you
13:20
have to use the uh keyword name use this
13:23
keyword you have to create that. Okay.
13:26
Simple.
13:28
Okay.
13:29
So
13:31
now this how we have run the practical.
13:33
So we having another practical also
13:35
here. Here the second one. So this one
13:40
having a card. So I simply just copy
13:43
this. I have to put into here instead of
13:46
show I meant to use it and explain.
13:48
Okay. Why this is not working.
13:52
Okay.
13:54
I can't paste it right now. Some problem
13:58
arising. So here it's working. I can't
14:01
paste it at the moment here.
14:08
So no problem. I I'm explaining. So the
14:11
same way what what we run the
14:15
programming as student okay the same
14:17
example here instead of the name and uh
14:21
age we have write string brand car brand
14:24
and car speed this is belongs to car
14:27
brand as string which belongs to the
14:29
data which is a speed it having a meth
14:33
method is show me method having a method
14:36
it's going to show method which is a so
14:37
method we have print we have print out
14:40
brand as well as a speed. Okay. So when
14:43
you uh where we write the main method,
14:49
so we have inside the public static
14:51
inside here what I did first you have to
14:53
create the uh class name. Okay. First
14:56
you have to write which is the class
14:57
name class name. After that we have to
14:59
using a new keyword and create the
15:00
object C1 C1 class one. Okay. Car one.
15:04
So carb one dot brand mean is brand BMW
15:09
speed 200 speed. This car with speed
15:13
dash speed 200. So this car which is car
15:17
two which is brand Toyota it belongs to
15:19
the brand Toyota and it uh the speed
15:22
belongs to 150. After that C1 C2 we have
15:26
to show the car statuses. Okay. So we
15:28
have to clear it BMW and Toyota has been
15:32
a simple answer. Okay.
15:36
Okay. So these are the questions always
15:39
the interview definition here the class
15:41
blueprint used to create the object. So
15:43
these are the things you must know
15:46
because the when you go to the Java
15:48
interviews so this is frequently asked
15:51
the questions. So I am also the
15:54
uh when you when I interviewing the
15:56
students so I mostly asking this
15:58
questions. Okay. This question is very
16:00
important stuff.
16:02
When you are a student or programmer you
16:05
must consider about concern about this
16:07
thing. This is very important stuff uh
16:09
when you become a programmer. Okay. So
16:11
this very good example this is you must
16:14
remember about this one. Okay. If you
16:16
not understand this well you cannot be a
16:20
programmer. Thanks for watching.
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