Introduction to Classes and Objects Solved Examples in Java OOP in Urdu Hindi

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#Programming
Introduction to Classes and Objects Solved Examples in Java OOP in Urdu Hindi
In this lecture we will understand what is an object in java in Urdu Hindi. Then We will discuss what is class in Java in Urdu Hindi.
Java Class and Objects/Entity
Java is an object-oriented programming language. It is based on the concept of objects.
These objects share two characteristics:
• state (fields)
• behavior (methods)
For example,
1. Lamp is an object
State/Properties: on or off
Behavior/Methods: turn on or turn off
2. Bicycle is an object
States/Properties: current gear, two wheels, number of gear, etc.
Behavior/Methods: braking, accelerating, changing gears, etc.

Java Class
3. Before you create objects in Java, you need to define a class. A class is a blueprint for the object.
4. We can think of the class as a sketch (prototype) of a house. It contains all the details about the floors, doors, windows, etc. Based on these descriptions we build the house. House is the object.
5. Since many houses can be made from the same description, we can create many objects from a class.

How to define a class in Java?
Here's how we can define a class in Java:
class ClassName {
// variables/Pro/State
// methods
}
For example,
class Lamp {

// instance variable
private boolean isOn;

// method
public void turnOn() {
isOn = true;
}

// method
public void turnOff() {
isOn = false;
}
}
Java Objects
An object is called an instance of a class. For example, suppose Animal is a class then Cat, Dog, Horse, and so on can be considered as objects of Animal class.
Here is how we can create objects in Java:
className object = new className();
How to access members?
Objects are used to access members of the class. We can access members (call methods and access instance variables) by using the . operator.
While Loop in java with Example:
https://youtu.be/iHiUp8xFiWU
Watch If else if statement in java
https://www.youtube.com/watch?v=B1xm5lE_tdI&list=PLbIhkHxfUIItBvQFLLBQ931EvSFqK9tgA&index=14
School Management System Project in Java Netbeans
https://www.youtube.com/playlist?list=PLbIhkHxfUIIs_QM5x2z0IZhzlD7X0Y44-

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