P17 - Class and Object in Java | Core Java |
In this video, I have explained about "Class and Object in Java".
Video Timeline:
00:00 Introduction
00:08 What is a class?
04:27 What is an Object?
10:08 summary
⭐⭐ What Is a Class?
A class is a blueprint or prototype from which objects are created.
⭐⭐ What Is an Object?
An object is a software bundle of related state and behavior. Software objects are often used to model the real-world objects that you find in everyday life.
Syntax:
ClassName variableName = new Constructor;
Examples:
Point originOne = new Point(23, 94);
Rectangle rectOne = new Rectangle(originOne, 100, 200);
Rectangle rectTwo = new Rectangle(50, 100);
The first line creates an object of the Point class, and the second and third lines each create an object of the Rectangle class.
Each of these statements has three parts (discussed in detail below):
Declaration: The code set in bold are all variable declarations that associate a variable name with an object type.
Instantiation: The new keyword is a Java operator that creates the object.
Initialization: The new operator is followed by a call to a constructor, which initializes the new object.
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Java programming by Yadagiri Reddy
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