Java Object and Classes
This lesson mainly focused on Java object and class and describes the features of Java object-oriented programming
.Java has following OOPS features:
In this lesson our major focus on Objects and Classes.
What is Object?
In real-world an entity that has state and its behavior is known as an object.
For Example:
In real-world object and software object have conceptually similar characteristics. In terms of object-oriented programming, software objects also have a state and behavior.
What is a class?
The primary purpose of a class is to hold data/information. This is achieved with attributes which are also known as data members.
The member functions determine the behavior of the class i.e. provide a definition for supporting various operations on data held in form of an object.
Defining a Class in Java
Syntax:
public class class_name
{
Data Members;
Methods;
}
Example:
public class Car
{
public:
double color; // Color of a car
double model; // Model of a car
}
Class Members
Data and functions are members.
Data Members and methods must be declared within the class definition.
Example:
public class Cube
{
int length; // length is a data member of class Cube
int breadth; // breadth is a data member of class Cube
int length ; // Error redefinition of length
}
Comments
Post a Comment