Constructor is a special member method which will be called automatically when you create an object of any class.
The main purpose of using constructor is to initialize an object.
http://www.tutorial4us.com/java/java-constructor
Our trainer’s having vast experience in real time environment. If anyone has a dream for their career in software programming, then go for java because it is a popular route to establish and fulfill your dreams.
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oops concept in java | object oriented programming in javaCPD INDIA
object oriented programming is a key concept for the development of application in windows as well as web based application environment. oops concept maps real world through its concept of classes, objects, inheritance, polymorphism which help in making a robust application.
Constructor is a special member method which will be called automatically when you create an object of any class.
The main purpose of using constructor is to initialize an object.
http://www.tutorial4us.com/java/java-constructor
Our trainer’s having vast experience in real time environment. If anyone has a dream for their career in software programming, then go for java because it is a popular route to establish and fulfill your dreams.
We offer the best quality and affordable training, so you get trained from where you are, from our experienced instructors, remotely using Webex / Gotomeeting.
oops concept in java | object oriented programming in javaCPD INDIA
object oriented programming is a key concept for the development of application in windows as well as web based application environment. oops concept maps real world through its concept of classes, objects, inheritance, polymorphism which help in making a robust application.
This is the presentation file about inheritance in java. You can learn details about inheritance and method overriding in inheritance in java. I think it's can help your. Thank you.
This presentation deals with pure object oriented concepts and defines basic principles of OOP's like Encapsulation , polymorphism , Inheritance and Abstraction.
Constructors, Destructors, call in parameterized Constructor, Multiple constructor in a class, Explicit/implicit call, Copy constructor, Dynamic Constructors and call in parameterized Constructor
This is the presentation file about inheritance in java. You can learn details about inheritance and method overriding in inheritance in java. I think it's can help your. Thank you.
This presentation deals with pure object oriented concepts and defines basic principles of OOP's like Encapsulation , polymorphism , Inheritance and Abstraction.
Constructors, Destructors, call in parameterized Constructor, Multiple constructor in a class, Explicit/implicit call, Copy constructor, Dynamic Constructors and call in parameterized Constructor
Class object method constructors in javaRaja Sekhar
Presented By :
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main() method is starting execution block of a java program.
If any java class contain main() method known as main class.
http://www.tutorial4us.com/java/java-main-method
In this you learn about
--Constructors in Java
--Types of Constructors
1. Default Constructor
2. Parameterized Constructor
Difference between Constructor and Method
Constructors In Java – Unveiling Object CreationGeekster
A constructor in Java is a unique method used in object-oriented programming to
initialize objects of a class. It is automatically invoked when an object is created
using the new keyword and has the same name as the class.
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2. Constructor
Constructor in java is a special type of method that is used to initialize the
object.
Java constructor is invoked at the time of object creation. It constructs the
values i.e. provides data for the object that is why it is known as
constructor.
2
3. Rules for creating java constructor
There are basically two rules defined for the constructor.
1. Constructor name must be same as its class name
2. Constructor must have no explicit return type
3
4. Types of java constructors
There are two types of constructors:
1. Default constructor (no-arg constructor)
2. Parameterized constructor
4
5. Default constructor
A constructor that have no parameter is known as default constructor.
Syntax of default constructor:
<class_name>(){}
Example of default constructor
In this example, we are creating the no-arg constructor in the Bike class. It will be invoked at the
time of object creation.
class Bike1{
Bike1(){
System.out.println("Bike is created")
;}
public static void main(String args[]){
Bike1 b=new Bike1();
}
}
5
6. Parameterized constructor
A constructor that have parameters is known as parameterized constructor.
Why use parameterized constructor?
Parameterized constructor is used to provide different values to
the distinct objects.
6
7. Example of parameterized constructor
In this example, we have created the constructor of Student class that have two parameters.
We can have any number of parameters in the constructor.
class Student4{
int id;
String name;
Student4(int i,String n){
id = i;
name = n;
}
void display(){System.out.println(id+" "+name);}
public static void main(String args[]){
Student4 s1 = new Student4(111,"Karan");
Student4 s2 = new Student4(222,"Aryan");
s1.display();
s2.display();
}
}
7
9. Constructor overloading
Like other methods in java constructor can be overloaded i.e. we can
create as many constructors in our class as desired. Number of
constructors depends on the information about attributes of an object we
have while creating objects.
9
10. example: constructor overloading example:
class Language {
String name;
Language() {
System.out.println("Constructor method called.");
}
Language(String t) {
name = t;
}
public static void main(String[] args) {
Language cpp = new Language();
Language java = new Language("Java");
cpp.setName("C++");
java.getName();
cpp.getName();
}
void setName(String t) {
name = t;
}
void getName() {
System.out.println("Language name: " + name);
}
}
10