The document explains the concept of constructors in Java, including their definition, rules for creating them, and the two types: default and parameterized constructors. It highlights that constructors are used to initialize objects and must have the same name as the class with no return type. An example is provided to demonstrate a parameterized constructor's functionality.

1. 1

2. CONSTRUCTOR
Presented by
2022
4th November

3. OBJECTIVES
3
• What is Constructor?
• Rules of Constructor
• Types of Constructor
• Constructor examples

4. 4
 In one constructor we can use different
Parameters.(String name, int number)
CONSTRUCTOR
In java,a Constructor is a block of codes
similar to the method. which is used to
initialize the object.
It has no return type.
Every class contain at-least one Constructor.
Symbol of Constructor
i.e. MyClass{
MyClass(String name){
 We do not require to call the constructor
manually. It automatically invokes implicitly
during the instantiation..

5. 5
RULES FOR CREATING JAVA
CONSTRUCTOR
• Constructor name must be the same
as its class name.
• A Constructor must have no explicit
return type.

6. 6
Default Constructor Parameterized Constructor
 Default Constructor doesn't have any
parameter.
 Syntax of default constructor:
<class-name>(){
}
 It has a specific number of parameters.
 It is used to provide different values to
distinct objects. You can provide the same
values also.
TYPES OF JAVA CONSTRUCOR
There are two types of constructor in java:
• Default Constructor(no-argument Constructor)
• Parameterized Constructor

7. 7
Constructor Example
Create a Constructor class which show a
vehicle model and name.
public class MainClass2 {
int modelYear;
String modelName;
public MainClass2(int year, String name) {
modelYear = year;
modelName = name;
}
public static void main(String[] args) {
MainClass2 myCar=new MainClass2(2022,"Vigo");
System.out.println(myCar.modelYear+" "+ myCar.modelName);
}
}
output=
2022 Vigo

8. 8
Please ask one question at a time.
Give respect to each other.
QUESTION ANSWER SESSION!

9. THANK YOU!
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