Constructor 

Constructor means name of the classes same but Parameter will be different.

Object does not to create of constructor 

Program:

class First 
{
void Display()
{
System.out.println("Hello world");
}
public static void main (String[] args)
{
First f1=new First();
f1.Display();
}
}

Output:-

Hello World

First = Default Constructor,implicit constructor

Types Of Constructor

Default

Parameterized

Copy

Explicit Constructor:- Explicit Constructor are those constructor in which are declare or provide by user . These constructor are visible or declare outside of class .

Implicit Constructor:- implicit constructor are invisible.