Can i get a proper expalantion about constructors in java??

Answer 1

Constructor is a member function that is used to instantiate a class.
Whenever you create an object of a class, the initialization of object can be done by constructor.
Constructor name is same as class name.
eg.
class Sample
{
public int a;
public Sample()
{
a=5;
}
public static void main(String arg[])
{
Sample s1= new Sample();
}
}

This code creates an object S1 of class Sample and initialize S1.a=5 during it's creation.

Answer 2

A constructor lets you instantiate (create) an object from its class.
your class is only a definition of an object.
if you want to create an object to use it in your code, you can do so by calling a constructor.
for example
your class Cookie defines properties and behaviour (attributes and methods) of cookies.

when you want to create a cookie to be used in your code you call the constructor.

Cookie createdCookieObject = new Cookie();

now the createdCookieObject can be used in your code to behave as defined in the Cookie class.