Constructors in Java

Constructors are special methods that are called automatically when an object of the class is created. Constructor have same name as the class and they dont have a return type not even void.
Basically there are 3 types of constructors

1. Default
2. Parameterized
3. Copy-constructor

Default Constructor:- This constructor takes no argument. It is called when an object is created without any explicit initialization.

              Money m1 = new Money();

If we have not defined any constructor then default constructor is provided by java.

Parameterized Constructor:- This constructor is called when object is created  and initialised with some value at the time of creation.

               Money m1 = new Money(1000,20);

Copy Constructor:- This constructors is called when an object is created. It's initialised with some other object of class at the time of creation.

               Money m1 = new Money(1000,20);             

               Money m2 = new Money(m1);

Definition of constructor looks like this

class Money

{

    private int rs, paisa;

    public Money()

    {

         rs = paisa = 0;

    }

    public Money (int r, int p)

    {

         rs = r;

         paisa = p;

    }

    public Money (Money m)

    {

         rs = m.rs;

         paisa = m.paisa;

    }

    public void set (int r, intp)

}

Always remember that we can call a method from an another method of the same class, simply by using it's name.