What is meant by a constructor?

Consider the following Java class and answer the questions given below:

class Rectangle
{
  int length, breadth;

  Rectangle()
  {
    length = 5;
    breadth = 3;
  }

  Rectangle(int l, int b)
  {
    length = l;
    breadth = b;
  }

  void area()
  {
    System.out.println("Area: " + (length * breadth));
  }

  public static void main(String args[])
  {
    Rectangle r1 = new Rectangle();
    Rectangle r2 = new Rectangle(8, 4);
    r1.area();
    r2.area();
  }
}

(a) Name the type of constructors used in the above class.

(b) What is the output of the method main()?

Define a class named FruitJuice with the following description:

Data Members	Purpose
int product_code	stores the product code number
String flavour	stores the flavour of the juice (e.g., orange, apple, etc.)
String pack_type	stores the type of packaging (e.g., tera-pack, PET bottle, etc.)
int pack_size	stores package size (e.g., 200 mL, 400 mL, etc.)
int product_price	stores the price of the product

Member Methods	Purpose
FruitJuice()	constructor to initialize integer data members to 0 and string data members to ""
void input()	to input and store the product code, flavour, pack type, pack size and product price
void discount()	to reduce the product price by 10
void display()	to display the product code, flavour, pack type, pack size and product price