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For example:
1 import java.util.*;
2 class rectangle1
3 {
4 int length,breadth,area, perimeter;
5 rectangle1(int l, int b)
6 {
7 length=l;
8 breadth=b;
9 }
10 void cal()
11 {
12 area = length * breadth;
13 perimeter = 2*(length+breadth);
14 }
15 void display ()
16 { System.out.println("Area of Rectangle:" + area);
17 System.out.println("Perimeter of Rectangle:" + perimeter);
18 }
19 public static void main(String[] args) {
20 Scanner sc= new Scanner(System.in);
21 int l1,b1;
22 System.out.println("Enter length and breadth");
23 l1=sc.nextInt();
24 b1=sc.nextInt();
25 rectangle1 ob = new rectangle1(l1,b1);
26 ob.cal();
27 ob.display();
28 }
29 }
Non-parameterised Constructor
A non-parameterised constructor is a type of constructor without parameters. However, it has
statements inside its body. It is also known as no-argument constructor. This type of constructor has
the same signature as that of the default constructor, but the difference is that it can have any values
to initialize the instance variables.
Java Programming 119
