java programmings for beginners

Object creation is very important and essential thing in java. We use "new" keyword in this. This is a sample code for object creation. public class Object {     public static void main(String[] args) {               Circle circle = new Circle();         circle.radius = 3.5;         circle.area = 3.14 * circle.radius * circle.radius;         System.out.println("Circle area = "+circle.area);         }     } class Circle{     double radius;     double area; }