Class

DEMO1:

// CLASS: Class Defines the blueprint for set of object of the same type
// OBJECT: Each object is unique real and has properties and action

public class ClassDemo1 {

public static void main(String[] args) {

Circle obj = new Circle();
obj.radius = 2.22;
obj.area = 3.14 * obj.radius * obj.radius ;
System.out.println("Obj1 area is: "+obj.area);

Circle obj2 = new Circle();
obj2.radius = 5.55;
obj2.area = 3.14 *obj2.radius*obj2.radius;
System.out.println("Obj2 area is: "+obj2.area);
}
}


class Circle{

double radius ;
double area ;

}

DEMO2:


public class ClassDemo2 {

public static void main(String[] args) {

CircleClass obj1 = new CircleClass();
obj1.findArea(2.22);

CircleClass obj2 = new CircleClass();
obj2.findArea(5.55);
}
}


class CircleClass{

double radius;
double area;

public void findArea(double radius) {

this.radius = radius;
area = 3.14 * this.radius * this.radius ;
System.out.println("The area is: "+area);
}

}