Multiple_classes_and_objects.java

package NPTEL1;
//class circle1
class Circle1{
	double x,y; //coordinates of center
	double r;// radius of circle
	//method for circumference
	double circumference() {
		return 2*3.14159*r;
	}
	//method for area
	double area() {
		return (22/7)*r*r;
	}
}
//another class Box
class Box{
	double width;// width of the box
	double length;//length of the box;
	double height;//height of the box
	
	//method of the class Box for area calculation
	double area() {
		double a;
		a=(width*height+width*length+length*height)*2;
		return a;
	}
	//method of the class Box to calculate the volume  
	double volume() {
		double v;
		v=length*height*width;
		return v;
	}
}
// main class
public class Multiple_classes_and_objects {
		public static void main (String[]args) {
			Circle1 c= new Circle1();//object of the class circle
			Box b=new Box();//object of the class Box
			//initialization of the both the objects 
			c.x=0.0;
			c.y=0.0;
			c.r=5.0;
			b.length=6.0;
			b.height=3.0;
			b.width=5.0;
			//print statement for answer
		System.out.println("Circumference: "+c.circumference());
		System.out.println("Area: "+c.area());
		System.out.println("Area: "+b.area());
		System.out.println("Volume: "+b.volume());
		
		
		
		}
}