The first input will be radius then followed by length and width at next line.
The first input will be radius then followed by length and width at next line.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
Related questions
Question
Java
Transcribed Image Text:Input
依次输入圆形对象的半径值、长方形对象的长和宽。
The first input will be radius
then followed by length and width at next line.
Output
Circle, Rectangle calArea().
Examples
input
5
46
output
78.50
24.00
![Please declare a abstract class Shape, having the abstract method calArea() to compute the area of the shape.
Two classes Rectangle and Circle are derived from Shape.
Class Rectangle has float data field length and width.
Class Circle has float data field radius.
The main class is given as shown in Preset code.
import java.util.Scanner;
public class Main{
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
double radius, length, width;
radius = in.nextDouble();
Shape circle = new Circle(radius);
System.out.println(String.format("%.2f",circle.calArea()));
(Preset code)
}
}
length = in.nextDouble();
width= in.nextDouble();
shape rectangle = new Rectangle(length, width);
System.out.println(String.format("%.2f", rectangle.calArea()));
}
abstract class Shape{
public abstract double calArea();](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa4badb86-e266-493d-bb0a-ad33cde53ba0%2F4a18615a-6fea-4177-b3fc-0966cdb25620%2Fui9yrb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Please declare a abstract class Shape, having the abstract method calArea() to compute the area of the shape.
Two classes Rectangle and Circle are derived from Shape.
Class Rectangle has float data field length and width.
Class Circle has float data field radius.
The main class is given as shown in Preset code.
import java.util.Scanner;
public class Main{
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
double radius, length, width;
radius = in.nextDouble();
Shape circle = new Circle(radius);
System.out.println(String.format("%.2f",circle.calArea()));
(Preset code)
}
}
length = in.nextDouble();
width= in.nextDouble();
shape rectangle = new Rectangle(length, width);
System.out.println(String.format("%.2f", rectangle.calArea()));
}
abstract class Shape{
public abstract double calArea();
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