This Java program is used to calculate the area of a circle. Example: import java.util.Scanner; public class CircArea { public static void main(String ag[]) { int rad; double pie = 3.14, ar; Scanner s = new Scanner(System.in); System.out.print("Enter radius of circle:"); rad = s.nextInt(); ar = pie * rad * rad; System.out.println("Area of ...

Apr 16, 2025 · The following Java program to print the area of a circle has been written in five simple different ways, static method, using constructor, Interface, inheritance with sample outputs for each program. Table of contents: 5 Simple ways to print AOC

Nov 3, 2013 · Use this.area =... or else you're just overwriting your input parameter. area and radius should be correlated. If you set the area to a given value, it should also set the radius. And if you set the radius, it should also set the area.

The Area_Circle class contains a main method which creates an object of the AreaOfCircle class and uses it to calculate the area of a circle. The program first calls the readRadius method of the AreaOfCircle object, which prompts the user to enter the radius of a circle and reads in the user's input using a Scanner .

In this example we will read radius of a circle and then calculate area, perimeter of a circle. We will create a class to find the area and perimeter. In this program we will use Math.PI to use value of PI. Scanner sc = new Scanner (System.in); . System.out.print("Enter radius:"); .

Dec 28, 2022 · How to calculate the circle area using the Java program? To calculate a circle's area in Java, we have to declare the class Area. Create an object of the scanner class as sc and read the radius of the circle from the user into the variable r by using nextDouble() method. Calculate it as a = 3.14 * r * r.

Jan 8, 2024 · In this quick tutorial, we’ll illustrate how to calculate the area of a circle in Java. We’ll be using the well-known math formula: r^2 * PI. 2. A Circle Area Calculation Method. Let’s first create a method that will perform the calculation: double area = radius * radius * Math.PI;

Here's a simple Java program that uses the Scanner class to get the radius of a circle from the user and then calculates the area: import java.util.Scanner; public class CircleArea {

Java Program to Calculate Area of Circle | In this tutorial, we will develop a Java program to calculate the area of the circle. The area of the circle is given as ℼ*radius*radius. Procedure To Develop A Java Program To Calculate Area Of The Circle, radius = scan.nextDouble(); // …

Apr 1, 2017 · This tutorial will teach you on how your Java program Calculate the Area of a Circle based on user input value. This tutorial will use a Scanner function and an Integer and Double data type for variables. Please follow all the steps to complete this tutorial. Calculate the Area of a Circle in Java Steps. Create a new class and name it what you ...