import java.util.*; import java.text.DecimalFormat; public class circle { public

Question

import java.util.*;

import java.text.DecimalFormat;

public class circle
{
public static void main(String[] args) {
// Declaring constant
final double PI = 3.14159;

// Declaring variables
double radius, area, circumference, surfaceArea, volume;

// Scanner object is used to get the inputs entered by the user
Scanner sc = new Scanner(System.in);

// DecimalFormat class is used to format the output
DecimalFormat df = new DecimalFormat("#.##");

// getting the radius entered by the user
System.out.print("Enter the radius of the circle ;");
radius = sc.nextDouble();

// calculating the area of the circle
area = PI * radius * radius;

// calculating the circumference of the circle
circumference = 2 * PI * radius;

// calculating the surface area of the sphere
surfaceArea = 4 * PI * radius * radius;

// calculating the volume of the sphere
volume = (4.0 / 3.0) * PI * radius * radius * radius;

// Displaying the results
System.out.println("Area of the Circle is :" + df.format(area));
System.out.println("Circumference of the Circle :"+ df.format(circumference));
System.out.println("Surface Area of the Sphere :"+ df.format(surfaceArea));
System.out.println("Volume of the Sphere :" + df.format(volume));

}

}

keep getting error source_file.java:8: error: class circle is public, should be declared in a file named circle.java public class circle ^ 1 error kinda new to java

Explanation / Answer

package chapter10;

import java.text.DecimalFormat;

import java.util.Scanner;

public class Circle {

public static void main(String[] args) {

// Declaring constant

final double PI = 3.14159;

// Declaring variables

double radius, area, circumference, surfaceArea, volume;

// Scanner object is used to get the inputs entered by the user

Scanner sc = new Scanner(System.in);

// DecimalFormat class is used to format the output

DecimalFormat df = new DecimalFormat("#.##");

// getting the radius entered by the user

System.out.print("Enter the radius of the circle ;");

radius = sc.nextDouble();

// calculating the area of the circle

area = PI * radius * radius;

// calculating the circumference of the circle

circumference = 2 * PI * radius;

// calculating the surface area of the sphere

surfaceArea = 4 * PI * radius * radius;

// calculating the volume of the sphere

volume = (4.0 / 3.0) * PI * radius * radius * radius;

// Displaying the results

System.out.println("Area of the Circle is :" + df.format(area));

System.out.println("Circumference of the Circle :" + df.format(circumference));

System.out.println("Surface Area of the Sphere :" + df.format(surfaceArea));

System.out.println("Volume of the Sphere :" + df.format(volume));

sc.close();

}

}

Note: Please save the file Name with Circle.java

your getting this error becuase if your java program has any public class than filename must be same class name, so here your having Circle as public so you must save file Circle.java ( Exactly as class name, it is case sensitive)

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