I keep getting an error every time i try to calculate the diameter

My code works fine until I try to calculate the Diameter. I ran the program while only calculating the area and circumference and it works. But as soon as I try to calculate the diameter I keep getting an error.

package calccircumference;


import java.util.Scanner;

public class CalcCircumference {

    
    public static void main(String[] args) {
        Scanner input = new Scanner( System.in );
        int radius;
        
        System.out.print("Enter radius of circle: ");
        radius = input.nextInt();
        
        
        System.out.printf("Diameter is %f\n",( 2*radius ));
        
        System.out.printf( "Area is %f\n", ( Math.PI * radius * radius ) );
        
        System.out.printf("Circumference is %f\n",(2 * Math.PI * radius));
        
        
    }
    
}

[enter image description here][1]


  [1]: https://i.stack.imgur.com/2X0Dp.png

>Solution :

An integer multiplied by an Integer will give you an Integer so change to

System.out.printf("Diameter is %f\n",( 2.0 *radius ));

Or use

System.out.printf("Diameter is %d\n",( 2 *radius ));