I want to enter value of a,b and c by the user (I can not do that using Log window in JDeveloper 12 c)  in the following program?

import java.util.Scanner;

public class Class2 {
    public static void main(String[] args) {
        int a,b,c;
                       Scanner s=new Scanner(System.in);
                        System.out.println("Enter the value a");
                        a=s.nextInt();

        System.out.println("Enter the value b");
                        b=s.nextInt();
        System.out.println("Enter the value c");
                        c=s.nextInt();
                        int k=(b*b)-4*a*c;
                        if(k<0)
                        {
                                System.out.println("No real roots");
                        }
                        else
                        {
                                double l=Math.sqrt(k);
                                x=(-b-l)/2*a;
                                y=(-b+l)/2*a;
                                System.out.println("Roots of given equation:"+x+" "+y);
                        }
               

    }
}