Java Program to calculate the discriminant of quadratic equation

//Program to calculate the discriminant of quadratic equation
import java.util.*;
class quadratic
    {
  public static void main(String args[] )
      {
        double a,b,c,k;
        Scanner obj=new Scanner(System.in);
        System.out.println("Enter Co-efficients value");
        a=obj.nextDouble();
        b=obj.nextDouble();
        c=obj.nextDouble;
        k=b*b-4*a*c;
    if(k<0)
        System.out.println("\n It has no real solutions");
    else if(k>0)
        System.out.println("\n It has two real solutions");
    else
        System.out.println("\n It has one real solution");
      }
    }