Parabola elements calculator

try(Scanner scan = new Scanner(System.in)) {
  double a = scan.nextDouble();//read a double and put it in a variable named a
  //do more work here
}

try(Scanner scan = new Scanner(System.in)) {
  double a = scan.nextDouble();//read a double and put it in a variable named a
  //do more work here
}

double a;
try(…) {
   a = ...
}

double a;
try(…) {
   a = ...
}

try(Scanner scan = new Scanner(System.in)) {
    double a = scan.nextDouble();
    //int parabolaEqualtion = f(x)=A*x^2+B*x+C;
    double dirOfOpening = a;
    if (dirOfOpening < 0) {
        String trueDirOfOpening = "up";
        System.out.println(trueDirOfOpening);
    }
}

try(Scanner scan = new Scanner(System.in)) {
    double a = scan.nextDouble();
    //int parabolaEqualtion = f(x)=A*x^2+B*x+C;
    double dirOfOpening = a;
    if (dirOfOpening < 0) {
        String trueDirOfOpening = "up";
        System.out.println(trueDirOfOpening);
    }
}