How to convert a word of a scanned String into a double in Java?

I’m trying to scann a String from the terminal and convert the second word into a double so I can use it inside a method which takes a double as an argument. So when I give accelerate 10 in the terminal, I can use accelerate to trigger a method called accelerate and give 10 as an argument to it. This is my code:

public static void main(String[] args) {
    Racecar racecar = new Racecar();

    Scanner scanner = new Scanner(System.in);

    while (true) {
        String scanned = scanner.nextLine();
        if (scanned.split(" ")[0] == "accelerate") {
            racecar.accelerate(scanned.split(" ")[1].Double.parseDouble());
        }
    }
}

This is the error I’m getting:

    java: cannot find symbol
  symbol:   variable Double
  location: class java.lang.String

>Solution :

2 issues here:

1. Double.parseDouble take a String as an argument, so what you want is Double.parseDouble(scanned.split(" ")[1]) instead of scanned.split(" ")[1].Double.parseDouble()
2. Strings are not compared using == but using equals, so your code should be

this

if (scanned.split(" ")[0].equals("accelerate")) {
    racecar.accelerate(Double.parseDouble(scanned.split(" ")[1]));
}

ideally, to avoid splitting twice, refactor the code like this:

String[] splitted = scanned.split(" ");
if (splitted[0].equals("accelerate")) {
    racecar.accelerate(Double.parseDouble(splitted[1]));
}