Examples of java.util.Scanner.nextDouble()

java.util.Scanner.nextDouble()
Scans the next token of the input as a double. This method will throw InputMismatchException if the next token cannot be translated into a valid double value. If the translation is successful, the scanner advances past the input that matched.
If the next token matches the Float regular expression defined above then the token is converted into a double value as if by removing all locale specific prefixes, group separators, and locale specific suffixes, then mapping non-ASCII digits into ASCII digits via {@link Character#digit Character.digit}, prepending a negative sign (-) if the locale specific negative prefixes and suffixes were present, and passing the resulting string to {@link Double#parseDouble Double.parseDouble}. If the token matches the localized NaN or infinity strings, then either "Nan" or "Infinity" is passed to {@link Double#parseDouble(String) Double.parseDouble} as appropriate. @return the double scanned from the input @throws InputMismatchException if the next token does not match the Float regular expression, or is out of range @throws NoSuchElementException if the input is exhausted @throws IllegalStateException if this scanner is closed

       Scanner numberReciever = new Scanner(System.in);
       double num1, num2, answer;
       
       System.out.println("Calculator> Number 2 is subtracted from Number 1.");
       System.out.println("Calculator> Enter your first number: ");
       num1 = numberReciever.nextDouble();
    
       System.out.println("Calculator> Enter your second number: ");
       num2 = numberReciever.nextDouble();
    
       answer = num1 - num2;

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       System.out.println("Calculator> Number 2 is subtracted from Number 1.");
       System.out.println("Calculator> Enter your first number: ");
       num1 = numberReciever.nextDouble();
    
       System.out.println("Calculator> Enter your second number: ");
       num2 = numberReciever.nextDouble();
    
       answer = num1 - num2;
       System.out.println("Calculator> The answer is " + answer);
       System.out.println("Calculator> Thank you for using the calculator! More coming soon.");
       System.out.println("Calculator> This program ran for " + System.currentTimeMillis() + " miliseconds.");

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       Scanner numberReciever = new Scanner(System.in);
       double num1, num2, answer;
       
       System.out.println("Calculator> Number 2 is divided by Number 1.");
       System.out.println("Calculator> Enter your first number: ");
       num1 = numberReciever.nextDouble();
    
       System.out.println("Calculator> Enter your second number: ");
       num2 = numberReciever.nextDouble();
    
       answer = num1 / num2;

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       System.out.println("Calculator> Number 2 is divided by Number 1.");
       System.out.println("Calculator> Enter your first number: ");
       num1 = numberReciever.nextDouble();
    
       System.out.println("Calculator> Enter your second number: ");
       num2 = numberReciever.nextDouble();
    
       answer = num1 / num2;
       System.out.println("Calculator> The answer is " + answer);
       System.out.println("Calculator> Thank you for using the calculator! More coming soon.");
       System.out.println("Calculator> This program ran for " + System.currentTimeMillis() + " miliseconds.");

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    static void Multiplication(){
        Scanner numberReciever = new Scanner(System.in);
        double num1, num2, answer;
    
        System.out.println("Calculator> Enter your first number: ");
        num1 = numberReciever.nextDouble();
    
        System.out.println("Calculator> Enter your second number: ");
        num2 = numberReciever.nextDouble();
    
        answer = num1 * num2;

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        System.out.println("Calculator> Enter your first number: ");
        num1 = numberReciever.nextDouble();
    
        System.out.println("Calculator> Enter your second number: ");
        num2 = numberReciever.nextDouble();
    
        answer = num1 * num2;
        System.out.println("Calculator> The answer is " + answer);  
        System.out.println("Calculator> Thank you for using the calculator! More coming soon.");
        System.out.println("Calculator> This program ran for " + System.currentTimeMillis() + " miliseconds.");

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    DecimalFormat dollar = new DecimalFormat("#,###.00");
    
    Scanner keyboard = new Scanner(System.in);
    
    System.out.println("What is your starting balance? ");
    initialBalance = keyboard.nextDouble();
    
    System.out.println("How many checks have you written? ");
    checks = keyboard.nextInt();
    
    BankCharges charges = new BankCharges(initialBalance, checks);

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    DecimalFormat dollar = new DecimalFormat("#,###.00");
    
    Scanner keyboard = new Scanner(System.in);
    
    System.out.println("What is your annual interest rate? ");
    interestRate = keyboard.nextDouble();
    
    System.out.println("What is your starting balance? ");
    initialBalance = keyboard.nextDouble();
    
    System.out.println("How many months have passed since you opened your account? ");

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    System.out.println("What is your annual interest rate? ");
    interestRate = keyboard.nextDouble();
    
    System.out.println("What is your starting balance? ");
    initialBalance = keyboard.nextDouble();
    
    System.out.println("How many months have passed since you opened your account? ");
    months = keyboard.nextInt();


    SavingsAccount account = new SavingsAccount(initialBalance);

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    account.rate(interestRate);
    
    while (months > 0)
    {
    System.out.println("What was deposit amount for month " + months + "? ");
    deposit = keyboard.nextDouble();
    account.deposit(deposit);
    
    System.out.println("What was withdrawal amount for month " + months + "? ");
    withdrawal = keyboard.nextDouble();
    account.withdraw(withdrawal);

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