Get int from String, also containing letters, in Java

Question

How can I get the int value from a string such as 423e - i.e. a string that contains a number but also maybe a letter?

Integer.parseInt() f

Answer 1

Perhaps get the size of the string and loop through each character and call isDigit() on each character. If it is a digit, then add it to a string that only collects the numbers before calling Integer.parseInt().

Something like:

    String something = "423e";
    int length = something.length();
    String result = "";
    for (int i = 0; i < length; i++) {
        Character character = something.charAt(i);
        if (Character.isDigit(character)) {
            result += character;
        }
    }
    System.out.println("result is: " + result);