CODEWITHSUNDEEP
javacharacterdelimiter
Adrian Le Roy Devezin
Adrian Le Roy Devezin

Reputation: 843

Using Java delimiters to match any one character

I have done a search but have not been able to find an example that explained so I understood or that pertained to my exact question. I am trying to write a program that cancels out the letters A and B and reads the numbers inbetween, such as A38484B3838. I tried using 

    scanner.useDelimiter("[AB]");

but it doesnt work. It throws invalid input (I'm reading scanner.nextInt()) after it. can anyone help?

Upvotes: 0

Views: 750

Answers (2)

Juvanis
Juvanis

Reputation: 25950

Try using regular expressions. It could really facilitate your work.

public static void main(String[] args)
{
    String str = "A38484B3838";
    String regex = "(\\d+)";

    Matcher m = Pattern.compile(regex).matcher(str);

    ArrayList<Integer> list = new ArrayList<Integer>();

    while (m.find()) {
        list.add(Integer.valueOf(m.group()));
    }

    System.out.println(list);
}

Output of the program above:

[38484, 3838]

Upvotes: 0

Clayton Louden
Clayton Louden

Reputation: 1076

public static void main(String[] args) {
  String s = "A38484B3838";
  Scanner scanner = new Scanner(s).useDelimiter("[AB]");
  while (scanner.hasNextInt()) {
    System.out.println(scanner.nextInt());
  }
}

produces

38484
3838

It seems like the output you'd expect.

Upvotes: 3

Related Questions