Question

I’m working on assignment here, part of which requires me to parse integers from a string that has groups of digits separated by any other character. I know I can use the wrapper class method Integer.parseInt(string) to parse ints from a string containing just digits, but how would I go about doing it in this case? So far, I’ve considered doing a linear search of the string and assigning a variable to the first index where a digit appears and the index after the last digit appears and creating a temporary substring based on these indices from which to parse the int. Is this a valid approach? Perhaps there is a more efficient one?

Answer 1

If it can be any character (one or more), then this might be helpful:

String[] aarray = str.split("[^\\d]+");

E.g.:

String str = "12fdvvsd34.;h56s67.45c56";
String[] aarray = str.split("[^\\d]+");

for(int i = 0; i < aarray.length; i++)
    System.out.println(Integer.parseInt(aarray[i]));

Output:

12
34
56
67
45
56