Question

I want to find integer value from a string. For example, given a String like “Ahmedabad to Gandhinagar Distance:29km(about 31 mins)”

I want to fetch only 29 from the given String because i want to compare this 29 kilometers to other kilometers.

Answer 1

In C#, you can use a Regex.Match to pull out substrings if you use groups in the regex (note this is not tested…). There is probably a similar mechanism in Java, but I don’t know it off the top of my head:

var myString = @"Ahmedabad to Gandhinagar Distance:29km(about 31 mins)";
var myRegex = @".*:(\d*)km.*";
var match = Regex.Match(myString, myRegex);

if (match.Success)
{
    // match.Groups contains the match "groups" in the regex (things surrounded by parentheses)
    // match.Groups[0] is the entire match, and in this case match.Groups[1] is the km value
    var km = match.Groups[1].Value;
}