Java searching float number in String

Question

let\'s say i have string like that:

eXamPLestring>1.67>>ReSTOfString

my task is to extract only 1.67 from string above.

Answer 1

Have a look at this link, they also explain a few things that you need to keep in mind when building such a regex.

[-+]?[0-9]*\.?[0-9]+

example code:

String[] strings = new String[3];

    strings[0] = "eXamPLestring>1.67>>ReSTOfString";
    strings[1] = "eXamPLestring>0.57>>ReSTOfString";
    strings[2] = "eXamPLestring>2547.758>>ReSTOfString";

    Pattern pattern = Pattern.compile("[-+]?[0-9]*\\.?[0-9]+");

    for (String string : strings)
    {
        Matcher matcher = pattern.matcher(string);
        while(matcher.find()){
            System.out.println("# float value: " + matcher.group());
        }
    }

output:

# float value: 1.67
# float value: 0.57
# float value: 2547.758