Question

how can I parse and addition two value?
Im usin this pattern:

String s = "6 + 7 =";

Included spacing, I need to get “13”

It is possible with regex, or there are an other way to do this easely?

Thanks in advance for ur help.

Answer 1

If you want to use regex you can do it this way:

Pattern pattern = Pattern.compile("(\\d+)\\s*\\+\\s*(\\d+)\\s*=");
Matcher matcher = pattern.matcher("6 + 7 =");
if (matcher.matches()) {
    System.out.println(Integer.valueOf(matcher.group(1)) + Integer.valueOf(matcher.group(2)));
}