Question

i am not much familiar with regex expressions use in Java.
If i have a String this/is/a/file!/path

now with substring and indexOf i can find the name file appearing inbetween / and ! but i am pretty sure such tasks must be much easier using regexes.

Can someone give me an example for doing so using regex expressions?

Answer 1

Another way is to use Pattern and Matcher. Here you can use groups and more complex operations

Pattern pattern = Pattern.compile(yourRegex);
Matcher matcher = pattern.matcher(yourText);
while(matcher.find()) {
   System.out.println(matcher.group(1));
}

Take a look at

Matcher : http://docs.oracle.com/javase/1.5.0/docs/api/java/util/regex/Matcher.html

Pattern : http://docs.oracle.com/javase/1.4.2/docs/api/java/util/regex/Pattern.html

Regex in Java : http://docs.oracle.com/javase/tutorial/essential/regex/