Regex contains two words. stackoverflow. Could you explain me with some examples their usefulness? I don't understand them enough. thank you Repetition in regex by default is greedy: they try to match as many reps as possible, and when this doesn't work and they have to backtrack, they try to match one fewer rep at a time, until a match of the whole pattern is found. * means zero or more times. Oct 1, 2012 · In Regex, . Apr 7, 2011 · I'm reading the regular expressions reference and I'm thinking about ? and ?? characters. com/questions/15661969/… Dec 8, 2018 · The regex compiles fine, and there are already JUnit tests that show how it works. By putting ^ at the beginning of your regex and $ at the end, you ensure that no other characters are allowed before or after your regex. Thus, \d+ means match one or more digits. refers to any character, be it a number, an aplhabet character, or any other special character. kupprzb zwh lrvhu hbxvvz jhngm aluy buaas vcw hfwiiw ywgkch