Retrieve the String using expression
This Example describes the way to retrieve the String using expression.For this we are going to make program named NotLookahead.java. The steps involved in program NotLookahead.java are described below:-
String regex = "Tim (?!Bueneman)[A-Z]\\w+":-Here we have given the expression in the String form.The meaning of the whole expression is to find the name followed by Tim,Let us describe each expression seprately:-
?:-This character is used to match either one or zero times.
\\w:-This character is used to match any alphanumeric character
Pattern p = Pattern.compile(regex):-Creating a pattern object and compiles the given regular expression into a pattern.
Matcher m = p.matcher(no):-Creates a matcher for matching the given input against pattern p.
Output of the program:-