In this java regex tutorial, we will learn to test whether number of words in input text is between some minimum and maximum limit.
The following regex is very similar to the previous tutorial of limiting the number of nonwhitespace characters, except that each repetition matches an entire word rather than a single nonwhitespace character. It matches between 2 and 10 words, skipping past any non-word characters, including punctuation and whitespace:
Regex : ^\\W*(?:\\w+\\b\\W*){2,10}$
List<String> inputs = new ArrayList<String>(); inputs.add("LOKESH"); //Incorrect inputs.add("JAVA CRAZY"); inputs.add("LOKESH GUPTA INDIA"); inputs.add("test whether number of words in input text is between some minimum and maximum limit"); //Incorrect String regex = "^\\W*(?:\\w+\\b\\W*){2,10}$"; Pattern pattern = Pattern.compile(regex); for (String input : inputs) { Matcher matcher = pattern.matcher(input); System.out.println(matcher.matches()); } Output: false true true false
I will advise to play with above simple regular expression to try more variation.
Happy Learning !!