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How to match a non-word character using Java RegEx?
All the characters other than the English alphabet (both cases) and, digits (0 to 9) are considered as non-word characters. You can match them using the meta character “\W”.
Example 1
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String args[]) {
//Reading String from user
System.out.println("Enter a String");
Scanner sc = new Scanner(System.in);
String input = sc.nextLine();
String regex = "^\W{5}";
//Compiling the regular expression
Pattern pattern = Pattern.compile(regex);
//Retrieving the matcher object
Matcher matcher = pattern.matcher(input);
if(matcher.find()) {
System.out.println("Match occurred");
} else {
System.out.println("Match not occurred");
}
}
}Output 1
Enter a String *&&^# Match occurred
Output 2
Enter a String hello Match not occurred
Example 2
import java.util.Scanner;
public class RegexExample {
public static void main( String args[] ) {
String regex = "\W*";
System.out.println("Enter input value: ");
Scanner sc = new Scanner(System.in);
String input = sc.nextLine();
boolean bool = input.matches(regex);
if(bool) {
System.out.println("match occurred");
} else {
System.out.println("match not occurred");
}
}
}Output
Enter input value: #*** match occurred
Updated on: 19-Nov-2019
1K+ Views
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