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You can use the meta-character “ \\S ”to match non-space characters.
import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String args[]) { //Read string from user System.out.println("Enter a String"); Scanner sc = new Scanner(System.in); String input = sc.nextLine(); String regex = "\\S"; //Compile regular expression Pattern pattern = Pattern.compile(regex); //Retrieve matcher object Matcher matcher = pattern.matcher(input); int count = 0; while(matcher.find()) { count++; } System.out.println("Number of characters (not spaces): " );+count); } }
Output Result
Enter a String Hello how are you welcome to w3codebox Number of characters (not spaces): 37