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To match a certain range of characters, that is, to match all characters between two specified characters in a sequence, the character class can be used as
[a-z]
expression " [a-zA-Z] accepts any English letter.
expression " [0-9 &&[^ 35]] accept3and5other numbers.
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 = "^[a-zA-Z0-9]*$"; //Compile Regular Expression Pattern pattern = Pattern.compile(regex); //Search Matcher Object Matcher matcher = pattern.matcher(input); if(matcher.matches()) { System.out.println("Match Occurred"); } else { System.out.println("Match Not Occurred"); } } }
Enter a String Hello Match Occurred
Enter a String sample# Match Not Occurred
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 = "[0-9&&[^35]]"; //Compile Regular Expression Pattern pattern = Pattern.compile(regex); //Search Matcher Object Matcher matcher = pattern.matcher(input); int count = 0; while(matcher.find()) { count++; } System.out.println("Occurrences :");+count); } }
Output Result
Enter a String 111223333555689 Occurrences :8