How to find alphanumarix persists in a string in java by jayanthi ganesh

import java.util.*;

public class Alphanumarix {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
boolean alphanumarix = s.matches("[0-9a-zA-Z]+");
if (alphanumarix) System.out.println("True");
else System.out.println("False");
}
}