Java regex validate car plates

/**
 * @author lautturi.com 
 * Java example: Java regex for car plates
 */


import java.util.*;
import java.util.regex.*;

public class Lautturi {

	public static void main(String[] args) {
		String carPlate = "B001OK";
		
		String carPlateRegex = "[ABEKMHOPCTYX]{1}[0-9]{3}[ABEKMHOPCTYX]{2}";
		Pattern p = Pattern.compile(carPlateRegex);
		Matcher m = p.matcher(carPlate);
		Boolean b = m.matches();     
		if(b) {
			System.out.println("car plate");
		}
	}
}