java regex regular expression 4 letters followed by 2 integers

/**
 * @author lautturi.com 
 * Java example: regular expression 4 letters followed by 2 integers
 */

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

public class Lautturi {
	public static void main(String[] args) {

		String str = "hello123";
		Pattern p = Pattern.compile("[A-Za-z]{4}[0-9]{2}");
		Boolean b = p.matcher(str).find();

		System.out.println(b);
	}
}

output:

true