下面程序的运行结果是什么？import java.util.regex.Pattern;public class Validator { public static final String REGEX_EMAIL = "^([0-9a-zA-Z]([-.\\w]*[0-9a-zA-Z])*@(([0-9a-zA-Z])+([-\\w]*[0-9a-zA-Z])*\\.)+[a-zA-Z]{2,})$"; public static boolean isEmail(String email) { return Pattern.matches(REGEX_EMAIL, email); }public static void main(String[] args) { // TODO Auto-generated method stub String email = "fdsdfsdj@163.com"; System.out.println(Validator.isEmail(email)); //System.out.println(Validator.isChinese(username)); }}