java 判断电话号码，邮箱格式是否正确

public static boolean isPhoneNumberValid(String phoneNumber) {
boolean isValid = false;


String expression = "((^(13|15|18)[0-9]{9}$)|(^0[1,2]{1}\\d{1}-?\\d{8}$)|(^0[3-9] {1}\\d{2}-?\\d{7,8}$)|(^0[1,2]{1}\\d{1}-?\\d{8}-(\\d{1,4})$)|(^0[3-9]{1}\\d{2}-? \\d{7,8}-(\\d{1,4})$))";
CharSequence inputStr = phoneNumber;


Pattern pattern = (expression);


Matcher matcher = (inputStr);


if (()) {
isValid = true;
}


return isValid;
}


public boolean isEmail(String email) {
String str = "^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$";
Pattern p = (str);
Matcher m = (email);


return ();
}