Android hidden phone number middle four bit and hidden email address middle four bit

/**
* * * * # Hide the middle number with the phone number
*
* @param phone
* @return
*/
public static string Settingphone (String phone) {
    String phone_s = Phone.replaceall ("(\\d{3}) \\d{4} (\\d{4})", "$1****$2");
    return phone_s;
}


/**
* * * * * * Hide the letters in front of the mailbox
*
* @return
*/
public static string Settingemail (string email) {
    String emails = Email.replaceall ("(\\w?) (\\w+) (\\w) (@\\w+\\. [A-z]+ (\\.[ a-z]+) "," $1****$3$4 ");
    return emails;
}

Android hidden phone number middle four bit and hidden email address middle four bit