Answer by Deep for masking of email address in java

    public static string GetMaskedEmail(string emailAddress)    {        string _emailToMask = emailAddress;        try        {            if (!string.IsNullOrEmpty(emailAddress))            {                var _splitEmail = emailAddress.Split(Char.Parse("@"));                var _user = _splitEmail[0];                var _domain = _splitEmail[1];                if (_user.Length > 3)                {                    var _maskedUser = _user.Substring(0, 3) + new String(Char.Parse("*"), _user.Length - 3);                    _emailToMask = _maskedUser +"@"+ _domain;                }                else                {                    _emailToMask = new String(Char.Parse("*"), _user.Length) +"@"+ _domain;                }            }        }        catch (Exception) { }        return _emailToMask;    }