java phone number / ID (*) several middle encryption hide a few

4 // before the phone number reserved 3

 String phone = "18771632488";  
        System.out.println(phone.replaceAll("(\\d{3})\\d{4}(\\d{4})","$1****$2"));  

 

// ID number reserved before 4 after 4

 String idCard = "421302199208165464";
 System.out.println(idCard.replaceAll("(\\d{4})\\d{10}(\\d{4})", "$1****$2"));

 

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