String phone="18678473547";
//String phones = phone.substring(0,phone.length()-(phone.substring(3)).length())+"****"+phone.substring(7);
String phones = phone.substring(0,3)+"****"+phone.substring(7);
System.out.println(phones);//结果：185****3547
String phone="18678473547";
//String phones = phone.substring(0,phone.length()-(phone.substring(3)).length())+"****"+phone.substring(7);
String phones = phone.substring(0,3)+"****"+phone.substring(7);
System.out.println(phones);//结果：185****3547