public class Mobile {
public static void main(String[] args) {
String mobile = "136****7423";
mobile = mobile.replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2");
System.out.println(mobile);
}
}
public class Mobile {
public static void main(String[] args) {
String mobile = "136****7423";
mobile = mobile.replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2");
System.out.println(mobile);
}
}