@@ -0,0 +1,335 @@
+package business;%0Apublic class ContactsBook%0A%7B%0A  public static void addContact()%7B%0A  %0A  %7D%0A  %0A  public static void removeContact()%7B%0A  %0A  %0A  %7D%0A  %0A  public static void updateContact()%7B%0A  %0A  %0A  %7D%0A  %0A  public static void printAllContacts()%7B%7D%0A  %0A  public static void printContactsKeys()%7B%7D%0A  %0A  public static void main(String%5B%5D args)%0A  %7B%0A  %7D%0A%7D%0A

Create ContactsBook.java