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import java.util.*; public class Main{ private TreeMap<String, String> phonebook; public Main() { phonebook = new TreeMap<String, String>(); } public void addPair(String name, String phoneNumber) { if (isValidPhoneNumber(phoneNumber)) { phonebook.put(name, normalizePhoneNumber(phoneNumber)); } else { System.out.println("Invalid phone number: " + phoneNumber); } } public void deletePair(String name) { phonebook.remove(name); } public String getPhoneNumber(String name) { return phonebook.get(name); } public void printAllPairs() { for (Map.Entry<String, String> entry : phonebook.entrySet()) { System.out.println(entry.getKey() + ": " + entry.getValue()); } } private boolean isValidPhoneNumber(String phoneNumber) { return phoneNumber.matches("(\\+359|00359|0)8[789]\\d{7}"); } private String normalizePhoneNumber(String phoneNumber) { if (phoneNumber.startsWith("+")) { return phoneNumber; } else if (phoneNumber.startsWith("00")) { return "+" + phoneNumber.substring(2); } else if (phoneNumber.startsWith("0")) { return "+359" + phoneNumber.substring(1); } else { return null; } } public static void main(String[] args) { Main phonebook = new Main(); Scanner kb = new Scanner(System.in); System.out.println("Name, Number: "); phonebook.addPair(kb.nextLine(), kb.nextLine()); System.out.println("Name, Number: "); phonebook.addPair(kb.nextLine(), kb.nextLine()); phonebook.printAllPairs(); kb.close(); } }
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