삭제 및

Question

최근 주소록에 수정 나는 대부분의 작업이 설정 한 주소록에 근무했습니다 접촉을

표시 연락처를 변경 연락처

의

• 항목을
• 모든 연락처 표시
• 삭제 연락처.

연락처 입력 및 모든 연락처 표시가 작동하지만 나머지를 만드는 방법을 알지 못합니다.

이

내가 지금까지 한 일이다 메인 클래스 :

import java.util.ArrayList; 
import java.util.List; 
import java.util.Scanner; 

public class AddressBook { 
    private static List<Data> contact = new ArrayList<Data>(); 

    public static void main(String[] args) { 

     AddressBook addressBook = new AddressBook(); 


     Scanner sc = new Scanner(System.in); 
     int menu; 
     String choice; 

     System.out.println(" 0. Exit. "); 
     System.out.println(" 1. Add contact. "); 
     System.out.println(" 2. Edit contact. "); 
     System.out.println(" 3. Outprint contact. "); 
     System.out.println(" 4. Outprint all contacts. "); 
     System.out.println(" 5. Delete contact. "); 
     menu = sc.nextInt(); 

     while (menu != 0) { 

      switch (menu) { 

      case 1: 
       while (menu != 2) { 
        System.out.println("Enter First Name: "); 
        String firstName = sc.next(); 
        System.out.println("Enter Last Name: "); 
        String lastName = sc.next(); 
        System.out.println("Enter email: "); 
        String email = sc.next(); 
        contact.add(new Data(firstName, lastName, email));// Creating a new object and adding it to list 
        System.out.println("Would you like to add someone else? 1: Yes, 2: No"); 
        menu = sc.nextInt(); 
       } 
       break; 

      case 2: 
       System.out.println("Enter First Name of contact that you would like to edit: "); 
       int index = sc.nextInt(); 

       break; 
      case 3: 
       System.out.println("Enter First Name of contact that you would like to delete: "); 
       choice = sc.next(); 
       break; 
      case 4: 
       System.out.println(addressBook.contact); 
       break; 
      case 5: 
       System.out.println("Vpišite ime osebe, ki jo želite izbrisati: "); 
       choice = sc.next(); 
       contact.remove(choice); 
       break; 
      } 

      System.out.println(" 0. Exit. "); 
      System.out.println(" 1. Add contact. "); 
      System.out.println(" 2. Edit contact. "); 
      System.out.println(" 3. Outprint contact. "); 
      System.out.println(" 4. Outprint all contacts. "); 
      System.out.println(" 5. Delete contact. "); 
      menu = sc.nextInt(); 
     } 
     System.out.println("Goodbye!"); 

    } 

    private void addData(String firstName, String lastName, String email) { 
     Data person = new Data(firstName, lastName, email); 
     contact.add(person); 
    } 
} 

및 데이터 클래스 :

public class Data { 
    private String firstName = null; 
    private String lastName = null; 
    private String email = null; 

    public Data(String firstName, String lastName, String email) { 
     this.firstName = firstName; 
     this.lastName = lastName; 
     this.email = email; 
    } 

    public String getFirstName() { 
     return firstName; 
    } 

    public void setFirstName(String firstName) { 
     this.firstName = firstName; 
    } 

    public String getLastName() { 
     return lastName; 
    } 

    public void setLastName(String lastName) { 
     this.lastName = lastName; 
    } 

    public String getEmail() { 
     return email; 
    } 

    public void setEmail(String email) { 
     this.email = email; 
    } 


    public String toString() { 
     return String.format(firstName+" "+lastName+" "+email); 
    } 
} 

Answer 1

삭제는 다음과 같이 작동합니다 :

/** 
* Will work long as there are no two contacts with same first name. In that case 
* you'll need more data to find a unique contact. 
*/ 
private void deleteByFirstName(String firstName) { 
    for (Iterator<Data> iterator = contact.iterator(); iterator.hasNext();) { 
    Data temp = iterator.next(); 

    // Add null checks for proper error handling. 

    if (temp.getFirstName().equalsIgnoreCase(firstName)) { 
     iterator.remove(); 
     return; 
    } 
    } 

    System.out.println("No contact with first name " + firstName + " was found."); 
} 

당신 단일 연락처를 표시하거나 편집하는 데 유사한 논리를 사용할 수 있습니다. 연락처를 반복하는 헬퍼 메소드를 작성해, 양쪽 모두에 사용할 수있는 일치하는 연락처를 돌려줍니다. 그런 다음 Data 개체를 인쇄하거나 편집하십시오.