錯誤搜索arraylist

Question

我有我的工作程序，創建一個地址數組，然後搜索它們。

但我的搜索只看第二個條目（在索引1）如何讓我的搜索查看所有條目而不是第二條？

隨意問我是否沒有發佈足夠的細節！

public static void main(String[] args)   //start method main 
    { 
    ArrayList<SJAddressBook> SJ = new ArrayList<SJAddressBook>(); 
    SJAddressBook aBook = null; 
    for (int count =0;count <3;count ++) 
    { 

    aBook = new SJAddressBook(); 
    SJ.add(aBook.addEntry()); 
    System.out.println(); 
    } 
    int foundIndex = aBook.search(SJ);   //execute search 
    System.out.println(); 
    if (foundIndex > -1) 
     SJ.get(foundIndex).display(); 
    else 
     System.out.println("No Entry Found!"); 

而且我的搜索

int search(List<SJAddressBook> addressBook)    
    { 
    Scanner entry = new Scanner(System.in); 

    System.out.println(" Search Menu;\n 1. First Name \n 2. Last Name \n 3. Street Address \n 4. City, State \n 5. Zip Code "); 
    System.out.println(); 
    System.out.print("Please enter Field to Search: "); 
    String menu = entry.next(); 
    System.out.println(); 
    System.out.print("Please enter Value to Search: "); 
    String value = entry.next(); 
    int index = 0; 
    for (SJAddressBook address : addressBook)   //recieve ArrayList as argument 
    { 
     switch (index)         //intitialze switch 
     { 
      case 1: 
      if (address.getFirstName().equalsIgnoreCase(value)) 
       return index; 
       break; 
      case 2: 
      if (address.getLastName().equalsIgnoreCase(value)) 
       return index; 
       break; 
      case 3: 
      if (address.getStreetAddress().equalsIgnoreCase(value)) 
       return index; 
       break; 
      case 4: 
      if (address.getCityState().equalsIgnoreCase(value)) 
       return index; 
       break; 
      case 5: 
      if (address.getZipCode().equalsIgnoreCase(value)) 
       return index; 
       break; 
     }            //end switch 

     index++; 

    } 
    return -1; 
} 

Answer 1

我假設你的函數搜索試圖找到該用戶的輸入匹配它的一些領域的書，如果這是正確的，你爲什麼要使用交換機？

int search(List<SJAddressBook> addressBook) { 
    Scanner entry = new Scanner(System.in); 

    System.out 
      .println(" Search Menu;\n 1. First Name \n 2. Last Name \n 3. Street Address \n 4. City, State \n 5. Zip Code "); 
    System.out.println(); 
    System.out.print("Please enter Field to Search: "); 
    String menu = entry.next(); 
    System.out.println(); 
    System.out.print("Please enter Value to Search: "); 
    String value = entry.next(); 
    int index = 0; 
    for (SJAddressBook address : addressBook) // recieve ArrayList as 
               // argument 
     if (address.getFirstName().equalsIgnoreCase(value) || 
       address.getLastName().equalsIgnoreCase(value) || 
       address.getStreetAddress().equalsIgnoreCase(value) || 
       address.getCityState().equalsIgnoreCase(value) || 
       address.getZipCode().equalsIgnoreCase(value)){ 
       return index; 
     } 
     index ++; 
    } 

    return -1; 
} 

---

編輯 你帶開關功能（這裏沒有有用的，順便說一句）：

int search(List<SJAddressBook> addressBook) { 
    Scanner entry = new Scanner(System.in); 

    System.out 
      .println(" Search Menu;\n 1. First Name \n 2. Last Name \n 3. Street Address \n 4. City, State \n 5. Zip Code "); 
    System.out.println(); 
    System.out.print("Please enter Field to Search: "); 
    String menu = entry.next(); 
    System.out.println(); 
    System.out.print("Please enter Value to Search: "); 
    String value = entry.next(); 
    int index = 0; 
    for (SJAddressBook address : addressBook) // recieve ArrayList as 
     for(int i =0 ; i <= 5; i++){ 

      switch (index)         //intitialze switch 
      { 
       case 1: 
       if (address.getFirstName().equalsIgnoreCase(value)) 
        return index; 
        break; 
       case 2: 
       if (address.getLastName().equalsIgnoreCase(value)) 
        return index; 
        break; 
       case 3: 
       if (address.getStreetAddress().equalsIgnoreCase(value)) 
        return index; 
        break; 
       case 4: 
       if (address.getCityState().equalsIgnoreCase(value)) 
        return index; 
        break; 
       case 5: 
       if (address.getZipCode().equalsIgnoreCase(value)) 
        return index; 
        break; 
      } 
     } 

     index ++; 
    } 
    return -1; 
}