從文件讀取數據（java）

Question

我有一個文件，我試圖收集數據，所以我可以將數據添加到對象創建，但它似乎並沒有工作，林不知道爲什麼。

這是試圖讀取數據的代碼：

private void loadEmployeesFromFile(String fileName) 
{ 
    File file = new File(fileName); 
    Scanner scan = null; 
    try { 
     scan = new Scanner(file); 
    } catch (FileNotFoundException e) { 
     e.printStackTrace(); 
    } 

    int counter = 0; 

    while(scan.hasNext()) 
    { 
     scan.nextLine(); 
     counter++; 
    } 
    scan.close(); 

    employees = new Employee[counter]; 
    Scanner fileScan = null; 
    try 
    { 
    fileScan = new Scanner(file).useDelimiter(","); 
    } 
    catch(FileNotFoundException e) 
    { 
     System.out.print("file was not found :/"); 
    } 
    for(int i = 0; i < 3; i++) 
    { 
     String id = fileScan.next(); 
     String firstName = fileScan.next(); 
     String lastName = fileScan.next(); 
     String hireDate = fileScan.next(); 
     int shift = fileScan.nextInt(); 
     double hourlyPayRate = 0; 
     double bonusRate = 0; 

     switch(id.substring(0, 2)) 
     { 
     case "PW": 
      if(fileScan.hasNextDouble()) 
       hourlyPayRate = fileScan.nextDouble(); 
      else if(fileScan.hasNextInt()) 
       hourlyPayRate = (double)fileScan.nextInt(); 
      employees[i] = new ProductionWorker(id, firstName, lastName, hireDate, shift, hourlyPayRate); 
      break; 
     case "TM": 
      if(fileScan.hasNextDouble()) 
       hourlyPayRate = fileScan.nextDouble(); 
      else if(fileScan.hasNextInt()) 
       hourlyPayRate = (double)fileScan.nextInt(); 
      if(fileScan.hasNextDouble()) 
       bonusRate = fileScan.nextDouble(); 
      else if(fileScan.hasNextInt()) 
       bonusRate = (double)fileScan.nextInt(); 
      double reqTrainingHrs = fileScan.nextDouble(); 
      double trainingHrsDone = fileScan.nextDouble(); 
      employees[i] = new TeamLeader(id, firstName, lastName, hireDate, shift, hourlyPayRate, bonusRate, reqTrainingHrs, trainingHrsDone); 
      break; 
     case "SU": 
      double annualSalary = fileScan.nextDouble(); 
      bonusRate = fileScan.nextDouble(); 
      employees[i] = new ShiftSupervisor(id, firstName, lastName, hireDate, shift, annualSalary, bonusRate); 
      break; 
     } 
    } 

    fileScan.close(); 
} 

這個數據文件：

PW_1234,James,Bond,01/02/10,1,10 
    PW_1235,John,Brown,02/03/10,2,10.5 
    PW_1236,Howard,Johnson,03/04/10,3,11 
    PW_1237,Francis,Themule,04/05/11,4,10.75 
    PW_1238,Mathew,Lewis,05/06/11,1,12.75 
    PW_1239,Mark,Bixton,05/13/11,2,13 
    PW_1242,Sarah,Glover,05/14/11,1,13.75 
    PW_1245,John,Doe,05/15/11,4,10.5 
    PW_1245,Mary,Doe,05/15/11,4,10.5 
    TL_1248,Abel,English,05/16/11,3,16.5,0.01,100,89 
    TL_1251,Eustis,Clauser,05/17/11,2,16,0.02,100,9 
    SU_1254,Henry,Hollowman,05/18/11,1,40000,0.01 
    PW_1240,Luke,Sailor,01/22/12,3,14.5 
    PW_1243,Jane,Baker,01/23/12,2,14 
    PW_1243,Jane,Baker,01/23/12,2,14 
    TL_1246,David,Brief,01/24/12,1,14.75,0.01,100,57 
    PW_1246,David,Doson,01/24/12,1,14.75 
    TL_1249,Baker,Anderson,01/25/12,4,11.5,0.01,100,100 
    TL_1252,Frank,Donson,01/26/12,3,17.5,0.02,100,39 
    SU_1255,Issac,Asimov,01/27/12,2,43000,0.02 
    SU_1256,Issac,Shoreman,01/28/12,3,39000,0.01 
    SU_1257,Issac,Roberts,01/29/12,4,35500,0.01 
    PW_1241,John,Candy,11/23/13,4,9.5 
    PW_1244,Kate,Smith,11/24/13,3,15.5 
    PW_1244,Kate,Handle,11/24/13,3,15.5 
    TL_1247,Samual,Dempky,11/25/13,2,15,0.01,100,10 
    TL_1250,Charley,Boman,11/26/13,1,15.75,0.01,100,50 
    TL_1253,George,Fritzmen,11/27/13,4,12.5,0.02,100,27 

對於當它到達TL_1251一些奇怪的原因，它讀取的名字後，立即跳到試圖閱讀輪班。

這是生成該錯誤：

Exception in thread "AWT-EventQueue-0" java.util.InputMismatchException 
at java.util.Scanner.throwFor(Unknown Source) 
at java.util.Scanner.next(Unknown Source) 
at java.util.Scanner.nextInt(Unknown Source) 
at java.util.Scanner.nextInt(Unknown Source) 
at assignment3.FactoryEmployees.loadEmployeesFromFile(FactoryEmployees.java:244) 
at assignment3.FactoryEmployees.<init>(FactoryEmployees.java:43) 
at assignment3.FactoryEmployees$1.run(FactoryEmployees.java:403) 
at java.awt.event.InvocationEvent.dispatch(Unknown Source) 
at java.awt.EventQueue.dispatchEventImpl(Unknown Source) 
at java.awt.EventQueue.access$500(Unknown Source) 
at java.awt.EventQueue$3.run(Unknown Source) 
at java.awt.EventQueue$3.run(Unknown Source) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) 
at java.awt.EventQueue.dispatchEvent(Unknown Source) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) 
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) 
at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
at java.awt.EventDispatchThread.pumpEvents(Unknown Source) 
at java.awt.EventDispatchThread.run(Unknown Source) 

線244

int shift = fileScan.nextInt(); 

當限制迴路只能運行三次，只打印移和起來，我得到

PW_1234 
    James 
    Bond 
    01/02/10 
    1 
    10 
    PW_1235 
    John 
    Brown 
    02/03/10 
    2 
    10.5 
    PW_1236 
    Howard 
    Johnson 
    03/04/10 
    3 

奇怪的是，它結束打印我沒有編碼打印的hourlyPayRate但

Answer 1

看起來像你有一個錯字。嘗試更改case "TM"至case "TL"。