如何從src文件夾中將文件加載到ArrayList

我一直在嘗試很多事情，而我只是準備請求一些幫助。如果這是不夠的信息，請讓我知道。我試過Scanner,BufferReader等搜索帖子沒有運氣。如何從src文件夾中將文件加載到ArrayList

我的文件words.txt就在src目錄中。

 
    import java.io.File; 
    import java.util.ArrayList; 
    import java.util.Random; 
    import java.util.Scanner; 


    /* 
    * CLASS THAT HANDLES GETTING AND SETTING THE SECRET WORD RANDOMLY 
    */ 

    public class secretWord { 
     private ArrayList theWordList; 
     private Scanner scanner; //Used to read the file into the array 
     private Random random; //Generates a random number index for choosing a random array element 
     private int randomIndex; //Holds the random index generated 
     ArrayList theSecretWord= new ArrayList(); //The secret word converted to char[] for use in the program 
     String tempSecretWord; //Secret word selected as string 

     //Constructor: runs methods to create arraylist of words then select a random element for thesecretword 
     public secretWord(){ 
      createArray(); 
      getSecretWord(); 
     } 
     //Creates an ArrayList of words from file 
     private void createArray(){ 
      theWordList= new ArrayList(); 
      String file= getClass().getResource("words.txt").getPath(); 
      File f= new File(file); 
      try{ 
      Scanner scanner= new Scanner(f); 

      while(scanner.hasNext()){ 
       theWordList.add(scanner.nextLine()); 
      } 

      }catch(Exception e){ 
       e.printStackTrace(); 
      }finally{ 
       scanner.close(); 
      } 
     } 
     //Selects a random number from the ArrayList to use as the secret word 
     private void getSecretWord(){ 
      random= new Random(); 
      randomIndex= random.nextInt(theWordList.size()); 
      theSecretWord.add(theWordList.get(randomIndex).toUpperCase()); 
     } 
     //Removes the secretWord and gets a new one for another play 
     void refreshWord(){ 
      theSecretWord.clear(); 
      getSecretWord(); 
     } 
    }

來源

2013-07-12 user2576739

異常在secretWord.createArray（secretWord.java:27）線程「主」顯示java.lang.NullPointerException \t \t 在secretWord中。（secretWord.java:21） \t at theFrame。（theFrame.java:33） \t at theGame.main（theGame.java:6） – user2576739

當我使用Scanner scanner = new Scanner（new File（words.txt））;我得到文件未找到異常。 – user2576739

使用頂級ContextClassLoader來獲取文件。

 InputStream inStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("words.txt"); 
    Scanner in = new Scanner(inStream);

來源

2013-07-12 16:17:32 bsd

這解決了這個問題！謝謝你的幫助！ – user2576739

使用此代碼行：

String file= getClass().getResource("words.txt").getFile();

注意路徑和文件之間的差異。並且用大寫字母開始你的Java類名，這是一個慣例。

來源

2013-07-12 16:30:05 winne2

如何從src文件夾中將文件加載到ArrayList

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