ArrayIndexOutOfBoundsException請幫助我

Question

我的Java代碼有問題。我試圖找出錯誤是什麼問題。也許你可以幫助我。

public static void Convert1() throws IOException,ArrayIndexOutOfBoundsException,NumberFormatException { 
    String csv ="/Users/Max/IdeaProjects/Download/Asset1.csv"; 
    BufferedReader br = null; 
    String line = ""; 
    String csvSplitBy = ";"; 

    File file = new File ("/Users/Max/IdeaProjects/Download/Datum1.csv"); 
    if (file.exists()) { 

    } else { 



     br = new BufferedReader(new FileReader(csv)); 
     while ((line = br.readLine()) != null) { 


       String[] asset = line.split(csvSplitBy); 


      String[] Date = {asset[0]}; //Datum 
      String[] Open = {asset[1]}; //Öffnungskurs 
      String[] High = {asset[2]}; //Tageshoch 
      String[] Low = {asset[3]}; //Tagestief 
      String[] Close = {asset[4]}; //Schlusskurs 
      String[] Volume = {asset[5]}; //Handelsvolumen 


      // Es werden die Dateien geschrieben die die einzelnen Teilbereiche enthalten 
      BufferedWriter BW = new BufferedWriter(new FileWriter("Datum1.csv", true)); 
      StringBuilder SB = new StringBuilder(); 
      for (String element : Date) { 
       SB.append(element); 
       SB.append(";"); 
      } 
      BW.write(SB.toString()); 
      BW.close(); 

      BufferedWriter BW2 = new BufferedWriter(new FileWriter("Öffnungskurs1.csv", true)); 
      StringBuilder SB2 = new StringBuilder(); 
      for (String element : Open) { 
       SB2.append(element); 
       SB2.append(";"); 
      } 
      BW2.write(SB2.toString()); 
      BW2.close(); 

      BufferedWriter BW3 = new BufferedWriter(new FileWriter("Tageshoch1.csv", true)); 
      StringBuilder SB3 = new StringBuilder(); 
      for (String element : High) { 
       SB3.append(element); 
       SB3.append(";"); 
      } 
      BW3.write(SB3.toString()); 
      BW3.close(); 

      BufferedWriter BW4 = new BufferedWriter(new FileWriter("Tagestief1.csv", true)); 
      StringBuilder SB4 = new StringBuilder(); 
      for (String element : Low) { 
       SB4.append(element); 
       SB4.append(";"); 
      } 
      BW4.write(SB4.toString()); 
      BW4.close(); 

      BufferedWriter BW5 = new BufferedWriter(new FileWriter("Schlusskurs1.csv", true)); 
      StringBuilder SB5 = new StringBuilder(); 
      for (String element : Close) { 
       SB5.append(element); 
       SB5.append(";"); 
      } 
      BW5.write(SB5.toString()); 
      BW5.close(); 

      BufferedWriter BW6 = new BufferedWriter(new FileWriter("Handelsvolumen1.csv", true)); 
      StringBuilder SB6 = new StringBuilder(); 
      for (String element : Volume) { 
       SB6.append(element); 
       SB6.append(";"); 
      } 
      BW6.write(SB6.toString()); 
      BW6.close(); 
     } 

    } 

} 

每次我想運行我得到以下異常。

異常線程 「main」 java.lang.ArrayIndexOutOfBoundsException：1 在ConvertCSVtoArraysAsset1.Convert1（ConvertCSVtoArraysAsset1.java:30）

也許你可以幫我這一點。

問候

Answer 1

通過你使用過數組索引和您的例外「1」的唯一場所，該錯誤可能是在這條線：

String[] Open = {asset[1]}; 

而這可能是因爲有而不是數組中的那些元素。

將這個線你String.split後，看看你的陣列是由，和它的長度：

System.out.println(Arrays.toString(asset));