java - 如何防止此 Java 代码中出现 IndexOutOfBoundsException 错误？

Question

基本上，当数组列表中没有更多记录可显示时，我只想收到一条错误消息。我需要调整什么？

         public void nextRecord()
          { 

           if(records.size() > 0)
           {
              recordCount++;
              if(records.get(recordCount) != null)
              {
                 String[] array = records.get(recordCount).split(",");
                 String item = array[0].trim().replaceAll("\"", "");
                 String number = array[1].trim();
                 String cost = array[2].trim();
                 String amnt = array[3].trim();

                 txtItem.setText(item);
                 txtNumber.setText(number);
                 txtCost.setText(cost);
                 txtAmount.setText(amnt);
              } 

           }
           else if (records.get(recordCount) == null)
           {
              JOptionPane.showMessa

Answer 1

在调用 get() 之前检查 arrayList 的大小，例如，

if(recordCount< records.size() && records.get(recordCount) != null)
 {
    //Do the processing
 } else {
    JOptionPane.showMessa
 }