java - 尝试在 Selenium 中读取跨度之间的文本时出现数字格式异常

Question

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I am trying to read numbers in brackets '()' using selenium

HTML 代码为

<span class="refinement-count"> (14)</span>

我正在尝试读取跨度之间的数字。

使用selenium，括号中的值存储在字符串中。读取这些值后，我想添加所有这些值。我使用 split 函数并将其解析为整数，但 Integer.parseInt() 抛出以下异常:

Exception in thread "main" java.lang.NumberFormatException: For input string: ""

代码如下:

public static void convert(String s){
     int sum=0;
     String str[]=s.split("[()]+");
     int[] numbers=new int[str.length];

     for (int i = 0; i < str.length; i++)
     {    //System.out.println(str[i]);  --checked here, printing normal integers

          numbers[i]=Integer.parseInt(str[i].trim());
          sum=sum+numbers[i];
     }
     System.out.println("the sum of products is "+sum);
}

使用 try-catch() block 可以捕获异常，但输出并不理想。
帮助

已修改

从1开始循环时，是打印/输出

 the sum of products is 14
 the sum of products is 8
 the sum of products is 8
 the sum of products is 6
 the sum of products is 4
 the sum of products is 3
 the sum of products is 2
 the sum of products is 2
 the sum of products is 1
 the sum of products is 1
 the sum of products is 1
 the sum of products is 1
 the sum of products is 1
 the sum of products is 1
 the sum of products is 1  

仍然有总和不起作用

Answer 1

看来大家的评论都是对的，为什么不通过执行以下操作来避免这种情况:

 for (int i = 0; i < str.length; i++)
 {    //System.out.println(str[i]);  --checked her, printing normal integers
      String numStr = str[i].trim();
      if(numStr != "")
      {
          numbers[i]=Integer.parseInt(numStr);
          sum=sum+numbers[i];
      }
 }
 System.out.println("the sum of products is "+sum);