无法删除“ [”和“]”,并将List <string>返回给调用函数

时间:2018-11-17 19:15:09

标签: java

在下面的代码中,我试图检查用户输入的路径是否正确。如果输入的路径正确且正确,则下面的代码行将尝试使用BufferedReader打开该特定文件,读取该文件的内容,然后将内容传递回另一个函数以进行进一步处理。

示例:文件路径为“ C:\ Desktop \ A.txt”,并且A.txt包含ABCD EFGH,则“ ABCD EFGH”将被传递回调用函数(即,调用文件内容的函数如下所示)

目前,以下代码正在传回“ ABCD EFGH”。但是,它以以下方式通过:[ABCD EFGH]。无论如何,是否有必要删除括号并仅以ABCD EFGH的形式传递字符串

public static void main(String[] args) throws FileNotFoundException 
{
      Sample();
}

public static void Sample ()
{   

      String filename = "C:\\Desktop\\A.txt";

      //This will call filecontents function - Value returned from filecontents function will be stored in 'content'
      List<String> content = filecontents (filename);   

      //Converting List String to String since my next function accepts Strings only and not List<String>
      String[] strarray = content.toArray(new String[0]);
      String Statement = (Arrays.toString(strarray));
      System.out.println("X:"+Statement);   

}

private static List<String> filecontents(String file)
{

    Path path = Paths.get(file);
    if (Files.exists(path))
    {       
          List<String> records = new ArrayList<String>();
          try
          {
            //Open the text file
            BufferedReader reader = new BufferedReader(new FileReader(file));
            String line;
            while ((line = reader.readLine()) != null)
            {
              records.add(line);
            }
            for (String s : records)
            System.out.println("Record:"+s);
            reader.close();
            return records;

          }
          catch (Exception e)
          {
            System.err.format("Exception occurred trying to read '%s'.", file);
            e.printStackTrace();
          }
        } else
        {
            System.out.println("Filename is not correct. Exiting.");
        }
    return null; 

}

0 个答案:

没有答案