java对文件进行迭代，即使文件在目录中也会出现“未找到文件”异常。你能告诉我为什么吗？谢谢

Question

public static void main(String[] args) 
{
    try
    {
        File dir = new File("D:\\WayneProject\\Logs");

        if(dir.isDirectory())
        {   
            for(File child: dir.listFiles()) //NOT WORKING AFTER 1 ITERATION
            {
                if(child.isFile())
                {
                    String currentFile = child.getName();
                    String[] fileOutput = currentFile.split("\\.");
                    processFile(currentFile,fileOutput[0]);
                }
            }
        }
    }

请查看评论。对文件进行迭代，即使文件在目录中，也会出现“未找到文件”异常（对于第二次迭代）。你能告诉我为什么吗？谢谢

我的另一个功能。fileOutput用于设置目标文件的名称：

public static void processFile(String fileName, String fileOutput)
{
    try 
    {
        BufferedReader br = new BufferedReader(new FileReader(fileName));
        String str = null;

        File fileDest1 = new File("D:\\" + fileOutput + "1.csv");
        BufferedWriter wr1 = new BufferedWriter(new FileWriter(fileDest1));

        File fileDest2 = new File("D:\\" + fileOutput + "2.csv");
        BufferedWriter wr2 = new BufferedWriter(new FileWriter(fileDest2));

        wr1.write("Date, Memory Free\n");
        wr2.write("Date, %Idle\n");

        while((str=br.readLine()) != null)
        {
            String[] st = str.split("\\s+");  

        if (st[0].equals("MemFree:"))
        {
            wr1.write(st[1] + ",\n");
        }

        if(isDouble(st))
        {
            wr2.write(st[6] + "," + "\n");
        }

        if(isDate(st[0]))
        {
            String subStr = str.substring(0, 20);
            wr1.write(subStr + ",");
            wr2.write(subStr + ",");
        }

    }

        br.close();
        wr1.close();
        wr2.close();
    } 
    catch (FileNotFoundException e) 
    {
        e.printStackTrace();
    }
    catch(IOException e)
    {
        e.printStackTrace();
    }
}