问题已经决谢谢。

共享一下

    try
    {

    }catch(Exception e)
        {
            System.out.println("Trouble: " +e);
            sub(e.toString());
        }



    public void sub(String error)
    {
        try
        {
            BufferedWriter bw = new BufferedWriter(new FileWriter(fileName));
            bw.write(time.toString());
            bw.write("\r\n");
            bw.write(error);
            bw.close();
            
        }
            catch(IOException e)
            {
                System.out.println(e);
            }
    }