[Java] 讀取輸入類別使用&輸出入例外IOException

InputStreamReader     ir = new InputStreamReder(System.in);
BufferedReader          br = new BufferedReader(ir);

String fileName;
try{
    
      fileName = br.readLine();
}catch(IOException e)   //輸出入處理錯誤例外
{
    System.out.println(e);
}