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TextIO (Serializable (serialVersionUID (default (:question:should we…

- - - - all elms in the arrays are serializable, then the array can call writeObject
  - - - :question:should we define the UID by our own
        
        define by our own
        
        ok to restore even after modification
- - - - FileInputStream / FileOutputStream
        
        construct
        
        public (String filename)
        public (File file)
        
        (String filename, boolean append)
        (File file, boolean append)
      - DataInputStream / DataOutputStream
        
        extends FileInputStream / FileOutputStream
        
        DIS infile = new DIS(new FIS("in.bat"));
        
        EOFException
      - FilterInputStream / FilterOutputStream
        
        :one:BufferedInputStream / BufferedOutputStream
      - FilterInputStream 与装饰者模式
        
        用一个类去装饰(增强)另一个类
  - - - :two:Writer
      - :one:Reader