A Reader/Writer are designed for character-oriented streams. If the information we are reading is all text, then the Reader will take care of character decoding for you. For example, you can read all in text file to represent the characters in Java.
An InputStream/OutStream are designed for byte-oriented streams. It grabs/writes the data byte by byte without performing any kind of translation. For example, you can read/write image data, mp3…or any binary files.
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