IO
IO按操作对象分类
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缓冲操作:BufferedInputStream、BufferedOutputStream、BufferedReader、BufferedWriter
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文件操作:FileInputStream、FileOutputStream、FileReader、FileWriter
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管道操作:PipedInputStream、PipedOutputStream、PipedReader、PipedWriter
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数组操作:ByteArrayInputStream、ByteArrayOutputStream、CharArrayReader、CharArrayWriter
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基本数据类型操作:DataInputStream、DataOutputStream
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对象序列化操作:ObjectInputStream、ObjectOutputStream
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转化控制:InputStreamReader、OutputStreamWriter
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打印控制:PrintWriter、PrintStream