java IO & NIO

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IO.....

java.io.*

使用参考：http://www.cnblogs.com/rollenholt/archive/2011/09/11/2173787.html

类分层结构

java.lang.Object
- java.io.File (implements java.lang.Comparable<T>, java.io.Serializable)
- java.io.FileDescriptor
- java.io.InputStream (implements java.io.Closeable)
  - java.io.ByteArrayInputStream
  - java.io.FileInputStream
  - java.io.FilterInputStream
    - java.io.BufferedInputStream
    - java.io.DataInputStream (implements java.io.DataInput)
    - java.io.LineNumberInputStream
    - java.io.PushbackInputStream
  - java.io.ObjectInputStream (implements java.io.ObjectInput, java.io.ObjectStreamConstants)
  - java.io.PipedInputStream
  - java.io.SequenceInputStream
  - java.io.StringBufferInputStream
- java.io.ObjectInputStream.GetField
- java.io.ObjectOutputStream.PutField
- java.io.ObjectStreamClass (implements java.io.Serializable)
- java.io.ObjectStreamField (implements java.lang.Comparable<T>)
- java.io.OutputStream (implements java.io.Closeable, java.io.Flushable)
  - java.io.ByteArrayOutputStream
  - java.io.FileOutputStream
  - java.io.FilterOutputStream
    - java.io.BufferedOutputStream
    - java.io.DataOutputStream (implements java.io.DataOutput)
    - java.io.PrintStream (implements java.lang.Appendable, java.io.Closeable)
  - java.io.ObjectOutputStream (implements java.io.ObjectOutput, java.io.ObjectStreamConstants)
  - java.io.PipedOutputStream
- java.security.Permission (implements java.security.Guard, java.io.Serializable)
  - java.security.BasicPermission (implements java.io.Serializable)
    - java.io.SerializablePermission
  - java.io.FilePermission (implements java.io.Serializable)
- java.io.RandomAccessFile (implements java.io.Closeable, java.io.DataInput, java.io.DataOutput)
- java.io.Reader (implements java.io.Closeable, java.lang.Readable)
  - java.io.BufferedReader
    - java.io.LineNumberReader
  - java.io.CharArrayReader
  - java.io.FilterReader
    - java.io.PushbackReader
  - java.io.InputStreamReader
    - java.io.FileReader
  - java.io.PipedReader
  - java.io.StringReader
- java.io.StreamTokenizer
- java.lang.Throwable (implements java.io.Serializable)
  - java.lang.Exception
    - java.io.IOException
      - java.io.CharConversionException
      - java.io.EOFException
      - java.io.FileNotFoundException
      - java.io.InterruptedIOException
      - java.io.ObjectStreamException
        java.io.InvalidClassException
        java.io.InvalidObjectException
        java.io.NotActiveException
        java.io.NotSerializableException
        java.io.OptionalDataException
        java.io.StreamCorruptedException
        java.io.WriteAbortedException
      - java.io.SyncFailedException
      - java.io.UnsupportedEncodingException
      - java.io.UTFDataFormatException
- java.io.Writer (implements java.lang.Appendable, java.io.Closeable, java.io.Flushable)
  - java.io.BufferedWriter
  - java.io.CharArrayWriter
  - java.io.FilterWriter
  - java.io.OutputStreamWriter
    - java.io.FileWriter
  - java.io.PipedWriter
  - java.io.PrintWriter
  - java.io.StringWriter

接口分层结构

java.io.Closeable
java.io.DataInput
- java.io.ObjectInput
java.io.DataOutput
- java.io.ObjectOutput
java.io.FileFilter
java.io.FilenameFilter
java.io.Flushable
java.io.ObjectInputValidation
java.io.ObjectStreamConstants
java.io.Serializable
- java.io.Externalizable

NIO.....

java.nio.*

使用参考：http://www.cnblogs.com/rollenholt/archive/2011/09/29/2195730.html

类分层结构

java.lang.Object
- java.nio.Buffer
  - java.nio.ByteBuffer (implements java.lang.Comparable<T>)
    - java.nio.MappedByteBuffer
  - java.nio.CharBuffer (implements java.lang.Appendable, java.lang.CharSequence, java.lang.Comparable<T>, java.lang.Readable)
  - java.nio.DoubleBuffer (implements java.lang.Comparable<T>)
  - java.nio.FloatBuffer (implements java.lang.Comparable<T>)
  - java.nio.IntBuffer (implements java.lang.Comparable<T>)
  - java.nio.LongBuffer (implements java.lang.Comparable<T>)
  - java.nio.ShortBuffer (implements java.lang.Comparable<T>)
- java.nio.ByteOrder
- java.lang.Throwable (implements java.io.Serializable)
  - java.lang.Exception
    - java.lang.RuntimeException
      - java.nio.BufferOverflowException
      - java.nio.BufferUnderflowException
      - java.lang.IllegalStateException
        java.nio.InvalidMarkException
      - java.lang.UnsupportedOperationException
        java.nio.ReadOnlyBufferException