Java compact1, compact2, compact3 java.io Class FilterReader（JDK8）

Field Detail

• in

  protected Reader in

  The underlying character-input stream.

Constructor Detail

• FilterReader

  protected FilterReader(Reader in)

  Creates a new filtered reader.

  Parameters:

  in - a Reader object providing the underlying stream.

  Throws:

  NullPointerException - if in is null

Method Detail

• read

  public int read()
           throws IOException

  Reads a single character.

  Overrides:

  read in class Reader

  Returns:

  The character read, as an integer in the range 0 to 65535 (0x00-0xffff), or -1 if the end of the stream has been reached

  Throws:

  IOException - If an I/O error occurs

• read

  public int read(char[] cbuf,
                  int off,
                  int len)
           throws IOException

  Reads characters into a portion of an array.

  Specified by:

  read in class Reader

  Parameters:

  cbuf - Destination buffer

  off - Offset at which to start storing characters

  len - Maximum number of characters to read

  Returns:

  The number of characters read, or -1 if the end of the stream has been reached

  Throws:

  IOException - If an I/O error occurs

• skip

  public long skip(long n)
            throws IOException

  Skips characters.

  Overrides:

  skip in class Reader

  Parameters:

  n - The number of characters to skip

  Returns:

  The number of characters actually skipped

  Throws:

  IOException - If an I/O error occurs

• ready

  public boolean ready()
                throws IOException

  Tells whether this stream is ready to be read.

  Overrides:

  ready in class Reader

  Returns:

  True if the next read() is guaranteed not to block for input, false otherwise. Note that returning false does not guarantee that the next read will block.

  Throws:

  IOException - If an I/O error occurs

• markSupported

  public boolean markSupported()

  Tells whether this stream supports the mark() operation.

  Overrides:

  markSupported in class Reader

  Returns:

  true if and only if this stream supports the mark operation.

• mark

  public void mark(int readAheadLimit)
            throws IOException

  Marks the present position in the stream.

  Overrides:

  mark in class Reader

  Parameters:

  readAheadLimit - Limit on the number of characters that may be read while still preserving the mark. After reading this many characters, attempting to reset the stream may fail.

  Throws:

  IOException - If an I/O error occurs

• reset

  public void reset()
             throws IOException

  Resets the stream.

  Overrides:

  reset in class Reader

  Throws:

  IOException - If an I/O error occurs

• close

  public void close()
             throws IOException

  Description copied from class: Reader
  Closes the stream and releases any system resources associated with it. Once the stream has been closed, further read(), ready(), mark(), reset(), or skip() invocations will throw an IOException. Closing a previously closed stream has no effect.

  Specified by:

  close in interface Closeable

  Specified by:

  close in interface AutoCloseable

  Specified by:

  close in class Reader

  Throws:

  IOException - If an I/O error occurs