PushbackReader JDK 1.6)

Methods

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public void close () throws IOException [Overrides FilterReader] [Specified in Reader]

Closes the stream and releases any system resources associated with it.

public void mark (int readAheadLimit) throws IOException [Overrides FilterReader]

Marks the present position in the stream.

Marks the present position in the stream. The mark
for class PushbackReader always throws an exception.
Throws:
- IOException - Always, since mark is not supported

public boolean markSupported () [Overrides FilterReader]

Tells whether this stream supports the mark() operation, which it does not.

public int read () throws IOException [Overrides FilterReader]

Reads a single character.

public int read (char[] cbuf) throws IOException [Inherited From Reader]

Reads characters into an array.

public int read (char[] cbuf, int off, int len) throws IOException [Overrides FilterReader] [Specified in Reader]

Reads characters into a portion of an array.

public int read (CharBuffer target) throws IOException [Inherited From Reader]

Attempts to read characters into the specified character buffer.

public boolean ready () throws IOException [Overrides FilterReader]

Tells whether this stream is ready to be read.

public void reset () throws IOException [Overrides FilterReader]

Resets the stream.

Resets the stream. The reset method of
PushbackReader always throws an exception.
Throws:
- IOException - Always, since reset is not supported

public long skip (long n) throws IOException [Overrides FilterReader]

Skips characters.

Skips characters. This method will block until some characters are
available, an I/O error occurs, or the end of the stream is reached.
Returns: The number of characters actually skipped
Parameters:
- n - The number of characters to skip
Throws:
- IllegalArgumentException - If n is negative.
- IOException - If an I/O error occurs

public void unread (char[] cbuf) throws IOException

Pushes back an array of characters by copying it to the front of the pushback buffer.

Pushes back an array of characters by copying it to the front of the
pushback buffer. After this method returns, the next character to be
read will have the value cbuf[0], the character after that
will have the value cbuf[1], and so forth.
Parameters:
- cbuf - Character array to push back
Throws:
- IOException - If there is insufficient room in the pushback buffer, or if some other I/O error occurs

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

Pushes back a portion of an array of characters by copying it to the front of the pushback buffer.

Pushes back a portion of an array of characters by copying it to the
front of the pushback buffer. After this method returns, the next
character to be read will have the value cbuf[off], the
character after that will have the value cbuf[off+1], and
so forth.
Parameters:
- cbuf - Character array
- off - Offset of first character to push back
- len - Number of characters to push back
Throws:
- IOException - If there is insufficient room in the pushback buffer, or if some other I/O error occurs

public void unread (int c) throws IOException

Pushes back a single character by copying it to the front of the pushback buffer.

Pushes back a single character by copying it to the front of the
pushback buffer. After this method returns, the next character to be read
will have the value (char)c.
Parameters:
- c - The int value representing a character to be pushed back
Throws:
- IOException - If the pushback buffer is full, or if some other I/O error occurs