java.lang.Object | ||
↳ | java.io.Reader | |
↳ | java.io.CharArrayReader |
This class implements a character buffer that can be used as a character-input stream.
Fields | |||||||||||
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buf | The character buffer. | ||||||||||
count | The index of the end of this buffer. | ||||||||||
markedPos | The position of mark in buffer. | ||||||||||
pos | The current buffer position. |
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Inherited Fields | |||||||||||
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From class
java.io.Reader
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Public Constructors | |||||||||||
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Creates a CharArrayReader from the specified array of chars.
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Creates a CharArrayReader from the specified array of chars.
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Public Methods | |||||||||||
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Closes the stream and releases any system resources associated with
it.
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Marks the present position in the stream.
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Tells whether this stream supports the mark() operation, which it does.
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Reads a single character.
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Reads characters into a portion of an array.
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Tells whether this stream is ready to be read.
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Resets the stream to the most recent mark, or to the beginning if it has
never been marked.
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Skips characters.
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Inherited Methods | |||||||||||
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From class
java.io.Reader
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From class
java.lang.Object
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From interface
java.io.Closeable
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From interface
java.lang.Readable
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The character buffer.
The index of the end of this buffer. There is not valid data at or beyond this index.
The position of mark in buffer.
The current buffer position.
Creates a CharArrayReader from the specified array of chars.
buf | Input buffer (not copied) |
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Creates a CharArrayReader from the specified array of chars.
The resulting reader will start reading at the given offset. The total number of char values that can be read from this reader will be either length or buf.length-offset, whichever is smaller.
buf | Input buffer (not copied) |
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offset | Offset of the first char to read |
length | Number of chars to read |
IllegalArgumentException | If offset is negative or greater than buf.length, or if length is negative, or if the sum of these two values is negative. |
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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.
Marks the present position in the stream. Subsequent calls to reset() will reposition the stream to this point.
readAheadLimit | Limit on the number of characters that may be read while still preserving the mark. Because the stream's input comes from a character array, there is no actual limit; hence this argument is ignored. |
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IOException | If an I/O error occurs |
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Tells whether this stream supports the mark() operation, which it does.
Reads a single character.
IOException | If an I/O error occurs |
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Reads characters into a portion of an array.
b | Destination buffer |
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off | Offset at which to start storing characters |
len | Maximum number of characters to read |
IOException | If an I/O error occurs |
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Tells whether this stream is ready to be read. Character-array readers are always ready to be read.
IOException | If an I/O error occurs |
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Resets the stream to the most recent mark, or to the beginning if it has never been marked.
IOException | If an I/O error occurs |
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Skips characters. Returns the number of characters that were skipped.
The n
parameter may be negative, even though the
skip
method of the Reader
superclass throws
an exception in this case. If n
is negative, then
this method does nothing and returns 0
.
n | The number of characters to skip |
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IOException | If the stream is closed, or an I/O error occurs |
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