Class java.io.CharArrayReader
java.lang.Object
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+----java.io.Reader
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+----java.io.CharArrayReader
- public class CharArrayReader
- extends Reader
This class implements a character buffer that can be used as a
character-input stream.
- Since:
- JDK1.1
Field Summary
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char[]
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buf
Character buffer
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int
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count
Number of valid characters in buffer
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int
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markedPos
Position of mark in buffer
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int
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pos
Current buffer position
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Constructor Summary
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CharArrayReader(char[] buf)
Create an CharArrayReader from the specified array of chars.
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CharArrayReader(char[] buf,
int offset,
int length)
Create an CharArrayReader from the specified array of chars.
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Method Summary
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void
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close()
Close the stream.
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void
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mark(int readAheadLimit)
Mark the present position in the stream.
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boolean
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markSupported()
Tell whether this stream supports the mark() operation, which it does.
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int
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read()
Read a single character.
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int
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read(char[] b,
int off,
int len)
Read characters into a portion of an array.
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boolean
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ready()
Tell whether this stream is ready to be read.
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void
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reset()
Reset the stream to the most recent mark, or to the beginning if it has
never been marked.
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long
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skip(long n)
Skip characters.
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Methods inherited from class java.lang.Object
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
buf
protected char[] buf
- Character buffer
pos
protected int pos
- Current buffer position
markedPos
protected int markedPos
- Position of mark in buffer
count
protected int count
- Number of valid characters in buffer
CharArrayReader
public CharArrayReader(char[] buf)
- Create an CharArrayReader from the specified array of chars.
- Parameters:
buf
- Input buffer (not copied)
CharArrayReader
public CharArrayReader(char[] buf,
int offset,
int length)
- Create an CharArrayReader from the specified array of chars.
- Parameters:
buf
- Input buffer (not copied)
offset
- Offset of the first char to read
length
- Number of chars to read
read
public int read() throws IOException
- Read a single character.
- Throws:
- IOException - If an I/O error occurs
- Overrides:
- read in class Reader
read
public int read(char[] b,
int off,
int len) throws IOException
- Read characters into a portion of an array.
- Parameters:
b
- Destination buffer
off
- Offset at which to start storing characters
len
- Maximum number of characters to read
- Returns:
- The actual number of characters read, or -1 if
the end of the stream has been reached
- Throws:
- IOException - If an I/O error occurs
- Overrides:
- read in class Reader
skip
public long skip(long n) throws IOException
- Skip characters.
- Parameters:
n
- The number of characters to skip
- Returns:
- The number of characters actually skipped
- Throws:
- IOException - If an I/O error occurs
- Overrides:
- skip in class Reader
ready
public boolean ready() throws IOException
- Tell whether this stream is ready to be read. Character-array readers
are always ready to be read.
- Throws:
- IOException - If an I/O error occurs
- Overrides:
- ready in class Reader
markSupported
public boolean markSupported()
- Tell whether this stream supports the mark() operation, which it does.
- Overrides:
- markSupported in class Reader
mark
public void mark(int readAheadLimit) throws IOException
- Mark the present position in the stream. Subsequent calls to reset()
will reposition the stream to this point.
- Parameters:
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.
- Throws:
- IOException - If an I/O error occurs
- Overrides:
- mark in class Reader
reset
public void reset() throws IOException
- Reset the stream to the most recent mark, or to the beginning if it has
never been marked.
- Throws:
- IOException - If an I/O error occurs
- Overrides:
- reset in class Reader
close
public void close()
- Close the stream.
- Overrides:
- close in class Reader
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