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Class java.io.CharArrayReader

java.lang.Object | +----java.io.Reader | +----java.io.CharArrayReader
public class CharArrayReader
extends Reader
This class implements a character buffer that can be used as a character-input stream.

Variable Index

o buf
Character buffer
o count
Number of valid characters in buffer
o markedPos
Position of mark in buffer
o pos
Current buffer position

Constructor Index

o CharArrayReader(char[])
Create an CharArrayReader from the specified array of chars.
o CharArrayReader(char[], int, int)
Create an CharArrayReader from the specified array of chars.

Method Index

o close()
Close the stream.
o mark(int)
Mark the present position in the stream.
o markSupported()
Tell whether this stream supports the mark() operation, which it does.
o read()
Read a single character.
o read(char[], int, int)
Read characters into a portion of an array.
o ready()
Tell whether this stream is ready to be read.
o reset()
Reset the stream to the most recent mark, or to the beginning if it has never been marked.
o skip(long)
Skip characters.

Variables

o buf protected char buf[]
Character buffer

o pos protected int pos
Current buffer position

o markedPos protected int markedPos
Position of mark in buffer

o count protected int count
Number of valid characters in buffer

Constructors

o CharArrayReader public CharArrayReader(char buf[])
Create an CharArrayReader from the specified array of chars.

Parameters:
buf - Input buffer (not copied)
o 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

Methods

o read public int read() throws IOException
Read a single character.

Throws: IOException
If an I/O error occurs
Overrides:
read in class Reader
o 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
o 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
o 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
o markSupported public boolean markSupported()
Tell whether this stream supports the mark() operation, which it does.

Overrides:
markSupported in class Reader
o 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
o 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
o close public void close()
Close the stream.

Overrides:
close in class Reader
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