java.io
Class FilterReader
java.lang.Object
|
+--java.io.Reader
|
+--java.io.FilterReader
- Direct Known Subclasses:
- PushbackReader
- public abstract class FilterReader
- extends Reader
Abstract class for reading filtered character streams.
- Since:
- JDK1.1
Field Summary |
protected Reader |
in
The underlying character-input stream, or null if the stream has been
closed. |
Method Summary |
void |
close()
Close the stream. |
void |
mark(int readAheadLimit)
Mark the present position in the stream. |
boolean |
markSupported()
Tell whether this stream supports the mark() operation. |
int |
read()
Read a single character. |
int |
read(char[] cbuf,
int off,
int len)
Read characters into a portion of an array. |
boolean |
ready()
Tell whether this stream is ready to be read. |
void |
reset()
Reset the stream. |
long |
skip(long n)
Skip characters. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
in
protected Reader in
- The underlying character-input stream, or null if the stream has been
closed.
FilterReader
protected FilterReader(Reader in)
- Create a new filtered reader.
- Parameters:
in
- a Reader object providing the underlying stream.
read
public int read()
throws IOException
- Read a single character.
- Overrides:
read
in class Reader
- Throws:
IOException
- If an I/O error occurs
read
public int read(char[] cbuf,
int off,
int len)
throws IOException
- Read characters into a portion of an array.
- Overrides:
read
in class Reader
- Throws:
IOException
- If an I/O error occurs
skip
public long skip(long n)
throws IOException
- Skip characters.
- Overrides:
skip
in class Reader
- Throws:
IOException
- If an I/O error occurs
ready
public boolean ready()
throws IOException
- Tell whether this stream is ready to be read.
- Overrides:
ready
in class Reader
- Throws:
IOException
- If an I/O error occurs
markSupported
public boolean markSupported()
- Tell whether this stream supports the mark() operation.
- Overrides:
markSupported
in class Reader
- Following copied from class:
java.io.Reader
- Returns:
- true if and only if this stream supports the mark operation.
mark
public void mark(int readAheadLimit)
throws IOException
- Mark the present position in the stream.
- Overrides:
mark
in class Reader
- Throws:
IOException
- If an I/O error occurs
reset
public void reset()
throws IOException
- Reset the stream.
- Overrides:
reset
in class Reader
- Throws:
IOException
- If an I/O error occurs
close
public void close()
throws IOException
- Close the stream.
- Overrides:
close
in class Reader
- Throws:
IOException
- If an I/O error occurs
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