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Java™ Platform Standard Ed. 6 |
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java.lang.Object java.io.Reader java.io.StringReader
public class StringReader
A character stream whose source is a string.
Field Summary |
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Fields inherited from class java.io.Reader |
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lock |
Constructor Summary | |
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StringReader(String s)
Creates a new string reader. |
Method Summary | |
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void |
close()
Closes the stream and releases any system resources associated with it. |
void |
mark(int readAheadLimit)
Marks the present position in the stream. |
boolean |
markSupported()
Tells whether this stream supports the mark() operation, which it does. |
int |
read()
Reads a single character. |
int |
read(char[] cbuf,
int off,
int len)
Reads characters into a portion of an array. |
boolean |
ready()
Tells whether this stream is ready to be read. |
void |
reset()
Resets the stream to the most recent mark, or to the beginning of the string if it has never been marked. |
long |
skip(long ns)
Skips the specified number of characters in the stream. |
Methods inherited from class java.io.Reader |
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read, read |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public StringReader(String s)
s
- String providing the character stream.Method Detail |
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public int read() throws IOException
read
in class Reader
IOException
- If an I/O error occurspublic int read(char[] cbuf, int off, int len) throws IOException
read
in class Reader
cbuf
- Destination bufferoff
- Offset at which to start writing characterslen
- Maximum number of characters to read
IOException
- If an I/O error occurspublic long skip(long ns) throws IOException
The ns
parameter may be negative, even though the
skip
method of the Reader
superclass throws
an exception in this case. Negative values of ns
cause the
stream to skip backwards. Negative return values indicate a skip
backwards. It is not possible to skip backwards past the beginning of
the string.
If the entire string has been read or skipped, then this method has no effect and always returns 0.
skip
in class Reader
ns
- The number of characters to skip
IOException
- If an I/O error occurspublic boolean ready() throws IOException
ready
in class Reader
IOException
- If the stream is closedpublic boolean markSupported()
markSupported
in class Reader
public void mark(int readAheadLimit) throws IOException
mark
in class Reader
readAheadLimit
- Limit on the number of characters that may be
read while still preserving the mark. Because
the stream's input comes from a string, there
is no actual limit, so this argument must not
be negative, but is otherwise ignored.
IllegalArgumentException
- If readAheadLimit is < 0
IOException
- If an I/O error occurspublic void reset() throws IOException
reset
in class Reader
IOException
- If an I/O error occurspublic void close()
close
in interface Closeable
close
in class Reader
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Java™ Platform Standard Ed. 6 |
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