public class StringReader
extends java.io.Reader
Constructor and Description |
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StringReader(java.lang.String s)
Creates a new string reader.
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Modifier and Type | Method and Description |
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void |
close()
Closes the stream and releases any system resources associated with it.
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void |
mark(int readAheadLimit)
Marks the present position in the stream.
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boolean |
markSupported()
Tells whether this stream supports the mark() operation, which it does.
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int |
read()
Reads a single character.
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int |
read(char[] cbuf,
int off,
int len)
Reads characters into a portion of an array.
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boolean |
ready()
Tells whether this stream is ready to be read.
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void |
reset()
Resets the stream to the most recent mark, or to the beginning of the string if it has never been marked.
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long |
skip(long ns)
Skips the specified number of characters in the stream.
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public StringReader(java.lang.String s)
s
- String providing the character stream.public int read() throws java.io.IOException
read
in class java.io.Reader
IOException
- If an I/O error occurspublic int read(char[] cbuf, int off, int len) throws java.io.IOException
read
in class java.io.Reader
cbuf
- Destination bufferoff
- Offset at which to start writing characterslen
- Maximum number of characters to readIOException
- If an I/O error occurspublic long skip(long ns) throws java.io.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 java.io.Reader
IOException
- If an I/O error occurspublic boolean ready() throws java.io.IOException
ready
in class java.io.Reader
IOException
- If the stream is closedpublic boolean markSupported()
markSupported
in class java.io.Reader
public void mark(int readAheadLimit) throws java.io.IOException
mark
in class java.io.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.java.lang.IllegalArgumentException
- If readAheadLimit < 0
IOException
- If an I/O error occurspublic void reset() throws java.io.IOException
reset
in class java.io.Reader
IOException
- If an I/O error occurspublic void close()
close
in interface java.io.Closeable
close
in interface java.lang.AutoCloseable
close
in class java.io.Reader