Class: java.io.StringReader

  • public class StringReader
  • extends Reader
A character stream whose source is a string.
Authors:
@author Mark Reinhold
Version:
@version 1.24, 04/02/19
Since:
@since JDK1.1

Inheritance

Superclass tree: Implements:

Methods

  • StringReadertop

    public StringReader(String s)
    Create a new string reader.
    Parameters:
    @param s String providing the character stream.
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  • closetop

    public void close()
    Close the stream.
    Specified by:
    close from Closeable
    Override hierarchy:
    close from Reader
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  • marktop

    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:
    @param 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.
    Exceptions:
    @exception IllegalArgumentException If readAheadLimit is < 0
    @exception IOException If an I/O error occurs
    Override hierarchy:
    mark from Reader
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  • markSupportedtop

    public boolean markSupported()
    Tell whether this stream supports the mark() operation, which it does.
    Return:
    @return true if and only if this stream supports the mark operation.
    Override hierarchy:
    markSupported from Reader
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  • readtop

    public int read() throws IOException
    Read a single character.
    Return:
    @return The character read, or -1 if the end of the stream has been reached
    Exceptions:
    @exception IOException If an I/O error occurs
    Override hierarchy:
    read from Reader
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  • readtop

    public int read(char[] cbuf, int off, int len) throws IOException
    Read characters into a portion of an array.
    Parameters:
    @param cbuf Destination buffer
    @param off Offset at which to start writing characters
    @param len Maximum number of characters to read
    Return:
    @return The number of characters read, or -1 if the end of the stream has been reached
    Exceptions:
    @exception IOException If an I/O error occurs
    Override hierarchy:
    read from Reader
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  • readytop

    public boolean ready() throws IOException
    Tell whether this stream is ready to be read.
    Return:
    @return True if the next read() is guaranteed not to block for input
    Exceptions:
    @exception IOException If the stream is closed
    Override hierarchy:
    ready from Reader
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  • resettop

    public void reset() throws IOException
    Reset the stream to the most recent mark, or to the beginning of the string if it has never been marked.
    Exceptions:
    @exception IOException If an I/O error occurs
    Override hierarchy:
    reset from Reader
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  • skiptop

    public long skip(long ns) throws IOException
    Skips the specified number of characters in the stream. Returns the number of characters that were skipped.

    The ns parameter may be negative, even though the skip method of the java.io.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.

    Return:
    @return The number of characters actually skipped
    Exceptions:
    @exception IOException If an I/O error occurs
    Override hierarchy:
    skip from Reader
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