File	Doc	Category	Size	Date	Package
InputStreamReader.java	API Doc	J2ME CLDC 1.1	5534	Wed Feb 05 15:55:58 GMT 2003	java.io

InputStreamReader

• java.lang.Object
  • java.io.Reader

Fields Summary
private Reader	in The underlying character input stream.

Constructors Summary
public InputStreamReader(InputStream is) Create an InputStreamReader that uses the default character encoding. param is An InputStream in = Helper.getStreamReader(is);
public InputStreamReader(InputStream is, String enc) Create an InputStreamReader that uses the named character encoding. param is An InputStream param enc The name of a supported character encoding exception UnsupportedEncodingException If the named encoding is not supported in = Helper.getStreamReader(is, enc);

Methods Summary
public void	close() Close the stream. Closing a previously closed stream has no effect. exception IOException If an I/O error occurs if (in != null) { in.close(); in = null; }
private void	ensureOpen() Check to make sure that the stream has not been closed if (in == null) { throw new IOException("Stream closed"); }
public void	mark(int readAheadLimit) Mark the present position in the stream. param readAheadLimit Limit on the number of characters that may be read while still preserving the mark. After reading this many characters, attempting to reset the stream may fail. exception IOException If the stream does not support mark(), or if some other I/O error occurs ensureOpen(); if (in.markSupported()) { in.mark(readAheadLimit); } else { throw new IOException("mark() not supported"); }
public boolean	markSupported() Tell whether this stream supports the mark() operation. return true if and only if this stream supports the mark operation. if (in == null) { return false; } return in.markSupported();
public int	read() Read a single character. return The character read, or -1 if the end of the stream has been reached exception IOException If an I/O error occurs ensureOpen(); return in.read();
public int	read(char[] cbuf, int off, int len) Read characters into a portion of an array. param cbuf Destination buffer param off Offset at which to start storing characters param len Maximum number of characters to read return The number of characters read, or -1 if the end of the stream has been reached exception IOException If an I/O error occurs ensureOpen(); if ((off < 0) || (off > cbuf.length) || (len < 0) || ((off + len) > cbuf.length) || ((off + len) < 0)) { throw new IndexOutOfBoundsException(); } else if (len == 0) { return 0; } return in.read(cbuf, off, len);
public boolean	ready() Tell whether this stream is ready to be read. return True if the next read() is guaranteed not to block for input, false otherwise. Note that returning false does not guarantee that the next read will block. exception IOException If an I/O error occurs ensureOpen(); return in.ready();
public void	reset() Reset the stream. exception IOException If an I/O error occurs ensureOpen(); in.reset();
public long	skip(long n) Skip characters. param n The number of characters to skip return The number of characters actually skipped exception IllegalArgumentException If n is negative. exception IOException If an I/O error occurs ensureOpen(); return in.skip(n);