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jdk.io.InputStreamReader

An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset. The charset that it uses may be specified by name or may be given explicitly, or the platform's default charset may be accepted.

Each invocation of one of an InputStreamReader's read() methods may cause one or more bytes to be read from the underlying byte-input stream. To enable the efficient conversion of bytes to characters, more bytes may be read ahead from the underlying stream than are necessary to satisfy the current read operation.

For top efficiency, consider wrapping an InputStreamReader within a BufferedReader. For example:

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

An InputStreamReader is a bridge from byte streams to character streams: It
reads bytes and decodes them into characters using a specified charset.  The charset that it uses
may be specified by name or may be given explicitly, or the platform's
default charset may be accepted.

 Each invocation of one of an InputStreamReader's read() methods may
cause one or more bytes to be read from the underlying byte-input stream.
To enable the efficient conversion of bytes to characters, more bytes may
be read ahead from the underlying stream than are necessary to satisfy the
current read operation.

 For top efficiency, consider wrapping an InputStreamReader within a
BufferedReader.  For example:



BufferedReader in
  = new BufferedReader(new InputStreamReader(System.in));
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->input-stream-readerclj

(->input-stream-reader in)
(->input-stream-reader in charset-name)

Constructor.

Creates an InputStreamReader that uses the named charset.

in - An InputStream - java.io.InputStream charset-name - The name of a supported charset - java.lang.String

throws: java.io.UnsupportedEncodingException - If the named charset is not supported

Constructor.

Creates an InputStreamReader that uses the named charset.

in - An InputStream - `java.io.InputStream`
charset-name - The name of a supported charset - `java.lang.String`

throws: java.io.UnsupportedEncodingException - If the named charset is not supported
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closeclj

(close this)

Description copied from class: Reader

throws: java.io.IOException - If an I/O error occurs

Description copied from class: Reader

throws: java.io.IOException - If an I/O error occurs
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get-encodingclj

(get-encoding this)

Returns the name of the character encoding being used by this stream.

If the encoding has an historical name then that name is returned; otherwise the encoding's canonical name is returned.

If this instance was created with the InputStreamReader(InputStream, String) constructor then the returned name, being unique for the encoding, may differ from the name passed to the constructor. This method will return null if the stream has been closed.

returns: The historical name of this encoding, or null if the stream has been closed - java.lang.String

Returns the name of the character encoding being used by this stream.

  If the encoding has an historical name then that name is returned;
 otherwise the encoding's canonical name is returned.

  If this instance was created with the InputStreamReader(InputStream, String) constructor then the returned
 name, being unique for the encoding, may differ from the name passed to
 the constructor. This method will return null if the
 stream has been closed.

returns: The historical name of this encoding, or
         null if the stream has been closed - `java.lang.String`
raw docstring

readclj

(read this)
(read this cbuf offset length)

Reads characters into a portion of an array.

cbuf - Destination buffer - char[] offset - Offset at which to start storing characters - int length - Maximum number of characters to read - int

returns: The number of characters read, or -1 if the end of the stream has been reached - int

throws: java.io.IOException - If an I/O error occurs

Reads characters into a portion of an array.

cbuf - Destination buffer - `char[]`
offset - Offset at which to start storing characters - `int`
length - Maximum number of characters to read - `int`

returns: The number of characters read, or -1 if the end of the
             stream has been reached - `int`

throws: java.io.IOException - If an I/O error occurs
raw docstring

readyclj

(ready this)

Tells whether this stream is ready to be read. An InputStreamReader is ready if its input buffer is not empty, or if bytes are available to be read from the underlying byte stream.

returns: 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. - boolean

throws: java.io.IOException - If an I/O error occurs

Tells whether this stream is ready to be read.  An InputStreamReader is
 ready if its input buffer is not empty, or if bytes are available to be
 read from the underlying byte stream.

returns: 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. - `boolean`

throws: java.io.IOException - If an I/O error occurs
raw docstring

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