All Packages  Class Hierarchy  This Package  Previous  Next  Index

Class java.io.InputStreamReader

java.lang.Object
   |
   +----java.io.Reader
           |
           +----java.io.InputStreamReader

public class InputStreamReader

extends Reader

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

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

See Also:

BufferedReader, InputStream

InputStreamReader(InputStream)

Create an InputStreamReader that uses the default character encoding.

InputStreamReader(InputStream, String)

Create an InputStreamReader that uses the named character encoding.

close()

Close the stream.

getEncoding()

Return the name of the encoding being used by this stream.

read()

Read a single character.

read(char[], int, int)

Read characters into a portion of an array.

ready()

Tell whether this stream is ready to be read.

 public InputStreamReader(InputStream in)

Create an InputStreamReader that uses the default character encoding.

Parameters:

in - An InputStream

 public InputStreamReader(InputStream in,
                          String enc) throws UnsupportedEncodingException

Create an InputStreamReader that uses the named character encoding.

Parameters:

in - An InputStream

enc - Name of encoding to be used

Throws: UnsupportedEncodingException

If the named encoding is not supported

 public String getEncoding()

Return the name of the encoding being used by this stream. May return null if the stream has been closed.

 public int read() throws IOException

Read a single character.

Returns:

The character read, or -1 if the end of the stream has been reached

Throws: IOException

If an I/O error occurs

Overrides:

read in class Reader

 public int read(char cbuf[],
                 int off,
                 int len) throws IOException

Read characters into a portion of an array.

Parameters:

cbuf - Destination buffer

off - Offset at which to start storing characters

len - Maximum number of characters to read

Returns:

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

Throws: IOException

If an I/O error occurs

Overrides:

read in class Reader

 public boolean ready() throws IOException

Tell 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.

Throws: IOException

If an I/O error occurs

Overrides:

ready in class Reader

 public void close() throws IOException

Close the stream.

Throws: IOException

If an I/O error occurs

Overrides:

close in class Reader

All Packages  Class Hierarchy  This Package  Previous  Next  Index