Readable

public interface Readable

java.lang.Readable

Known indirect subclasses

BufferedReader, CharArrayReader, CharBuffer, FileReader, FilterReader, InputStreamReader, LineNumberReader, PipedReader, PushbackReader, Reader, StringReader

BufferedReader	Reads text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines.
CharArrayReader	This class implements a character buffer that can be used as a character-input stream.
CharBuffer	A char buffer.
FileReader	Reads text from character files using a default buffer size.
FilterReader	Abstract class for reading filtered character streams.
InputStreamReader	An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified `charset`.
LineNumberReader	A buffered character-input stream that keeps track of line numbers.
PipedReader	Piped character-input streams.
PushbackReader	A character-stream reader that allows characters to be pushed back into the stream.
Reader	Abstract class for reading character streams.
StringReader	A character stream whose source is a string.

A Readable is a source of characters. Characters from a Readable are made available to callers of the read method via a CharBuffer.

Summary

Public methods
`abstract int`	`read(CharBuffer cb)` Attempts to read characters into the specified character buffer.

Public methods

read

Added in API level 1

public abstract int read (CharBuffer cb)

Attempts to read characters into the specified character buffer. The buffer is used as a repository of characters as-is: the only changes made are the results of a put operation. No flipping or rewinding of the buffer is performed.

Parameters
`cb`	`CharBuffer`: the buffer to read characters into

Returns
`int`	The number of `char` values added to the buffer, or -1 if this source of characters is at its end

Throws
`IOException`	if an I/O error occurs
`NullPointerException`	if cb is null
`ReadOnlyBufferException`	if cb is a read only buffer

Nov	DEC	Jan
	08
2022	2023	2024