程序包 java.lang

接口 Readable

所有已知实现类:

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

public interface Readable

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

从以下版本开始:

1.5

方法概要

限定符和类型	方法	说明
int	read(CharBuffer cb)	Attempts to read characters into the specified character buffer.

方法详细资料

read

int read(CharBuffer cb)
  throws IOException

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.

参数:

cb - the buffer to read characters into

返回:

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

抛出:

IOException - if an I/O error occurs

NullPointerException - if cb is null

ReadOnlyBufferException - if cb is a read only buffer