Readable (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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Java^TM 2 Platform
Standard Ed. 5.0

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java.lang
Interface Readable

All Known Implementing Classes:: 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.

Since:: 1.5

Method Summary

int read(CharBuffer cb)
Attempts to read characters into the specified character buffer.

Method Summary
`int`	`read(CharBuffer cb)` Attempts to read characters into the specified character buffer.

Method Detail

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.

Parameters:: cb - the buffer to read characters into
Returns:: @return 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