- 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
Modifier and Type Method Description int
read(CharBuffer cb)
Attempts to read characters into the specified character buffer.
-
Method Details
-
read
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:
- 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 occursNullPointerException
- if cb is nullReadOnlyBufferException
- if cb is a read only buffer
-