Interface Readable
- All Known Implementing Classes:
-
BufferedReader,CharArrayReader,CharBuffer,FileReader,FilterReader,InputStreamReader,LineNumberReader,PipedReader,PushbackReader,Reader,StringReader,URLReader
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
Methods
| Modifier and Type | Method | Description |
|---|---|---|
int | read(CharBuffer cb) | Attempts to read characters into the specified character buffer. |
Methods
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:
- The number of
charvalues 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
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https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Readable.html