Readable (Java SE 12 & JDK 12 )

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

- Method Summary
  
  Modifier and Type Method Description
  
  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:
    
    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