Module java.base
Package 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

    Modifier and Type Method Description
    int read​(CharBuffer cb)
    Attempts to read characters into the specified character buffer.
  • Method Details

    • 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