Module java.base
Package java.lang

Interface Readable

All Known Implementing Classes:
BufferedReader,CharArrayReader,CharBuffer,FileReader,FilterReader,InputStreamReader,LineNumberReader,PipedReader,PushbackReader,Reader,StringReader
public interfaceReadable
AReadable is a source of characters. Characters from aReadable are made available to callers of the read method via aCharBuffer.
Since:
1.5

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    Attempts to read characters into the specified character buffer.

  • Method Details

    • read

      int read(CharBuffer cb) throwsIOException
      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 ofchar 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