Flushable (Java Platform SE 8 )
Keywords: java.io.Flushable interface
Date: 2026-04-17

compact1, compact2, compact3
java.io

## Interface Flushable

- All Known Subinterfaces:
    JavaFileManager, StandardJavaFileManager
  All Known Implementing Classes:
    BufferedOutputStream, BufferedWriter, ByteArrayOutputStream, CharArrayWriter, CheckedOutputStream, CipherOutputStream, Console, DataOutputStream, DeflaterOutputStream, DigestOutputStream, FileOutputStream, FileWriter, FilterOutputStream, FilterWriter, Formatter, ForwardingJavaFileManager, GZIPOutputStream, InflaterOutputStream, JarOutputStream, LogStream, ObjectOutputStream, OutputStream, OutputStream, OutputStream, OutputStreamWriter, PipedOutputStream, PipedWriter, PrintStream, PrintWriter, StringWriter, Writer, ZipOutputStream

      public interface Flushable

  A `Flushable` is a destination of data that can be flushed. The flush method is invoked to write any buffered output to the underlying stream.
  Since:
    1.5

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `flush()` Flushes this stream by writing any buffered output to the underlying stream.

- - ### Method Detail

    - #### flush

          void flush()
              throws IOException

      Flushes this stream by writing any buffered output to the underlying stream.
      Throws:
        `IOException` - If an I/O error occurs

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