Flushable (Java SE 26 & JDK 26)
Description: declaration: module: java.base, package: java.io, interface: Flushable
Keywords: java.io.Flushable interface

# 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, 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

  Modifier and Type
  Method
  Description
  `void`
  `flush()`
  Flushes this stream by writing any buffered output to the underlying stream.

- ## Method Details

  - ### 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