# Flushable Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) # Flushable ``` interface Flushable ``` |----------------------------------------------------------------------------------------| | [java.io.Flushable](https://developer.android.com/reference/kotlin/java/io/Flushable#) | 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| Known Direct Subclasses [Console](https://developer.android.com/reference/kotlin/java/io/Console),[Formatter](https://developer.android.com/reference/kotlin/java/util/Formatter.html#),[OutputStream](https://developer.android.com/reference/kotlin/java/io/OutputStream),[Writer](https://developer.android.com/reference/kotlin/java/io/Writer) |---------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------| | [Console](https://developer.android.com/reference/kotlin/java/io/Console) | Methods to access the character-based console device, if any, associated with the current Java virtual machine. | | [Formatter](https://developer.android.com/reference/kotlin/java/util/Formatter.html#) | An interpreter for printf-style format strings. | | [OutputStream](https://developer.android.com/reference/kotlin/java/io/OutputStream) | This abstract class is the superclass of all classes representing an output stream of bytes. | | [Writer](https://developer.android.com/reference/kotlin/java/io/Writer) | Abstract class for writing to character streams. | | 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| Known Indirect Subclasses [AssetFileDescriptor.AutoCloseOutputStream](https://developer.android.com/reference/kotlin/android/content/res/AssetFileDescriptor.AutoCloseOutputStream.html#),[Base64OutputStream](https://developer.android.com/reference/kotlin/android/util/Base64OutputStream.html#),[BufferedOutputStream](https://developer.android.com/reference/kotlin/java/io/BufferedOutputStream),[BufferedWriter](https://developer.android.com/reference/kotlin/java/io/BufferedWriter),[ByteArrayOutputStream](https://developer.android.com/reference/kotlin/java/io/ByteArrayOutputStream),[CharArrayWriter](https://developer.android.com/reference/kotlin/java/io/CharArrayWriter),[CheckedOutputStream](https://developer.android.com/reference/kotlin/java/util/zip/CheckedOutputStream.html#),[CipherOutputStream](https://developer.android.com/reference/kotlin/javax/crypto/CipherOutputStream.html#),[DataOutputStream](https://developer.android.com/reference/kotlin/java/io/DataOutputStream),[DeflaterOutputStream](https://developer.android.com/reference/kotlin/java/util/zip/DeflaterOutputStream.html#),[DigestOutputStream](https://developer.android.com/reference/kotlin/java/security/DigestOutputStream.html#),[FileOutputStream](https://developer.android.com/reference/kotlin/java/io/FileOutputStream), and 15 others. |-----------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [AssetFileDescriptor.AutoCloseOutputStream](https://developer.android.com/reference/kotlin/android/content/res/AssetFileDescriptor.AutoCloseOutputStream.html#) | An OutputStream you can create on a ParcelFileDescriptor, which will take care of calling android. | | [Base64OutputStream](https://developer.android.com/reference/kotlin/android/util/Base64OutputStream.html#) | An OutputStream that does Base64 encoding on the data written to it, writing the resulting data to another OutputStream. | | [BufferedOutputStream](https://developer.android.com/reference/kotlin/java/io/BufferedOutputStream) | The class implements a buffered output stream. | | [BufferedWriter](https://developer.android.com/reference/kotlin/java/io/BufferedWriter) | Writes text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays, and strings. | | [ByteArrayOutputStream](https://developer.android.com/reference/kotlin/java/io/ByteArrayOutputStream) | This class implements an output stream in which the data is written into a byte array. | | [CharArrayWriter](https://developer.android.com/reference/kotlin/java/io/CharArrayWriter) | This class implements a character buffer that can be used as an Writer. | | [CheckedOutputStream](https://developer.android.com/reference/kotlin/java/util/zip/CheckedOutputStream.html#) | An output stream that also maintains a checksum of the data being written. | | [CipherOutputStream](https://developer.android.com/reference/kotlin/javax/crypto/CipherOutputStream.html#) | A CipherOutputStream is composed of an OutputStream and a Cipher so that write() methods first process the data before writing them out to the underlying OutputStream. | | [DataOutputStream](https://developer.android.com/reference/kotlin/java/io/DataOutputStream) | A data output stream lets an application write primitive Java data types to an output stream in a portable way. | | [DeflaterOutputStream](https://developer.android.com/reference/kotlin/java/util/zip/DeflaterOutputStream.html#) | This class implements an output stream filter for compressing data in the "deflate" compression format. | | [DigestOutputStream](https://developer.android.com/reference/kotlin/java/security/DigestOutputStream.html#) | A transparent stream that updates the associated message digest using the bits going through the stream. | | [FileOutputStream](https://developer.android.com/reference/kotlin/java/io/FileOutputStream) | A file output stream is an output stream for writing data to a`File`or to a`FileDescriptor`. | | [FileWriter](https://developer.android.com/reference/kotlin/java/io/FileWriter) | Writes text to character files using a default buffer size. | | [FilterOutputStream](https://developer.android.com/reference/kotlin/java/io/FilterOutputStream) | This class is the superclass of all classes that filter output streams. | | [FilterWriter](https://developer.android.com/reference/kotlin/java/io/FilterWriter) | Abstract class for writing filtered character streams. | | [GZIPOutputStream](https://developer.android.com/reference/kotlin/java/util/zip/GZIPOutputStream.html#) | This class implements a stream filter for writing compressed data in the GZIP file format. | | [InflaterOutputStream](https://developer.android.com/reference/kotlin/java/util/zip/InflaterOutputStream.html#) | Implements an output stream filter for uncompressing data stored in the "deflate" compression format. | | [JarOutputStream](https://developer.android.com/reference/kotlin/java/util/jar/JarOutputStream.html#) | The`JarOutputStream`class is used to write the contents of a JAR file to any output stream. | | [ObjectOutputStream](https://developer.android.com/reference/kotlin/java/io/ObjectOutputStream) | An ObjectOutputStream writes primitive data types and graphs of Java objects to an OutputStream. | | [OutputStreamWriter](https://developer.android.com/reference/kotlin/java/io/OutputStreamWriter) | An OutputStreamWriter is a bridge from character streams to byte streams: Characters written to it are encoded into bytes using a specified . | | [ParcelFileDescriptor.AutoCloseOutputStream](https://developer.android.com/reference/kotlin/android/os/ParcelFileDescriptor.AutoCloseOutputStream.html#) | An OutputStream you can create on a ParcelFileDescriptor, which will take care of calling android. | | [PipedOutputStream](https://developer.android.com/reference/kotlin/java/io/PipedOutputStream) | A piped output stream can be connected to a piped input stream to create a communications pipe. | | [PipedWriter](https://developer.android.com/reference/kotlin/java/io/PipedWriter) | Piped character-output streams. | | [PrintStream](https://developer.android.com/reference/kotlin/java/io/PrintStream) | A`PrintStream`adds functionality to another output stream, namely the ability to print representations of various data values conveniently. | | [PrintWriter](https://developer.android.com/reference/kotlin/java/io/PrintWriter) | Prints formatted representations of objects to a text-output stream. | | [StringWriter](https://developer.android.com/reference/kotlin/java/io/StringWriter) | A character stream that collects its output in a string buffer, which can then be used to construct a string. | | [ZipOutputStream](https://developer.android.com/reference/kotlin/java/util/zip/ZipOutputStream.html#) | This class implements an output stream filter for writing files in the ZIP file format. | | 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. ## Summary | Public methods || |--------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------| | abstract[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [flush](https://developer.android.com/reference/kotlin/java/io/Flushable#flush())`()` Flushes this stream by writing any buffered output to the underlying stream. | ## Public methods ### flush Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` abstract fun flush(): Unit ``` Flushes this stream by writing any buffered output to the underlying stream. | Exceptions || |-----------------------|------------------------| | `java.io.IOException` | If an I/O error occurs |