MidiFileWriter (Java SE 25 & JDK 25)
Description: declaration: module: java.desktop, package: javax.sound.midi.spi, class: MidiFileWriter
Keywords: javax.sound.midi.spi.MidiFileWriter class

# Class MidiFileWriter

java.lang.Object
javax.sound.midi.spi.MidiFileWriter

public abstract class MidiFileWriter extends Object
A `MidiFileWriter` supplies MIDI file-writing services. Classes that implement this interface can write one or more types of MIDI file from a `Sequence` object.

Since:
  1.3

- ## Constructor Summary

  Constructors
  Modifier
  Constructor
  Description
  `protected`
  `MidiFileWriter()`
  Constructor for subclasses to call.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `abstract int[]`
  `getMidiFileTypes()`
  Obtains the set of MIDI file types for which file writing support is provided by this file writer.
  `abstract int[]`
  `getMidiFileTypes(Sequence sequence)`
  Obtains the file types that this file writer can write from the sequence specified.
  `boolean`
  `isFileTypeSupported(int fileType)`
  Indicates whether file writing support for the specified MIDI file type is provided by this file writer.
  `boolean`
  `isFileTypeSupported(int fileType, Sequence sequence)`
  Indicates whether a MIDI file of the file type specified can be written from the sequence indicated.
  `abstract int`
  `write(Sequence in, int fileType, File out)`
  Writes a stream of bytes representing a MIDI file of the file type indicated to the external file provided.
  `abstract int`
  `write(Sequence in, int fileType, OutputStream out)`
  Writes a stream of bytes representing a MIDI file of the file type indicated to the output stream provided.

  ### Methods declared in class Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Constructor Details

  - ### MidiFileWriter

    protected MidiFileWriter()
    Constructor for subclasses to call.

- ## Method Details

  - ### getMidiFileTypes

    public abstract int[] getMidiFileTypes()
    Obtains the set of MIDI file types for which file writing support is provided by this file writer.
    Returns:
      array of file types. If no file types are supported, an array of length 0 is returned.

  - ### getMidiFileTypes

    public abstract int[] getMidiFileTypes(Sequence sequence)
    Obtains the file types that this file writer can write from the sequence specified.
    Parameters:
      `sequence` - the sequence for which MIDI file type support is queried
    Returns:
      array of file types. If no file types are supported, returns an array of length 0.
    Throws:
      `NullPointerException` - if `sequence` is `null`

  - ### isFileTypeSupported

    public boolean isFileTypeSupported(int fileType)
    Indicates whether file writing support for the specified MIDI file type is provided by this file writer.
    Parameters:
      `fileType` - the file type for which write capabilities are queried
    Returns:
      `true` if the file type is supported, otherwise `false`

  - ### isFileTypeSupported

    public boolean isFileTypeSupported(int fileType, Sequence sequence)
    Indicates whether a MIDI file of the file type specified can be written from the sequence indicated.
    Parameters:
      `fileType` - the file type for which write capabilities are queried
      `sequence` - the sequence for which file writing support is queried
    Returns:
      `true` if the file type is supported for this sequence, otherwise `false`
    Throws:
      `NullPointerException` - if `sequence` is `null`

  - ### write

    public abstract int write(Sequence in, int fileType, OutputStream out) throws IOException
    Writes a stream of bytes representing a MIDI file of the file type indicated to the output stream provided.
    Parameters:
      `in` - sequence containing MIDI data to be written to the file
      `fileType` - type of the file to be written to the output stream
      `out` - stream to which the file data should be written
    Returns:
      the number of bytes written to the output stream
    Throws:
      `IOException` - if an I/O exception occurs
      `IllegalArgumentException` - if the file type is not supported by this file writer
      `NullPointerException` - if `in` or `out` are `null`
    See Also:
      - `isFileTypeSupported(int, Sequence)`
      - `getMidiFileTypes(Sequence)`

  - ### write

    public abstract int write(Sequence in, int fileType, File out) throws IOException
    Writes a stream of bytes representing a MIDI file of the file type indicated to the external file provided.
    Parameters:
      `in` - sequence containing MIDI data to be written to the external file
      `fileType` - type of the file to be written to the external file
      `out` - external file to which the file data should be written
    Returns:
      the number of bytes written to the file
    Throws:
      `IOException` - if an I/O exception occurs
      `IllegalArgumentException` - if the file type is not supported by this file writer
      `NullPointerException` - if `in` or `out` are `null`
    See Also:
      - `isFileTypeSupported(int, Sequence)`
      - `getMidiFileTypes(Sequence)`