# Class FileChooser.ExtensionFilter

java.lang.Object
javafx.stage.FileChooser.ExtensionFilter

Enclosing class:
  `FileChooser`

public static final class FileChooser.ExtensionFilter extends Object
Defines an extension filter, used for filtering which files can be chosen in a FileDialog based on the file name extensions.

Since:
  JavaFX 2.0

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `ExtensionFilter(String description, String... extensions)`
  Creates an `ExtensionFilter` with the specified description and the file name extensions.
  `ExtensionFilter(String description, List<String> extensions)`
  Creates an `ExtensionFilter` with the specified description and the file name extensions.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `String`
  `getDescription()`
  Gets the description for this `ExtensionFilter`.
  `List<String>`
  `getExtensions()`
  Gets the file name extensions for this `ExtensionFilter`.

  ### Methods declared in class Object

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

- ## Constructor Details

  - ### ExtensionFilter

    public ExtensionFilter(String description, String... extensions)
    Creates an `ExtensionFilter` with the specified description and the file name extensions.

    File name extension should be specified in the `*.<extension>` format.

    Parameters:
      `description` - the textual description for the filter
      `extensions` - the accepted file name extensions
    Throws:
      `NullPointerException` - if the description or the extensions are `null`
      `IllegalArgumentException` - if the description or the extensions are empty

  - ### ExtensionFilter

    public ExtensionFilter(String description, List<String> extensions)
    Creates an `ExtensionFilter` with the specified description and the file name extensions.

    File name extension should be specified in the `*.<extension>` format.

    Parameters:
      `description` - the textual description for the filter
      `extensions` - the accepted file name extensions
    Throws:
      `NullPointerException` - if the description or the extensions are `null`
      `IllegalArgumentException` - if the description or the extensions are empty

- ## Method Details

  - ### getDescription

    public String getDescription()
    Gets the description for this `ExtensionFilter`.
    Returns:
      the description

  - ### getExtensions

    public List<String> getExtensions()
    Gets the file name extensions for this `ExtensionFilter`.

    The returned list is unmodifiable and will throw `UnsupportedOperationException` on each modification attempt.

    Returns:
      the file name extensions