Module java.desktop
Package javax.swing.filechooser

Class FileNameExtensionFilter

java.lang.Object
javax.swing.filechooser.FileFilter
javax.swing.filechooser.FileNameExtensionFilter
public final class FileNameExtensionFilter extends FileFilter
An implementation of FileFilter that filters using a specified set of extensions. The extension for a file is the portion of the file name after the last ".". Files whose name does not contain a "." have no file name extension. File name extension comparisons are case insensitive.

The following example creates a FileNameExtensionFilter that will show jpg files: 

 FileFilter filter = new FileNameExtensionFilter("JPEG file", "jpg", "jpeg");
 JFileChooser fileChooser = ...;
 fileChooser.addChoosableFileFilter(filter);
Since:
1.6
See Also:
FileFilter, JFileChooser.setFileFilter(javax.swing.filechooser.FileFilter), JFileChooser.addChoosableFileFilter(javax.swing.filechooser.FileFilter), JFileChooser.getFileFilter()

  • Constructor Details

    • FileNameExtensionFilter

      public FileNameExtensionFilter​(String description, String... extensions)
      Creates a FileNameExtensionFilter with the specified description and file name extensions. The returned FileNameExtensionFilter will accept all directories and any file with a file name extension contained in extensions.
      Parameters:
      description - textual description for the filter, may be null
      extensions - the accepted file name extensions
      Throws:
      IllegalArgumentException - if extensions is null, empty, contains null, or contains an empty string
      See Also:
      accept(java.io.File)

  • Method Details

    • accept

      public boolean accept​(File f)
      Tests the specified file, returning true if the file is accepted, false otherwise. True is returned if the extension matches one of the file name extensions of this FileFilter, or the file is a directory.
      Specified by:
      accept in class FileFilter
      Parameters:
      f - the File to test
      Returns:
      true if the file is to be accepted, false otherwise

    • getDescription

      public String getDescription()
      The description of this filter. For example: "JPG and GIF Images."
      Specified by:
      getDescription in class FileFilter
      Returns:
      the description of this filter
      See Also:
      FileView.getName(java.io.File)

    • getExtensions

      public String[] getExtensions()
      Returns the set of file name extensions files are tested against.
      Returns:
      the set of file name extensions files are tested against

    • toString

      public String toString()
      Returns a string representation of the FileNameExtensionFilter. This method is intended to be used for debugging purposes, and the content and format of the returned string may vary between implementations.
      Overrides:
      toString in class Object
      Returns:
      a string representation of this FileNameExtensionFilter