question: public void updateUI ( ) { if ( isAcceptAllFileFilterUsed ( ) ) { removeChoosableFileFilter ( getAcceptAllFileFilter ( ) ) ; } FileChooserUI ui = ( ( FileChooserUI ) UIManager . getUI ( this ) ) ; if ( fileSystemView == null ) { setFileSystemView ( FileSystemView . getFileSystemView ( ) ) ; } setUI ( ui ) ; if ( isAcceptAllFileFilterUsed ( ) ) { addChoosableFileFilter ( getAcceptAllFileFilter ( ) ) ; } }
target:  Resets the UI property to a value from the current look and feel.