java.lang.Object | +----java.awt.Component | +----java.awt.Container | +----java.awt.Window | +----java.awt.Dialog | +----java.awt.FileDialog
public class FileDialog
extends Dialog
The FileDialog class displays a dialog window from which the user can select a file.
Since it is a modal dialog, when the application calls its show method to display the dialog, it blocks the rest of the application until the user has chosen a file.