Creates a file dialog window with the specified title for loading or saving a file.

If the value of mode is LOAD, then the file dialog is finding a file to read, and the files shown are those in the current directory. If the value of mode is SAVE, the file dialog is finding a place to write a file.

Note: Some platforms may not support showing the user-specified title in a file dialog. In this situation, either no title will be displayed in the file dialog's title bar or, on some systems, the file dialog's title bar will not be displayed.

Parameters:

parent     the owner of the dialog

title     the title of the dialog; a null value will be accepted without causing a NullPointerException to be thrown

mode     the mode of the dialog; either FileDialog.LOAD or FileDialog.SAVE

Exceptions:

java.lang.IllegalArgumentException     if an illegal file dialog mode is supplied;

java.lang.IllegalArgumentException     if the parent's GraphicsConfiguration is not from a screen device;

java.lang.IllegalArgumentException     if parent is null; this exception is always thrown when GraphicsEnvironment.isHeadless returns true

Since: 1.5

`parent`		the owner of the dialog
`title`		the title of the dialog; a `null` value will be accepted without causing a `NullPointerException` to be thrown
`mode`		the mode of the dialog; either `FileDialog.LOAD` or `FileDialog.SAVE`

`java.lang.IllegalArgumentException`		if an illegal file dialog mode is supplied;
`java.lang.IllegalArgumentException`		if the `parent`'s `GraphicsConfiguration` is not from a screen device;
`java.lang.IllegalArgumentException`		if `parent` is `null`; this exception is always thrown when `GraphicsEnvironment.isHeadless` returns `true`