Frames, Dialog You can create additional windows as in pop-up windows for your Java Applet or create Java applications with GUIs using the Java java.awt.Window class. Frame Is a platform-specific window with a title, menu bar, close boxes, resize handles and other window features.
Intented use is transient meaning they appear only for a warning, etc.
Usually don't have title bars, or menu bars, etc. It will cause a security exception. NOT Applets Platform independent but, will envoke the system's standard Open File or Save File dialog. As with Frame,Dialog and FileDialog you add components to dialog, and can choose layout manager. Menus Only for windows not for an Applet's panel.