AWT(Optional) AWTEvent Container Panel Applet Font Butto on window Kh Fr rame Fontmetrics Dialog KH FileDialog Text Field Obje Color c下 Textcomponer TextAre Graphics List Co Choice CheckBox Check BoxGroup Canvas Menu component Menuitem Menu Menu Bar ScrollbarAWT (Optional) AWTEvent Font FontMetrics Component Graphics Object Color Canvas Button TextComponent Label List CheckBoxGroup CheckBox Choice Container Panel Applet Frame Dialog FileDialog Window TextField TextArea MenuComponent MenuItem MenuBar Menu Scrollbar LayoutManager