Class java.awt.PopupMenu - JDK 5 Documentation v1.1.8, Java 2 SDK 英文文档

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Class java.awt.PopupMenu

java.lang.Object
   |
   +----java.awt.MenuComponent
           |
           +----java.awt.MenuItem
                   |
                   +----java.awt.Menu
                           |
                           +----java.awt.PopupMenu

public class PopupMenu
extends Menu

A class that implements a menu which can be dynamically popped up at a specified position within a component.

PopupMenu(): Creates a new popup menu.
PopupMenu(String): Creates a new popup menu with the specified name.

addNotify(): Creates the popup menu's peer.
show(Component, int, int): Shows the popup menu at the x, y position relative to an origin component.

PopupMenu

 public PopupMenu()

Creates a new popup menu.

PopupMenu

 public PopupMenu(String label)

Creates a new popup menu with the specified name.

Parameters:: label - the title string for the popup menu

addNotify

 public void addNotify()

Creates the popup menu's peer. The peer allows us to change the appearance of the popup menu without changing any of the popup menu's functionality.

Overrides:: addNotify in class Menu

show

 public void show(Component origin,
                  int x,
                  int y)

Shows the popup menu at the x, y position relative to an origin component. The origin component must be contained within the component hierarchy of the popup menu's parent. Both the origin and the parent must be showing on the screen for this method to be valid.

Parameters:: origin - the component which defines the coordinate space; x - the x coordinate position to popup the menu; y - the y coordinate position to popup the menu

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