public class TrayIcon extends Object
TrayIcon object represents a tray icon that can be added to the system tray. A TrayIcon can have a tooltip (text), an image, a popup menu, and a set of listeners associated with it. A TrayIcon can generate various MouseEvents and supports adding corresponding listeners to receive notification of these events. TrayIcon processes some of the events by itself. For example, by default, when the right-mouse click is performed on the TrayIcon it displays the specified popup menu. When the mouse hovers over the TrayIcon the tooltip is displayed (this behaviour is platform dependent). 
Note: When the MouseEvent is dispatched to its registered listeners its component property will be set to null. (See ComponentEvent.getComponent()) The source property will be set to this TrayIcon. (See EventObject.getSource()) 
Note: A well-behaved TrayIcon implementation will assign different gestures to showing a popup menu and selecting a tray icon. 
A TrayIcon can generate an ActionEvent. On some platforms, this occurs when the user selects the tray icon using either the mouse or keyboard. 
If a SecurityManager is installed, the AWTPermission accessSystemTray must be granted in order to create a TrayIcon. Otherwise the constructor will throw a SecurityException. 
 See the SystemTray class overview for an example on how to use the TrayIcon API.
apple.awt.enableTemplateImages property is set, all images associated with instances of this class are treated as template images by the native desktop system. This means all color information is discarded, and the image is adapted automatically to be visible when desktop theme and/or colors change. This property only affects MacOSX.| Modifier and Type | Class | Description | 
|---|---|---|
| static enum  | TrayIcon.MessageType | The message type determines which icon will be displayed in the caption of the message, and a possible system sound a message may generate upon showing. | 
| Constructor | Description | 
|---|---|
| TrayIcon | Creates a  TrayIconwith the specified image. | 
| TrayIcon | Creates a  TrayIconwith the specified image and tooltip text. | 
| TrayIcon | Creates a  TrayIconwith the specified image, tooltip and popup menu. | 
| Modifier and Type | Method | Description | 
|---|---|---|
| void | addActionListener | Adds the specified action listener to receive  ActionEvents from thisTrayIcon. | 
| void | addMouseListener | Adds the specified mouse listener to receive mouse events from this  TrayIcon. | 
| void | addMouseMotionListener | Adds the specified mouse listener to receive mouse-motion events from this  TrayIcon. | 
| void | displayMessage | Displays a popup message near the tray icon. | 
| String | getActionCommand() | Returns the command name of the action event fired by this tray icon. | 
| ActionListener[] | getActionListeners() | Returns an array of all the action listeners registered on this  TrayIcon. | 
| Image | getImage() | Returns the current image used for this  TrayIcon. | 
| MouseListener[] | getMouseListeners() | Returns an array of all the mouse listeners registered on this  TrayIcon. | 
| MouseMotionListener[] | getMouseMotionListeners() | Returns an array of all the mouse-motion listeners registered on this  TrayIcon. | 
| PopupMenu | getPopupMenu() | Returns the popup menu associated with this  TrayIcon. | 
| Dimension | getSize() | Returns the size, in pixels, of the space that the tray icon occupies in the system tray. | 
| String | getToolTip() | Returns the tooltip string associated with this  TrayIcon. | 
| boolean | isImageAutoSize() | Returns the value of the auto-size property. | 
| void | removeActionListener | Removes the specified action listener. | 
| void | removeMouseListener | Removes the specified mouse listener. | 
| void | removeMouseMotionListener | Removes the specified mouse-motion listener. | 
| void | setActionCommand | Sets the command name for the action event fired by this tray icon. | 
| void | setImage | Sets the image for this  TrayIcon. | 
| void | setImageAutoSize | Sets the auto-size property. | 
| void | setPopupMenu | Sets the popup menu for this  TrayIcon. | 
| void | setToolTip | Sets the tooltip string for this  TrayIcon. | 
public TrayIcon(Image image)
TrayIcon with the specified image.image - the Image to be usedIllegalArgumentException - if image is null
UnsupportedOperationException - if the system tray isn't supported by the current platformHeadlessException - if GraphicsEnvironment.isHeadless() returns true
SecurityException - if accessSystemTray permission is not grantedpublic TrayIcon(Image image, String tooltip)
TrayIcon with the specified image and tooltip text. Tooltip may be not visible on some platforms.image - the Image to be usedtooltip - the string to be used as tooltip text; if the value is null no tooltip is shownIllegalArgumentException - if image is null
UnsupportedOperationException - if the system tray isn't supported by the current platformHeadlessException - if GraphicsEnvironment.isHeadless() returns true
SecurityException - if accessSystemTray permission is not grantedpublic TrayIcon(Image image, String tooltip, PopupMenu popup)
TrayIcon with the specified image, tooltip and popup menu. Tooltip may be not visible on some platforms.image - the Image to be usedtooltip - the string to be used as tooltip text; if the value is null no tooltip is shownpopup - the menu to be used for the tray icon's popup menu; if the value is null no popup menu is shownIllegalArgumentException - if image is null
UnsupportedOperationException - if the system tray isn't supported by the current platformHeadlessException - if GraphicsEnvironment.isHeadless() returns true
SecurityException - if accessSystemTray permission is not grantedpublic void setImage(Image image)
TrayIcon. The previous tray icon image is discarded without calling the Image.flush() method — you will need to call it manually. If the image represents an animated image, it will be animated automatically.
 See the setImageAutoSize(boolean) property for details on the size of the displayed image. 
Calling this method with the same image that is currently being used has no effect.
image - the non-null Image to be usedNullPointerException - if image is null
public Image getImage()
TrayIcon.public void setPopupMenu(PopupMenu popup)
TrayIcon. If popup is null, no popup menu will be associated with this TrayIcon. Note that this popup must not be added to any parent before or after it is set on the tray icon. If you add it to some parent, the popup may be removed from that parent. 
The popup can be set on one TrayIcon only. Setting the same popup on multiple TrayIcons will cause an IllegalArgumentException. 
Note: Some platforms may not support showing the user-specified popup menu component when the user right-clicks the tray icon. In this situation, either no menu will be displayed or, on some systems, a native version of the menu may be displayed.
popup - a PopupMenu or null to remove any popup menuIllegalArgumentException - if the popup is already set for another TrayIcon
public PopupMenu getPopupMenu()
TrayIcon.null if none existspublic void setToolTip(String tooltip)
TrayIcon. The tooltip is displayed automatically when the mouse hovers over the icon. Tooltip may be not visible on some platforms. Setting the tooltip to null removes any tooltip text. When displayed, the tooltip string may be truncated on some platforms; the number of characters that may be displayed is platform-dependent.tooltip - the string for the tooltip; if the value is null no tooltip is shownpublic String getToolTip()
TrayIcon.null if none existspublic void setImageAutoSize(boolean autosize)
false.  If auto-size is false, and the image size doesn't match the tray icon space, the image is painted as-is inside that space — if larger than the allocated space, it will be cropped. 
 If auto-size is true, the image is stretched or shrunk to fit the tray icon space.
autosize - true to auto-size the image, false otherwisepublic boolean isImageAutoSize()
true if the image will be auto-sized, false otherwisepublic void addMouseListener(MouseListener listener)
TrayIcon. Calling this method with a null value has no effect. Note: The MouseEvent's coordinates (received from the TrayIcon) are relative to the screen, not the TrayIcon. 
 Note: The MOUSE_ENTERED and MOUSE_EXITED mouse events are not supported. 
Refer to AWT Threading Issues for details on AWT's threading model.
listener - the mouse listenerpublic void removeMouseListener(MouseListener listener)
null or an invalid value has no effect. Refer to AWT Threading Issues for details on AWT's threading model.
listener - the mouse listenerpublic MouseListener[] getMouseListeners()
TrayIcon.MouseListeners registered on this TrayIcon or an empty array if no mouse listeners are currently registeredpublic void addMouseMotionListener(MouseMotionListener listener)
TrayIcon. Calling this method with a null value has no effect. Note: The MouseEvent's coordinates (received from the TrayIcon) are relative to the screen, not the TrayIcon. 
 Note: The MOUSE_DRAGGED mouse event is not supported. 
Refer to AWT Threading Issues for details on AWT's threading model.
listener - the mouse listenerpublic void removeMouseMotionListener(MouseMotionListener listener)
null or an invalid value has no effect. Refer to AWT Threading Issues for details on AWT's threading model.
listener - the mouse listenerpublic MouseMotionListener[] getMouseMotionListeners()
TrayIcon.MouseInputListeners registered on this TrayIcon or an empty array if no mouse listeners are currently registeredpublic String getActionCommand()
null if none existspublic void setActionCommand(String command)
null.command - a string used to set the tray icon's action command.public void addActionListener(ActionListener listener)
ActionEvents from this TrayIcon. Action events usually occur when a user selects the tray icon, using either the mouse or keyboard. The conditions in which action events are generated are platform-dependent. Calling this method with a null value has no effect. 
Refer to AWT Threading Issues for details on AWT's threading model.
listener - the action listenerpublic void removeActionListener(ActionListener listener)
null or an invalid value has no effect. Refer to AWT Threading Issues for details on AWT's threading model.
listener - the action listenerpublic ActionListener[] getActionListeners()
TrayIcon.ActionListeners registered on this TrayIcon or an empty array if no action listeners are currently registeredpublic void displayMessage(String caption, String text, TrayIcon.MessageType messageType)
ActionEvent. Either the caption or the text may be null, but an NullPointerException is thrown if both are null. When displayed, the caption or text strings may be truncated on some platforms; the number of characters that may be displayed is platform-dependent. 
Note: Some platforms may not support showing a message.
caption - the caption displayed above the text, usually in bold; may be null
text - the text displayed for the particular message; may be null
messageType - an enum indicating the message typeNullPointerException - if both caption and text are null
public Dimension getSize()
SystemTray.getTrayIconSize().
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