Manage and support computers, servers, storage systems, operating systems, networking, and more Custom classes extending Component (Swing) or Control (SWT) can be added to the GUI. SWT_AWT methods supported, so that SWT controls can be inserted into Swing components, Swing components can be inserted into SWT controls. Non-visual classes can also be added to the GUI, and their properties edited with the property editor Grid - A Component for grid based games like sudoku or chess. Ikonli - Ikonli provides icon packs that can be used in Java applications. Currently Swing and JavaFX UI toolkits are supported. JavaFX DataViewer - JavaFX Charts library. Create Charts in JavaFX using the blogger.com library
Java Swing | JDialog with examples - GeeksforGeeks
The Java Tutorials have been written for JDK 8. Examples and practices described in this page don't take write a custom swing component of improvements introduced in later releases and might use technology no longer available. See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases. See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.
Mouse events notify when the user uses the mouse or similar input device to interact with a component. Mouse events occur when the cursor enters or exits a component's onscreen area and when the user presses or releases one of the mouse buttons. Tracking the cursor's motion involves significantly more system overhead than tracking other mouse events.
That is why mouse-motion events are separated into Mouse Motion listener type see How to Write a Mouse Motion Listener. To track mouse wheel events, you can register a mouse-wheel listener.
See How to Write a Mouse Wheel Listener for more information. If an application requires the detection of both mouse events and mouse-motion events, use the MouseInputAdapter class, write a custom swing component.
This class implements the MouseInputListenera convenient interface that implements the MouseListener and MouseMotionListener interfaces, write a custom swing component. However, the MouseInputListener interface does not implement the MouseWheelListener interface. Alternatively, use the corresponding AWT MouseAdapter class, which implements the MouseListenerMouseMotionListenerand MouseWheelListener interfaces.
The following example shows a mouse listener. At the top of the window is a blank area implemented by a class named BlankArea. The mouse listener listens for events both on the BlankArea and on its container, an instance of MouseEventDemo. Each time a mouse event occurs, a descriptive message is displayed under the blank area.
By moving the cursor on top of the blank area and occasionally pressing mouse buttons, you can fire mouse events. You can find the demo's code in MouseEventDemo. java and BlankArea. Here is the demo's mouse event handling code:. The MouseListener Interface. The MouseAdapter class the AWT adapter class is abstract.
All its methods have an empty body. So a developer can define methods for events specific to the application. You can also use the MouseInputAdapter class, which has all the methods available from MouseListener and MouseMotionListener.
The MouseEvent class inherits many useful methods from InputEvent and a couple handy methods from the ComponentEvent and AWTEvent classes. The MouseInfo class provides methods to obtain information about the mouse pointer location at any time while an application runs. About Oracle Contact Us Legal Notices Terms of Use Your Privacy Rights.
All rights reserved. Hide TOC. Writing Event Listeners, write a custom swing component. General Information about Writing Write a custom swing component Listeners. Listeners Supported by Swing Components. Implementing Listeners for Commonly Handled Events. How to Write an Internal Frame Listener. How to Write a List Selection Listener.
How to Write a Property Change Listener. How to Write a Tree Expansion Listener. How to Write a Tree Selection Listener. How to Write a Tree-Will-Expand Listener.
How to Write an Undoable Edit Listener. Trail: Creating a GUI With Swing Lesson: Writing Event Listeners Section: Implementing Listeners for Commonly Handled Events. Alternatively, to compile and run the example yourself, consult the example index. Move the cursor into the yellow rectangle at the top of the window. You will see one or more mouse-entered events. Press and hold the left mouse button without moving the mouse, write a custom swing component.
You will see a mouse-pressed event. You might see some extra mouse events, such as mouse-exited and then mouse-entered.
Release the mouse button. You will see a mouse-released event. If you write a custom swing component not move the mouse, write a custom swing component, a mouse-clicked event will follow. Press and hold the mouse button again, and then drag the mouse so that the cursor ends up outside the window. You will see a mouse-pressed event, followed by a mouse-exited event, followed by a mouse-released event.
You are not notified of the cursor's motion. To get mouse-motion events, you need to implement a mouse-motion listener. public class MouseEventDemo addMouseListener this ; addMouseListener this ; if event. Previous page: How to Write a List Selection Listener Next page: How to Write a Mouse-Motion Listener. mouseClicked MouseEvent. mouseEntered MouseEvent. mouseExited MouseEvent. mousePressed MouseEvent. Called just after the user presses a mouse button while the cursor is over the listened-to component.
mouseReleased MouseEvent. Called just after the user releases a mouse write a custom swing component after a mouse press over the listened-to component.
int getClickCount. Returns the number of quick, consecutive clicks the user has made including this event. For example, returns 2 for a double click. int getX int getY Point getPoint, write a custom swing component. Return the x,y position at which the event occurred, relative to the component that fired the event. int getXOnScreen int getYOnScreen int getLocationOnScreen.
Return the absolute x,y position of the event. Write a custom swing component coordinates are relative to the virtual coordinate system for the multi-screen environment. Otherwise, these coordinates are relative to the coordinate system associated with the Component's Graphics Configuration. int getButton. Returns which mouse button, if any, has a changed state. One of the following constants is returned: NOBUTTONBUTTON1BUTTON2or BUTTON3. boolean isPopupTrigger.
Returns true if the mouse event should cause a popup menu to appear. Because popup triggers are platform dependent, if your program uses popup menus, you should call isPopupTrigger for all mouse-pressed and mouse-released events fired by components over which the popup can appear. See Bringing Up a Popup Menu for more information about popup menus. String getMouseModifiersText int.
These strings can be localized using the awt. properties file. int getID in java. Returns the event type, which defines the particular action. For example, the MouseEvent id reflects the state of the mouse buttons for every mouse event. The following states could be specified by the MouseEvent id: MouseEvent.
Component getComponent in ComponentEvent. Returns the component that fired the event. You can use this method instead of the getSource method. int getWhen. Returns the timestamp of when this event occurred. The higher the timestamp, the more recently the event occurred. boolean isAltDown boolean isControlDown boolean isMetaDown boolean isShiftDown. int getModifiers.
Java Swing - Updating a JComponent Drawing
, time: 28:20Event dispatching thread - Wikipedia
Commonly used methods in Component class: Figure Commonly used methods in Component class: Java Swing examples. There are two ways to create a frame: By creating the object of Frame class (Association) By extending Frame class (Inheritance) We can write the code of Swing inside the main(), constructor or any other method. JFrame object Manage and support computers, servers, storage systems, operating systems, networking, and more The following example demonstrates focus events. The window displays a variety of components. A focus listener, registered on each component, reports every focus-gained and focus-lost event. For each event, the other component involved in the focus change, the opposite component, is reported. For example, when the focus goes from a button to a
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