What is menu item in Java?

The object of MenuItem class adds a simple labeled menu item on menu. The items used in a menu must belong to the MenuItem or any of its subclass. The object of Menu class is a pull down menu component which is displayed on the menu bar. It inherits the MenuItem class.

What is a SwingWorker in Java?

SwingWorker is an abstract class developed for Swing library of the Java programming language. It is used to performed lengthy GUI interaction tasks in a background thread. Worker Threads: also known as background thread where all time consuming background tasks are executed.

What is a Java menu accelerator?

An accelerator is a key-press that selects an option within the menu without it ever being open.

What is dialog box in Java?

The Dialog control represents a top level window with a border and a title used to take some form of input from the user. It inherits the Window class. Unlike Frame, it doesn’t have maximize and minimize buttons.

What is the immediate superclass of menu?

What is the immediate superclass of Menu? What is the immediate superclass of Menu? package.

What is worker in Java?

A Worker is an object which performs some work in one or more background threads, and whose state is observable and available to JavaFX applications and is usable from the main JavaFX Application thread.

How do I stop being a SwingWorker?

To cancel a running background task, invoke SwingWorker. cancel The task must cooperate with its own cancellation. There are two ways it can do this: By terminating when it receives an interrupt.

What is setMnemonic?

setMnemonic(KeyEvent. VK_*);” statement is used to assign a specific mnemonic to a menu item. When the “b” key was typed, 3 menu key pressed events were fired from “Red”, “Green”, and “Bleu” menu items. 1 action event was fired from the “Blue” menu item, because “b” matches its mnemonic.

Is accelerator interact with menu?

Accelerators allows user to interact with menu items using keys on keyboard. Adding an action listener to each menu item. 3. When an accelerator, key combination, is pressed at any time, the menu item with the matching accelerator will fire an action event.

What is a JOptionPane in Java?

JOptionPane is a class library that makes it easy to pop up a simple dialog box that either provides an information message or asks for a simple input from the user. While the class has a lot of methods, most uses of this class are through a few static methods.

What is the SwingWorker class in Java used for?

SwingWorker is an abstract class developed for Swing library of the Java programming language. It is used to performed lengthy GUI interaction tasks in a background thread. While developing applications, sometimes the GUI hangs when it is trying to do some huge or lengthy task.

What is the javax.swing.event.menuevent class?

javax.swing.event.MenuEvent – A Swing class that represents an event occurred on a menu. The most important method in this class is: getSource () – Method returns the JMenu object where the event occurred. Here is an example program I wrote to test the MenuListener interface: /* MenuListenerTest.java * Copyright (c) HerongYang.com.

What can you do with a menu bar in Java?

The following figure shows many menu-related components: a menu bar, menus, menu items, radio button menu items, check box menu items, and separators. As you can see, a menu item can have either an image or text, or both. You can also specify other properties, such as font and color.

Where does data chunks go in Java SwingWorker?

Sends data chunks to the process (java.util.List ) method. This method is to be used from inside the doInBackground method to deliver intermediate results for processing on the Event Dispatch Thread inside the process method.

https://www.youtube.com/watch?v=X9jvo3gyAHM