What happens when SwingWorker task is not finished?

If the SwingWorker object has not finished executing the doInBackground() method, the call to this method blocks until the result is ready. It is not suggested to call this method on the event dispatch thread, as it will block all events until it returns. cancels the task if it is still running.

How does SwingWorker work?

SwingWorker class is a task worker, which performs time-consuming tasks in the background. A SwingWorker instance interacts with 3 threads, Current thread, the Worker thread, and the Event Dispatch thread(EDT). The Current thread calls the execute() method to kick off the task to the background and returns immediately.

Is SwingWorker thread safe?

Since Swing is not thread-safe by design, it’s designer did provide couple of utility methods in SwingUtilities class to update any Swing component from a thread other thread Event Dispatcher Thread.

What is SwingUtilities invokeLater?

An invokeLater() method is a static method of the SwingUtilities class and it can be used to perform a task asynchronously in the AWT Event dispatcher thread. The SwingUtilities. invokeLater() method works like SwingUtilities. invokeAndWait() except that it puts the request on the event queue and returns immediately.

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.

How do you use thread pool in Java?

To use thread pools, we first create a object of ExecutorService and pass a set of tasks to it. ThreadPoolExecutor class allows to set the core and maximum pool size. The runnables that are run by a particular thread are executed sequentially. Method Description newFixedThreadPool(int) Creates a fixed size thread pool.

Is JavaFX thread-safe?

The JavaFX scene graph, which represents the graphical user interface of a JavaFX application, is not thread-safe and can only be accessed and modified from the UI thread also known as the JavaFX Application thread.

What is Java Util Concurrent?

concurrent Package. Java Concurrency package covers concurrency, multithreading, and parallelism on the Java platform. Concurrency is the ability to run several or multi programs or applications in parallel.

What is the difference between InvokeAndWait and invokeLater?

Difference on InvokeLater vs InvokeAndWait in Swing 1) InvokeLater is used to perform a task asynchronously in AWT Event dispatcher thread while InvokeAndWait is used to perform task synchronously. 2) InvokeLater is a non-blocking call while InvokeAndWait will block until the task is completed.

What is EventQueue invokeLater?

invokeLater. public static void invokeLater(Runnable runnable) Causes runnable to have its run method called in the dispatch thread of the system EventQueue . This will happen after all pending events are processed.

What is the most recent version of SwingWorker?

The most recent of these versions dates from 2003 and is often referred to as SwingWorker version 3. Unfortunately, the JDK 6.0 SwingWorker and the Version 3 SwingWorker use different method names and are not compatible. The backport version (see below) is now recommended for pre-Java 6 usage.

What is the use of SwingWorker?

SwingWorker is useful when a time-consuming task has to be performed following a user-interaction event (for example, parsing a huge XML File, on pressing a JButton). The most straightforward way to do it is :

What is the use of doinbackground in SwingWorker?

SwingWorker is designed for such tricky situations which provides communication on event dispatch thread. doInBackground (): This function contains our logic of the background task i.e. what we want our thread to do. This function runs on worker thread and is necessary to implement.

What is SwingWorker in Java 6?

SwingWorker enables proper use of the event dispatching thread. As of Java 6, SwingWorker is included in the JRE. Several incompatible, unofficial, versions of SwingWorker were produced from 1998 to 2006, and care must be taken to avoid the abundant documentation on these versions predating Java 6.