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## org.opencyc.util
Class SwingWorker

    java.lang.Object
      |
      +--org.opencyc.util.SwingWorker

Direct Known Subclasses:
  CycWorker

public abstract class SwingWorker
extends java.lang.Object

This is the 3rd version of SwingWorker (also known as SwingWorker 3), an abstract class that you subclass to perform GUI-related work in a dedicated thread. For instructions on using this class, see: http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html Note that the API changed slightly in the 3rd version: You must now invoke start() on the SwingWorker after creating it. Note: tbrussea added an event callback wrapper class based on this one, called CycWorker that should be easier to use.

THIS SOFTWARE AND KNOWLEDGE BASE CONTENT ARE PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENCYC ORGANIZATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE AND KNOWLEDGE BASE CONTENT, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Inner Class Summary
`static class` | `SwingWorker.ThreadVar` Class to maintain reference to current worker thread under separate synchronization control.

Field Summary
`protected SwingWorker.ThreadVar` | `threadVar`

Constructor Summary
`SwingWorker()` Start a thread that will call the `construct` method and then exit.

Method Summary
`abstract java.lang.Object` | `construct()` Compute the value to be returned by the `get` method.
`void` | `finished()` Called on the event dispatching thread (not on the worker thread) after the `construct` method has returned.
`java.lang.Object` | `get()` Return the value created by the `construct` method.
`protected java.lang.Object` | `getValue()` Get the value produced by the worker thread, or null if it hasn't been constructed yet.
`void` | `interrupt()` A new method that interrupts the worker thread.
`void` | `start()` Start the worker thread.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### threadVar

    protected SwingWorker.ThreadVar threadVar

Constructor Detail

### SwingWorker

    public SwingWorker()

  Start a thread that will call the `construct` method and then exit.

Method Detail

### getValue

    protected java.lang.Object getValue()

  Get the value produced by the worker thread, or null if it hasn't been constructed yet.

### construct

    public abstract java.lang.Object construct()

  Compute the value to be returned by the `get` method.

### finished

    public void finished()

  Called on the event dispatching thread (not on the worker thread) after the `construct` method has returned.

### interrupt

    public void interrupt()

  A new method that interrupts the worker thread. Call this method to force the worker to stop what it's doing.

### get

    public java.lang.Object get()

  Return the value created by the `construct` method. Returns null if either the constructing thread or the current thread was interrupted before a value was produced.
  Returns:
    the value created by the `construct` method

### start

    public void start()

  Start the worker thread.

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