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Class test.jcsp.ChoiceTest

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----java.applet.Applet
                                   |
                                   +----jcsp.awt.ActiveApplet
                                           |
                                           +----test.jcsp.ChoiceTest

public class ChoiceTest

extends ActiveApplet

implements ItemListener

Applet

Process Diagram

External View

  ____________
 |            |
 | ChoiceTest |
 |____________|
 

Internal View

  ___________________________________
 |  ___________________              |
 | |                   |             |
 | | Java Event Thread |             |
 | |___________________|             |
 |         |                         |
 |         v configure               |
 |  _______|______         ________  |
 | |              | event |        | |
 | | ActiveChoice |--->---|        | |
 | |______________|       |________| |
 |                                   |
 |                        ChoiceTest |
 |___________________________________|
 

Description

The anonymous process has an infinite loop which reads one Boolean and one Object from the event Channel the value of the Boolean and the Object will be displayed on the Label.

NOTE: The Java Event thread is a process which is created by the Java runtime environment and calls the itemStateChanged method when one of the components the Applet is listening to generates an ItemEvent.

The purpose of this test is to check to see if the events are notified correctly and that the configuration functions correctly.

NOTE: The code for this Applet is not a good example of developing programs using the library, it has been designed to allow the component to be tested without depending on more classes from the library than is necessary.

Author:

P.D.Austin

ChoiceTest()

getAppletInfo()

returns the name and author of the Applet.

init()

Initialise the applet.

itemStateChanged(ItemEvent)

Handles ItemEvents generated by components this class is listening to.

 public ChoiceTest()

 public void init()

Initialise the applet.

Overrides:

init in class Applet

 public void itemStateChanged(ItemEvent e)

Handles ItemEvents generated by components this class is listening to.

Parameters:

e - The ItemEvent to be processed

 public String getAppletInfo()

returns the name and author of the Applet.

Overrides:

getAppletInfo in class Applet

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