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Java Source Code / Java Documentation » IDE Netbeans » mobility » example.stock

Source Cross Reference Class Diagram Java Document (Java Doc)

example.stock .StockMIDlet

StockMIDlet
public class StockMIDlet extends MIDlet (Code)
	The MIDlet application class that we'll run for the Stock Demo.

Field Summary
Display	display

Constructor Summary
public	StockMIDlet()

Method Summary
public void	destroyApp(boolean unconditional) When the application management software has determined that the `MIDlet` is no longer needed, or perhaps needs to make room for a higher priority application in memory, is signals the `MIDlet` that it is a candidate to be destroyed by invoking the `destroyApp(boolean)` method.
public void	pauseApp() This method is invoked by the application management software when the `MIDlet` no longer needs to be active.
public void	startApp() This method is invoked when the `MIDlet` is ready to run and starts/resumes execution after being in the `Paused` state.

Field Detail

display
Display display(Code)
	The `MIDlet`'s display object

Constructor Detail

StockMIDlet
public StockMIDlet() throws MIDletStateChangeException(Code)
	Default constructor that is called by the application manager to create a new instance of this `MIDlet` after which the `MIDlet` enters the `Paused` state.

Method Detail

destroyApp
public void destroyApp(boolean unconditional) throws MIDletStateChangeException(Code)
	When the application management software has determined that the `MIDlet` is no longer needed, or perhaps needs to make room for a higher priority application in memory, is signals the `MIDlet` that it is a candidate to be destroyed by invoking the `destroyApp(boolean)` method. In this case, we need to destroy the `RecordEnumeration`s so that we don't waste their memory and close the open `RecordStore`s. If the `RecordStore`s are empty, then we do not need them to be stored as they will be recreated on the next invokation of the `MIDlet` so we should delete them. At the end of our clean up, we must call `notifyDestroyed` which will inform the application management software that we are done cleaning up and have finished our execution and can now be safely terminated and enters the `Destroyed` state. Parameters: unconditional - If true when this method is called,the `MIDlet` mustcleanup and release all resources. If false the `MIDlet`may throw `MIDletStateChangeException` to indicate itdoes not want to be destroyed at this time. `MIDletStateChangeException`is thrown if the `MIDlet` wishes to continue toexecute (Not enter the `Destroyed` state). Thisexception is ignored if `unconditional` is equalto true. See Also: javax.microedition.midlet.MIDlet

pauseApp
public void pauseApp()(Code)
	This method is invoked by the application management software when the `MIDlet` no longer needs to be active. It is a stop signal for the `MIDlet` upon which the `MIDlet` should release any resources which can be re-acquired through the `startApp method which will be called upon re-activation of the MIDlet. The MIDlet enters the Paused state upon completion of this method.` `See Also: javax.microedition.midlet.MIDlet`

startApp

public void startApp()(Code)

This method is invoked when the MIDlet is ready to run and starts/resumes execution after being in the Paused state. The MIDlet acquires any resources it needs, enters the Active state and begins to perform its service, which in this case means it displays the main menu on the screen.

The method proceeds like so:

open the StockDatabase and the AlertDatabase

read the settings data from the settings RecordStore

create the string to be scrolled across the Ticker on the top of the screens and instantiate the Ticker object using that string. That string will be constructed of the names and prices of the stocks in our database

get and store the MIDlet's Display object

create and show the main menu

instantiate the TimerTask and Timer and associate the two setting the refresh interval to the value of the refresh_interval variable

MIDletStateChangeException is thrown if theMIDlet cannot start now but might be able tostart at a later time.
See Also: javax.microedition.midlet.MIDlet

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