com.nokia.midp.examples.lcdui.helloworldplus
Class HelloWorldPlusMIDlet

java.lang.Object
  javax.microedition.midlet.MIDlet
      com.nokia.midp.examples.lcdui.helloworldplus.HelloWorldPlusMIDlet

public class HelloWorldPlusMIDlet

extends javax.microedition.midlet.MIDlet

This class illustrates the implementation of a simple MIDlet that initially displays a "HelloWorld" message to the screen and allows the user to edit that message.

This class extends the class javax.microedition.midlet.MIDlet. It creates and maintains references to a TextScreen object and a TextEditor object.

Note that the HelloWorldMIDlet class has no constructor. MIDlet contructors are not required to do anything because intializing of the object is better performed in the startApp() method.

Field Summary

private javax.microedition.lcdui.Display	display A generic way of indicating whether startApp() has previously been called.
private TextEditor	textEditor Allows the user to edit the message displayed.
private TextScreen	textScreen Displays the message on the screen.

Fields inherited from class javax.microedition.midlet.MIDlet

Constructor Summary

HelloWorldPlusMIDlet()

Method Summary

void	destroyApp(boolean unconditional) No further implementation is required because the MIDlet holds no resources that require releasing.
void	exitRequested() A convenience method for exiting.
void	pauseApp() This must be defined but no implementation is required because the MIDlet only responds to user interaction.
void	startApp() Creates an instance of TextScreen if one has not already been created and tells the framework to set this instance of TextScreen as the current screen.
void	textEditorDone(java.lang.String string) Implements the transition from the TextEditor screen to the TextScreen screen.
void	textEditorRequested() Implements the transition from the TextScreen screen to the TextEditor screen.

Methods inherited from class javax.microedition.midlet.MIDlet

checkPermission, getAppProperty, notifyDestroyed, notifyPaused, platformRequest, resumeRequest

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

textScreen

private TextScreen textScreen

Displays the message on the screen.

textEditor

private TextEditor textEditor

Allows the user to edit the message displayed.

display

private javax.microedition.lcdui.Display display

A generic way of indicating whether startApp() has previously been called.

Constructor Detail

HelloWorldPlusMIDlet

public HelloWorldPlusMIDlet()

Method Detail

startApp

public void startApp()

Creates an instance of TextScreen if one has not already been created and tells the framework to set this instance of TextScreen as the current screen.

pauseApp

public void pauseApp()

This must be defined but no implementation is required because the MIDlet only responds to user interaction.

destroyApp

public void destroyApp(boolean unconditional)

No further implementation is required because the MIDlet holds no resources that require releasing.

Parameters:

unconditional - is ignored.

exitRequested

public void exitRequested()

A convenience method for exiting.

textEditorDone

public void textEditorDone(java.lang.String string)

Implements the transition from the TextEditor screen to the TextScreen screen.

Parameters:

string - is the new text to be displayed. It is null if the text is not to be changed.

textEditorRequested

public void textEditorRequested()

Implements the transition from the TextScreen screen to the TextEditor screen.