Package examples

Class LocalStorageExample1

java.lang.Object

org.jdesktop.application.AbstractBean

org.jdesktop.application.Application

examples.LocalStorageExample1

public class LocalStorageExample1
extends Application

A simple demonstration of the LocalStorage class: loads and saves a LinkedHashMap (a HashMap whose entries have a stable order). To try it, add some entries to the Map by pressing the "Add Random Entry" button or by entering key/value strings in the corresponding text fields. Then save the Map (to a file), clear, and load the saved Map. with the corresponding buttons.

The map is saved with the LocalStorage save method like this:

 LinkedHashMap<String, String> map = listModel.getMap();
 ApplicationContext.getInstance().getLocalStorage().save(map, "map.xml");
 

And loaded with the LocalStorage load method like this:

 Object map = ApplicationContext.getInstance().getLocalStorage().load("map.xml");
 listModel.setMap((LinkedHashMap<String, String>)map);
 

The LocalStorage.save/load methods can be applied to anything supported by Java Beans Persistence, i.e. any Java Bean as well as most of the primitive and utility Java classes. The LocalStorage.save method is implemented with the XMLEncoder class and the LocalStorage.load method with the XMLDecoder class. Take a look at the contents of "map.xml" by cut and pasting the complete pathname from the bottom of the GUI into your favorite text editor.

See Also:

ApplicationContext.getLocalStorage(), LocalStorage.load(java.lang.String), LocalStorage.save(java.lang.Object, java.lang.String)

Nested Class Summary

Nested classes/interfaces inherited from class org.jdesktop.application.Application

Application.ExitListener

Constructor Summary

Constructors

Constructor	Description
LocalStorageExample1()

Method Summary

Modifier and Type	Method	Description
void	addKeyValueEntry()
void	addRandomEntry()
void	clearMap()
void	loadMap()
static void	main(java.lang.String[] args)
void	saveMap()
protected void	startup()	Responsible for starting the application; for creating and showing the initial GUI.

Methods inherited from class org.jdesktop.application.AbstractBean

addPropertyChangeListener, addPropertyChangeListener, firePropertyChange, firePropertyChange, getPropertyChangeListeners, removePropertyChangeListener, removePropertyChangeListener

Methods inherited from class org.jdesktop.application.Application

addExitListener, end, exit, exit, getContext, getExitListeners, getInstance, getInstance, hide, initialize, launch, quit, ready, removeExitListener, show, shutdown

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalStorageExample1

public LocalStorageExample1()

Method Detail

addKeyValueEntry

@Action
public void addKeyValueEntry()

addRandomEntry

@Action
public void addRandomEntry()

clearMap

@Action
public void clearMap()

loadMap

@Action
public void loadMap()
             throws java.io.IOException

Throws:

java.io.IOException

saveMap

@Action
public void saveMap()
             throws java.io.IOException

Throws:

java.io.IOException

startup

protected void startup()

Description copied from class: Application

Responsible for starting the application; for creating and showing the initial GUI.

This method is called by the static launch method, subclasses must override it. It runs on the event dispatching thread.

Specified by:

startup in class Application

See Also:

Application.launch(java.lang.Class<T>, java.lang.String[]), Application.initialize(java.lang.String[]), Application.shutdown()

main

public static void main(java.lang.String[] args)