Lunarphases

Referred to herein the following: Using Layout Managers Compound Borders Combo Boxes Multiple Images of the main frame of the program is as follows: // Create the phase selection and display panels.selectPanel = new JPanel (); displayPanel = new JPanel (); // Add various widgets to the sub panels.addWidgets (); // Create the main panel to contain the two sub panels.mainPanel = new JPanel (); mainPanel.setLayout (new BoxLayout (mainPanel, BoxLayout.PAGE_AXIS)); mainPanel.setBorder (BorderFactory .createemptyborder (5, 5, 5, 5)); // add the select and display panels to the main panel.mainpanel.add (selectpanel); mainpanel.add (displaypanel); it is also better to understand. Common layout managers include: BorderLayout, Boxlayout, FlowLayout, GridLayout, GridbagLayout and SpringLayout. Borders: selectPanel.setBorder (BorderFactory.createCompoundBorder (BorderFactory.createTitledBorder ( "Select Phase"), BorderFactory.createEmptyBorder (5,5,5,5))); drop-down box: JComboBox phaseChoices = null; ... // Create Combo Box with lunar phase choices.string [] Phases = {"New", "Waxing Crescent", "First Quarter", "Waying Gibbous", "Full", "WANING GIBBOUS", "Third Quarter", "WANING CRESCENT" }; phaseChoices = new JComboBox (phases); phaseChoices.setSelectedIndex (START_INDEX); drop down box event processing: phaseChoices.addActionListener (this); ... public void actionPerformed (ActionEvent event) {if ( "comboBoxChanged" .equals ( event.getActionCommand ())) {// Update the icon to display the new phase phaseIconLabel.setIcon (images [phaseChoices.getSelectedIndex ()]);}} multi-picture operation: final static int NUM_IMAGES = 8; final static int START_INDEX = 3;

Imageicon [] images = new imageicon [num_images]; ... // get the images and put the insto an array of imageicon.for (int i = 0; i

Import javax.swing. *;

Public class lunarphases implements an actionListener {

Final Static Int Num_images = 8;

Final static int start_index = 3;

Imageicon [] images = new imageicon [num_images];

JPanel Mainpanel, SelectPanel, DisplayPanel

JCOMBOBOX PHASECHOICES = NULL;

Jlabel PhaseiconLabel = NULL;

Public lunarphases () {

// Create a status selection panel and display panel.

SelectPanel = New jPanel ();

DisplayPanel = New jPanel ();

// Add the component to the sub-panel.

AddWidgets ();

// Creating the main panel to include the two panels above.

Mainpanel = new jpanel ();

Mainpanel.setLayout (New BoxLayout (Mainpanel, BoxLayout.page_AXIS);

Mainpanel.SetBorder (BorderFactory.createemptyBorder (5, 5, 5, 5));

// Add two sub-panels to the main panel.

Mainpanel.add (selectpanel);

Mainpanel.Add (DisplayPanel);

}

/ *

* Get the picture and install the component.

* /

Private void addwidgets () {

// Get the picture and put them in an imageicons array.

For (int I = 0; i

Images [i] = CreateImageicon ("/ images / image" ".jpg");

}

/ *

* Create a Label used to display the picture and give him a border.

* /

Phaseiconlabel = new jlabel ();

PhaseiconLabel.Sethorizontalalignment (jlabel.center);

Phaseiconlabel.setVerticalAlignment (jlabel.center);

Phaseiconlabel.setVerticalTextPosition (jlabel.center);

Phaseiconlabel.SethorizontalTextPosition (jlabel.center);

Phaseiconlabel.setBorder

Borderfactory.createCompoundBorder

BorderFactory.createloweredBevelBorder (),

Borderfactory.createemptyBorder (5, 5, 5, 5))));

Phaseiconlabel.setBorder

Borderfactory.createCompoundBorder

Borderfactory.createemptyBorder (0, 0, 10, 0),

PhaseiconLabel.getBorder ()));

// Create a Combo Box that can select the moon.

String [] Phases =

{

"New",

"Waxing Crescent",

"First quarter",

"Waxing Gibbous",

"Fulll",

"WANING GIBBOUS",

"Third quarter",

"WANING CRESCENT"}

Phasechoices = New JCOMBOBOX (PHASES);

Phasechoices.setSelectedIndex (start_index);

// Display the first pair of pictures.

Phaseiconlabel.seticon (images [start_index]);

Phaseiconlabel.setText ("");

// Add the border to the selection panel.

SelectPanel.setBorder

Borderfactory.createCompoundBorder

BorderFactory.createTitledborder ("SELECT PHASE"),

Borderfactory.createemptyBorder (5, 5, 5, 5))));

// Add the border to the display panel.

DisplayPanel.SetBorder

Borderfactory.createCompoundBorder

BorderFactory.createTitledborder ("Display Phase"),

Borderfactory.createemptyBorder (5, 5, 5, 5))));

// Increase the COMBO BOX to the Select Panel and the image label to the display panel.

DisplayPanel.Add (PhaseiconLabel);

SelectPanel.Add (Phasechoices);

// Add events to Combo Box.

Phasechoices.AddActionListener (this);

}

Public void actionPerformed (ACTIONEvent Event) {

IF ("ComboBoxChanged" .equals (event.getActioncommand ())) {

// Update the icon to display a new state.

Phaseiconlabel.seticon (images [phasechoices.getSelected ");

}

}

/ ** RETURNS An Imageicon, or Null IF The Path Was INVALID. * /

protected static imageicon createImageicon (String path) {

Java.net.url imageurl = lunarphases.class.getResource (path);

IF (ImageURL == NULL) {

System.err.Println ("Resource Not Found: PATH);

Return NULL;

} else {return new imageicon (imageURL);

}

}

/ **

* Create a graphical user interface to display, in order to be safe, use Event-Dispatching Thread call

* /

Private static void createandshowgui () {

// make Sure WE Have Nice Window Decorations.

Jframe.SetDefault (TRUE);

// CREATE A NEW Instance of Lunarphases.

Lunarphases Phases = New Lunarphases ();

// Create and set up the window.

JFrame LunarphaseSframe = New Jframe ("Lunar Phases");

LunarphaseSframe.SetDefaultCloseOperation (jframe.exit_on_close);

LunarphaseSframe.SetContentpane (Phases.Mainpanel);

// display the window.

LunarphaseSframe.PACK ();

LunarphaseSframe.setVisible (TRUE);

}

Public static void main (String [] args) {

// Schedule a Job for the event-dispatch thread:

// CREATING AND Showing this Application's GUI.

Javax.swing.swingutilities.Invokelater (new runnable () {

Public void run () {

CreateandShowgui ();

}

});

}

}