Entire Site
Free Trial
Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
- Create BookmarkCreate Bookmark
- Create Note or TagCreate Note or Tag
- DownloadDownload
- PrintPrint
CHAPTER 1: Getting a Jump Start in JavaF... > Understanding the Hello Earthrise Pr...
Understanding the Hello Earthrise Program
Now that you've run the application, let's walk through the program listing together. The code for the Hello Earthrise application is shown in Listing 1-1.
Listing 1-1. The HelloEarthRiseMain.java Program
/*
* HelloEarthRiseMain.java - A JavaFX "Hello World" style example
*
* Developed 2011 by James L. Weaver jim.weaver [at] javafxpert.com
* as a JavaFX SDK 2.0 example for the Pro JavaFX book.
*/
package projavafx.helloearthrise.ui;
import javafx.animation.Interpolator;
import javafx.animation.Timeline;
import javafx.animation.TranslateTransition;
import javafx.application.Application;
import javafx.builders.GroupBuilder;
import javafx.builders.ImageViewBuilder;
import javafx.builders.RectangleBuilder;
import javafx.builders.SceneBuilder;
import javafx.builders.TextBuilder;
import javafx.builders.TranslateTransitionBuilder;
import javafx.geometry.VPos;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.scene.text.Text;
import javafx.scene.text.TextAlignment;
import javafx.stage.Stage;
import javafx.util.Duration;
/**
* Main class for the "Hello World" style example
*/
public class HelloEarthRiseMain extends Application {
/**
* @param args the command-line arguments
*/
public static void main(String[] args) {
Application.launch(args);
}
@Override
public void start(Stage stage) {
String message =
"Earthrise at Christmas: " +
"[Forty] years ago this Christmas, a turbulent world " +
"looked to the heavens for a unique view of our home " +
"planet. This photo of Earthrise over the lunar horizon " +
"was taken by the Apollo 8 crew in December 1968, showing " +
"Earth for the first time as it appears from deep space. " +
"Astronauts Frank Borman, Jim Lovell and William Anders " +
"had become the first humans to leave Earth orbit, " +
"entering lunar orbit on Christmas Eve. In a historic live " +
"broadcast that night, the crew took turns reading from " +
"the Book of Genesis, closing with a holiday wish from " +
"Commander Borman: \"We close with good night, good luck, " +
"a Merry Christmas, and God bless all of you -- all of " +
"you on the good Earth.\"";
// Reference to the Text
Text textRef = TextBuilder.create()
.layoutY(100)
.textOrigin(VPos.TOP)
.textAlignment(TextAlignment.JUSTIFY)
.wrappingWidth(400)
.text(message)
.fill(Color.rgb(187, 195, 107))
.font(Font.font("SansSerif", FontWeight.BOLD, 24))
.build();
// Provides the animated scrolling behavior for the text
TranslateTransition transTransition = TranslateTransitionBuilder.create()
.duration(new Duration(75000))
.node(textRef)
.toY(-820)
.interpolator(Interpolator.LINEAR)
.cycleCount(Timeline.INDEFINITE)
.build();
Scene scene = SceneBuilder.create()
.width(516)
.height(387)
.root(
GroupBuilder.create()
.children(
ImageViewBuilder.create()
.image(new Image("http://projavafx.com/images/earthrise.jpg"))
.build(),
GroupBuilder.create()
.layoutX(50)
.layoutY(180)
.children(
textRef
)
.clip(
RectangleBuilder.create()
.width(430)
.height(85)
.build()
)
.build()
)
.build()
)
.build();
stage.setScene(scene);
stage.setTitle("Hello Earthrise");
stage.show();
// Start the text animation
transTransition.play();
}
}
- Create BookmarkCreate Bookmark
- Create Note or TagCreate Note or Tag
- DownloadDownload
- PrintPrint