Examples of java.awt.SplashScreen

java.awt.SplashScreen
The splash screen can be created at application startup, before the Java Virtual Machine (JVM) starts. The splash screen is displayed as an undecorated window containing an image. You can use GIF, JPEG, and PNG files for the image. Animation (for GIF) and transparency (for GIF, PNG) are supported. The window is positioned at the center of the screen (the position on multi-monitor systems is not specified - it is platform and implementation dependent). The window is closed automatically as soon as the first window is displayed by Swing/AWT (may be also closed manually using the Java API, see below).
There are two ways to show the native splash screen:
- If your application is run from the command line or from a shortcut, use the "-splash:" Java application launcher option to show a splash screen.
  For example:
```
 java -splash:filename.gif Test 
```
- If your application is packaged in a jar file, you can use the "SplashScreen-Image" option in a manifest file to show a splash screen. Place the image in the jar archive and specify the path in the option. The path should not have a leading slash.
  For example, in the manifest.mf file:
```
 Manifest-Version: 1.0 Main-Class: Test SplashScreen-Image: filename.gif 
```
  The command line interface has higher precedence over the manifest setting.
The {@code SplashScreen} class provides the API for controlling the splash screen. This class may be used to close the splash screen, change the splash screen image, get the image position/size and paint in the splash screen. It cannot be used to create the splash screen; you should use the command line or manifest file option for that.
This class cannot be instantiated. Only a single instance of this class can exist, and it may be obtained using the {@link #getSplashScreen()}static method. In case the splash screen has not been created at application startup via the command line or manifest file option, the getSplashScreen method returns null. @author Oleg Semenov @since 1.6

   */
  private static final Class<?>[] PARAMETERS = new Class[] { URL.class };




  public static void main(String[] args) {
    final SplashScreen splash = SplashScreen.getSplashScreen();


    File libFolder = new File("ext");
    List<File> jars = findJars(libFolder.getAbsoluteFile());


    // sort the jars by name and then reverse the order so the newer version

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   * Parameters of the method to add an URL to the System classes.
   */
  private static final Class<?>[] PARAMETERS = new Class[] { URL.class };


  public static void main(String[] args) {
    final SplashScreen splash = SplashScreen.getSplashScreen();


    File libFolder = new File("ext");
    List<File> jars = findJars(libFolder.getAbsoluteFile());


    // sort the jars by name and then reverse the order so the newer version

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        }


    }


    public void updateSplash(String s){
        SplashScreen splash = SplashScreen.getSplashScreen();
        if (splash != null){


            Graphics g = splash.createGraphics();
            g.setColor(Color.WHITE);
            g.fillRect(110, 105, 500, 500);
            g.setColor(Color.BLACK);
            g.drawString(s, 120, 120);
            g.dispose();


            try{
                splash.update();
            }catch(IllegalStateException e){
                // ignore
            }


        }

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            }
        }).start();
    }


    private void updateProgress(SplashScreenStages stage) {
        SplashScreen ss = SplashScreen.getSplashScreen();
        if (ss != null) {
            Graphics2D ssg = ss.createGraphics();
            ssg.setComposite(AlphaComposite.Clear);
            ssg.fillRect(450, GameCanvas.PREFERRED_SIZE.height - 70,
                    GameCanvas.PREFERRED_SIZE.width,
                    GameCanvas.PREFERRED_SIZE.height);
            ssg.setPaintMode();


            Font f = new Font("Courier", Font.BOLD, 14);
            ssg.setFont(f);
            FontMetrics fm = ssg.getFontMetrics(f);


            ssg.drawString(stage.getMessage(), 450,
                    GameCanvas.PREFERRED_SIZE.height - 40
                            - (fm.getMaxAscent() + fm.getMaxDescent()));
            ss.update();
        }
    }

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     */
    @Override
    public void lifecycleEvent(LifecycleEvent event) {
        if(event.getType().equals(Lifecycle.AFTER_START_EVENT)) {
            if(!GraphicsEnvironment.isHeadless()) {
                SplashScreen splashScreen = SplashScreen.getSplashScreen();
                if(splashScreen != null) {
                    try {
                        splashScreen.close();
                    } catch (IllegalStateException e) {
                        
                    }
                }
            }

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     */
    @Override
    public void lifecycleEvent(LifecycleEvent event) {
        if(event.getType().equals(Lifecycle.AFTER_START_EVENT)) {
            if(!GraphicsEnvironment.isHeadless()) {
                SplashScreen splashScreen = SplashScreen.getSplashScreen();
                if(splashScreen != null) {
                    try {
                        splashScreen.close();
                    } catch (IllegalStateException e) {
                        
                    }
                }
            }

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  @NonBlocking
  public void boot() {
    SwingUtilities.invokeLater( new Runnable() {
      @Override
      public void run() {
        final SplashScreen splash = SplashScreen.getSplashScreen();
        if ( splash == null ) {
          return;
        }


        application.updateSplash( splash );

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         System.exit(2);
      }
   }


   private static void closeSplashScreen(long untilMs) throws InterruptedException {
      SplashScreen screen = SplashScreen.getSplashScreen();
      if (screen != null) {
         long splashWaitMs = untilMs - System.currentTimeMillis();
         if (splashWaitMs > 0) {
            Thread.sleep(splashWaitMs);
         }
         screen.close();
      }
   }

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