Java6实现闪屏窗口 Splash Screen

import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics2D;
import java.awt.Menu;
import java.awt.MenuBar;
import java.awt.MenuItem;
import java.awt.SplashScreen;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
public class JDK6SplashTest extends Frame{
  static void renderSplashFrame(Graphics2D g,int frame) {
    final String[] comps = { "foo","bar","baz" };
    g.setComposite(AlphaComposite.Clear);
    g.fillRect(130,250,280,40);
    g.setPaintMode();
    g.setColor(Color.BLACK);
    g.drawString("Loading " + comps[(frame / 5) % 3] + "...",130,260);
    g.fillRect(130,270,(frame * 10) % 280,20);
  }
 
  public JDK6SplashTest() {
    super("SplashScreen demo");
    setSize(500,300);
    setLayout(new BorderLayout());
    Menu m1 = new Menu("File");
    MenuItem mi1 = new MenuItem("Exit");
    m1.add(mi1);
    mi1.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
        System.exit(0);
      }
       
    });
 
    MenuBar mb = new MenuBar();
    setMenuBar(mb);
    mb.add(m1);
    final SplashScreen splash = SplashScreen.getSplashScreen();
    if (splash == null) {
      System.out.println("SplashScreen.getSplashScreen() returned null");
      return;
    }
    Graphics2D g = (Graphics2D) splash.createGraphics();
    if (g == null) {
      System.out.println("g is null");
      return;
    }
    for (int i = 0; i < 100; i++) {
      renderSplashFrame(g,i);
      splash.update();
      try {
        Thread.sleep(200);
      } catch (InterruptedException e) {
      }
    }
    splash.close();
    setVisible(true);
    toFront();
  }
 
  public static void main(String args[]) {
    JDK6SplashTest test = new JDK6SplashTest();
  }
}