Java6实现闪屏窗口 Splash Screen详解编程语言

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(); 
  } 
}