splash.java

数据库管理类

package app.splash;
import app.login.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Splash extends JFrame
 { Toolkit toolkit=Toolkit.getDefaultToolkit();
   Window window;
   Image image;
  static public void main(String[] args)
    { JFrame f1=new Splash();
       
       f1.show();
      }
public Splash()
 { ImageCanvas canvas;
   window=new Window(this);
   image=toolkit.getImage("images/Splash.jpg");
   canvas=new ImageCanvas(image);
   window.add(canvas,"Center");
   Dimension scrnSize=toolkit.getScreenSize();
   int imgWidth=image.getWidth(this),
       imgHeight=image.getHeight(this);
   window.setLocation(scrnSize.width/2-(imgWidth/2),
                      scrnSize.height/2-(imgHeight/2));
   window.setSize(imgWidth,imgHeight);
   window.show();
   window.toFront();
   try{Thread.currentThread().sleep(3000);}
   catch(Exception e) {e.printStackTrace();}
   window.dispose();
 
  }
 }
class ImageCanvas extends Canvas 
 { private Image image;
   public ImageCanvas(Image image)
    { MediaTracker mt=new MediaTracker(this);
      mt.addImage(image,0);
      try{mt.waitForID(0);}
      catch(Exception e) {e.printStackTrace();}
      this.image=image;
     }
    public void paint(Graphics g)
     {g.drawImage(image,0,0,this);
     }
    public void update(Graphics g)
     {paint(g);
     }
    public Dimension getPreferredSize()
     { return new Dimension(image.getWidth(this),
                            image.getHeight(this));
     }
  }