import javax.swing.*;
import java.awt.*;
/*
JWindow 是一个能够在用户桌面的任何地方显示的容器。
所以能够使用它构成程序刚运行时的splash画面。
*/
public class ESplash extends JWindow implements Runnable {

private Thread thread = null;
private Image logo = null;
private Color bg_color = new Color(255, 255, 255);
private Toolkit toolkit =getToolkit();
private int image_width;
private int image_height;

public ESplash() {
logo = new ECreateIcon().getSplashImage();
loadImage(logo, 0);
image_width = logo.getWidth(this);
image_height = logo.getHeight(this);
setBackground(bg_color);
setCursor(new Cursor(3));
setSize(image_width + 10, image_height + 10);
//设置JWindow的显示位置
int Xpos = (toolkit.getScreenSize().width - getSize().width) / 2;
int Ypos = (toolkit.getScreenSize().height - getSize().height) / 2;
setBounds(Xpos, Ypos, getSize().width, getSize().height);
setVisible(true);
}
/*
通过使用MediaTracker加载图像，确保图像被正确的加载。
图像被加载后，将进行绘图。
*/
private void loadImage(Image image, int ID) {
if(image != null) {
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(image, ID);
try {
tracker.waitForID(ID);
}
catch(InterruptedException _ex) { }
}
}

/*
在JWindow部件上绘制图像。
*/

public void paint(Graphics g) {
g.drawImage(logo, 5, 5, image_width, image_height, this);

//设置字体的色彩
g.setColor(new Color(102, 102, 150));
g.drawString("正在初始化系统......", 7, getSize().height - 72);
//设置矩形框的背景色彩。
g.setColor(new Color(255, 255, 255));

//绘制矩形框
g.fillRect(5, getSize().height - 70, 317, 7);
g.drawRect(5, getSize().height - 70, 317, 7);

//重新设置将要填涂在矩形框中的颜色
g.setColor(new Color(102, 102, 150));
for(int n = 0; n < 317; n += 5)
try {
//线程休眠50毫秒
Thread.sleep(50L);
//填涂矩形框
g.fillRect(5, getSize().height - 70, n, 5);
}
catch(Exception _ex) { }
}

public void run() {
//设置鼠标为等待状态
setCursor(new Cursor(3));
repaint();
}

public void stop() {
//结束线程
thread = null;
logo = null;
}

//更新图形区，防止绘图时产生闪烁现象。

public void update(Graphics g) {
paint(g);
}
}

/////////////////////////////////////////////////////

import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;

public class ECreateIcon{

private static Image splashimage;

public ECreateIcon(){
splashimage = getImageFromResource("resources/images/Esplash.gif");
}
//获得图像
private Image getImageFromResource(String image_path) {
return Toolkit.getDefaultToolkit().getImage(image_path);
}

public ImageIcon createImageIcon(String filename) {
String path = "/resources/images/" + filename;
return new ImageIcon(getClass().getResource(path));
}

public Image getSplashImage() {
return splashimage;
}
}