import java.awt.Color;
import java.awt.Toolkit;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JProgressBar;
import javax.swing.JWindow;


public class Demo extends JWindow implements Runnable {

    // 定義加載視窗大小
    public static final int LOAD_WIDTH 
 
= 200;
    public static final int LOAD_HEIGHT = 40;
    // 獲取屏幕視窗大小
    public static final int WIDTH = Toolkit.getDefaultToolkit().getScreenSize().width;
    public static final int HEIGHT = Toolkit.getDefaultToolkit().getScreenSize().height;
    // 定義進度條組件
    public JProgressBar progressbar;
    // 定義標籤組
 
件
    public JLabel label;

    // 構造函數
    public Demo() {
// 創建標籤
        label = new JLabel("數據加載中，請稍後！！！！");
        label.setBounds(0, 0,LOAD_WIDTH , LOAD_HEIGHT - 15);
// 創建進度條
        progressbar = new JProgressBar();
// 顯示當前進度值資訊
        progressbar.setStringPainted(true);
// 設置進度條邊框不顯示
        progressbar
 
.setBorderPainted(false);
// 設置進度條的前景色
        progressbar.setForeground(new Color(0, 200, 30));
// 設置進度條的背景色
        progressbar.setBackground(new Color(168, 200, 198));
        progressbar.setBounds(0, LOAD_HEIGHT - 15, LOAD_WIDTH, 15);
// 新增組件
        this.add(label);
        this.add(progressbar);
// 設置佈局為空
        this.setLayout(null);
// 設置視窗初始位置
        this.setLocation((WIDTH - LOAD_WIDTH) / 2, (HEIGHT - LOAD_HEIGHT) / 2);
// 設置視窗大小
        this.setSize(LOAD_WIDTH, LOAD_HEIGHT);
// 設置視窗顯示
        this.setVisible(true);

    }

    public static void main(String[] args) {
        Demo t = new Demo();
        new Thread(t).start();
    }

    public void run() {

        for (int i = 0; i < 100; i++) {
            try { Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            progressbar.setValue(i);
        }
        JOptionPane.showMessageDialog(this, "加載完成!!!");
        this.dispose();

    }

}