aboutframe.java

java 多线程文件下载器源代码......

package com.sam.net.download;

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

public class AboutFrame extends JFrame{
	public AboutFrame() {
		super("关于我们...");
		setSize(400,200);
		setResizable(false);
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

		Pane pane = new Pane();
		getContentPane().setBackground(Color.white);
		getContentPane().setLayout(new BorderLayout());
		getContentPane().add(pane,"Center");
		show();
	}
}

class Pane extends JPanel implements Runnable {
	private Image body;
	private Thread runner;
	private int y;
	private String[] msg;

	public Pane() {
		Toolkit tk = (Toolkit)Toolkit.getDefaultToolkit();
		body = (Image)tk.getImage(getClass().getResource("images/google.gif"));
		
		this.msg = new String[] {
			
			"程序设计：sam_chen <[e-mail]>",
			"完成日期：2008 年 11 月",
			"",
			"该软件完全仿照下载工具迅雷5制作",
			"软件中，有许多图片和模板的版权属于原作者所有。",
			"",
			"该软件仅供 Java 程序员学习研究使用，不能",
			"用于任何商业应用。"
		};
		this.y=msg.length*20-80;

		if (this.runner==null) {
			this.runner=new Thread(this);
			this.runner.start();
		}
	}
	public void paintComponent(Graphics g) {
		Graphics2D comp = (Graphics2D)g;
		comp.setColor(Color.white);
		comp.fillRect(0,0,this.getWidth(),this.getHeight());
		comp.setFont(new Font("宋体",0,12));

		// draw the shadow of message
		for (int m=0;m<3;m++) {
			int k=255-(m*100)/2;
			comp.setColor(new Color(k,k,k));
			for (int i=0;i<msg.length;i++) {
				comp.drawString(msg[i],135-m,y+5+i*20-m);
			}
		}

		// draw the title image
		comp.drawImage(body,0,this.getHeight() - this.body.getHeight(this),this);

		// draw the message
		comp.setColor(Color.blue);
		for (int i=0;i<msg.length;i++) {
			comp.drawString(msg[i],130,y+i*20);
		}
	}

	// method: move the message
	public void run() {
		try {
			while(true) {
				Thread.sleep(100);
				if (--y < - msg.length*20) y=this.getHeight()+20;
				repaint();
			}
		} catch (InterruptedException ignore) {}
	}
}