dynashow.java

介绍有关java的资料 课件 相当一本书籍 里面都是很基础的知识

/**
 * Title:        Java网络编程演示
 * Description:  Java网络编程演示，用于北京师范大学计算机系Java课程教学示范。
 * Copyright:    Copyright (c) 2001
 * Company:      北京师范大学计算机系
 * @author 孙一林
 * @version 1.0
 */
		import java.io.*;
		import java.net.*;
		import java.awt.*;
		import java.applet.*;
		public class dynashow extends java.applet.Applet
			implements Runnable {
			Thread dthread;
			URL fileur;
			TextArea showarea = new TextArea("Wait for a while...",00,100);
			public void init() {
				String url = " http://www.bnu.edu.cn/index.html";
				try {
					fileur = new URL(url);
				}
				catch ( MalformedURLException e) {
					System.out.println("Can't open the URL: " );
				}
				add(showarea);
			}
			public void start() {
				if (dthread == null) {
					dthread = new Thread(this);
					dthread.start();
				}
			}
			public void stop() {
				if (dthread != null) {
					dthread.stop();
					dthread = null;
				}
			}
			public void run() {
				InputStream filecon = null;
				DataInputStream filedata = null;
				String fileline;
				while(true) {
					try {
						filecon = fileur.openStream();
						filedata = new DataInputStream(filecon);
						while ((fileline = filedata.readLine()) != null) {
							showarea.setText(fileline+"\n");//.appendText(fileline+"\n");
						}
					}
					catch (IOException e) {
						System.out.println("Error in I/O:" + e.getMessage());
					}
					try {
						dthread.sleep(5000);
					}
					catch (InterruptedException e) { }
					repaint();
				}
			}
		}