siteselector.java

东西比较杂

/**
 * 
 */
package com.tiankong;
import java.net.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.applet.AppletContext;
/**
 * @author Administrator
 *
 */
public class SiteSelector extends JApplet{
	private Hashtable sites;
	private Vector siteNames;
	public void init(){
		sites=new Hashtable();
		siteNames=new Vector();
		getSitesFromHTMLParameters();
		Container c=getContentPane();
		c.add(new JLabel("Choose a site to brower"),BorderLayout.NORTH);
		final JList siteChooser =new JList(siteNames);
		siteChooser.addListSelectionListener(new ListSelectionListener(){
			public void valueChanged(ListSelectionEvent e){
				Object o=siteChooser.getSelectedValue();
				URL newDocument=(URL)sites.get(o);
				AppletContext brower=getAppletContext();
				brower.showDocument(newDocument);
			}
		});
		c.add(new JScrollPane(siteChooser),BorderLayout.CENTER);
	}
	private void getSitesFromHTMLParameters(){
		String title ,location;
		URL url;
		int counter=0;
		while(true){
			title=getParameter("title"+counter);
			if(title!=null){
				location=getParameter("location"+counter);
				try{
					url=new URL(location);
					sites.put(title, url);
					siteNames.addElement(title);
				}catch(MalformedURLException e){
					e.printStackTrace();
				}
			}
			else 
				break;
			++counter;
		}
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

}