浏览器雏形代码

package explorer;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;

import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
/**
 * java浏览器雏形
 * @author tiger
 */
@SuppressWarnings("serial")
public class TigerExplorer extends JFrame{

	
	private JTextField field ;
	private JEditorPane pane;
	
	
	public TigerExplorer(String defaultUrl) {
		field = new JTextField(defaultUrl, 40);
		JToolBar bar = new JToolBar();
		bar.add(new JLabel("Location:"));
		bar.add(field);
		
		pane = new JEditorPane();
		pane.setEditable(false);
		
		this.setTitle("tiger explorer");
		Container contentpane = this.getContentPane();
		contentpane.add(bar, BorderLayout.NORTH);
		contentpane.add(new JScrollPane(pane), BorderLayout.CENTER);
		
		
		this.setSize(600, 400);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		field.addActionListener(
			new ActionListener(){
				public void actionPerformed(ActionEvent e) {
					openUrl(e.getActionCommand());
				}
			}
		);
		
		pane.addHyperlinkListener(new LinkActivator());
		
		openUrl(defaultUrl);
	}
	
	
	
	private void openUrl(String urlString) {
		if(urlString == null || urlString.trim().length() == 0)
		{
			return;
		}
		if(!urlString.startsWith("http://"))
		{
			urlString = "http://" + urlString;
		}
		
		try {
			URL url = new URL(urlString);
			pane.setPage(url);
			field.setText(url.toExternalForm());
		} catch (Exception e) {
			System.out.println("Couldn't open " + urlString + " : " + e);
			pane.setText("Couldn't open " + urlString + " : " + e); 
		}
	}
	
	
	class LinkActivator implements HyperlinkListener
	{
		public void hyperlinkUpdate(HyperlinkEvent e) {
			if(e.getEventType() == HyperlinkEvent.EventType.ACTIVATED)
			{
				openUrl(e.getURL().toExternalForm());
			}
		}
	}
	
	
	public static void main(String[] args) {
		String defaultUrl = "";
		new TigerExplorer(defaultUrl).setVisible(true);
	}


}