browser.java

简略的浏览器

import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
public class browser
{
	public static void main(String args[])
	{
		new win();
	}
}
class win extends Frame implements ActionListener,Runnable
{
	Button button;
	URL url;
	TextField text;
	JEditorPane editpane;
	byte b[]=new byte[118];
	Thread thread;
	public win()
	{
		text=new TextField(20);
		editpane=new JEditorPane();
		editpane.setEditable(false);
		button=new Button("确定");
		button.addActionListener(this);
		thread=new Thread(this);
		Panel p=new Panel();
		p.add(new Label("输入网址:"));
		p.add(text);
		p.add(button);
		ScrollPane scroll=new ScrollPane();
		scroll.add(editpane);
		add(scroll,BorderLayout.CENTER);
		add(p,BorderLayout.NORTH);
		setBounds(160,60,800,600);
		setVisible(true);
		validate();
		editpane.addHyperlinkListener(new HyperlinkListener()
		{
			public void hyperlinkUpdate(HyperlinkEvent ee)
			{
				if(ee.getEventType()==HyperlinkEvent.EventType.ACTIVATED)
				{
					try{editpane.setPage(ee.getURL());
					}
					catch(IOException eee)
					{
						editpane.setText(""+eee);
					}
				}
			}
		});
		addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		});
	}
	public void actionPerformed(ActionEvent e)
	{
		if(!(thread.isAlive()))
		thread=new Thread(this);
		try{thread.start();
		}
		catch(Exception ee)
		{
			text.setText("我正在读取"+url);
		}
	}
	public void run()
	{
		try{
			int n=-1;
			editpane.setText(null);
			url=new URL(text.getText().trim());
			editpane.setPage(url);
		}
		catch(Exception eee)
		{
			text.setText(""+eee);
			return;
		}
	}
}