import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.net.*;

public class BrowserDemo extends Applet implements ActionListener
{
		//聲明開始瀏覽按鈕
    Button button;
    
    //聲明URL類對象url
    URL url;
    
    //聲明TextField類對象text
    TextField text;
	public BrowserDemo()
	{
      button = new Button("browse");   //創(chuàng)建按鈕
      text=new TextField(30);          //創(chuàng)建URL地址欄輸入框
      add(new Label("輸入網(wǎng)址："));    //創(chuàng)建標(biāo)簽并加入applet頁面中
      add(text);add(button);					//將按鈕及址欄輸入框加入到applet界面中
      button.addActionListener(this);
	}
 
 		//單擊按鈕的時(shí)間處理	
    public void actionPerformed(ActionEvent e)
    {
      if(e.getSource() == button)
      {
          try
          {
          	//創(chuàng)建URL類的對象url
              url=new URL(text.getText().trim());
          }
          catch(MalformedURLException g){text.setText("不正確的網(wǎng)址："+url);}
          
          //利用瀏覽器瀏覽網(wǎng)頁
          getAppletContext().showDocument(url);
      }
    }
}