通过URL 自己做的浏览器 - 黑马程序员技术交流社区

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import java.net.*;
class MyIEGui
{
private static Frame f;
private static Button but;
private static TextField tf;
private static Dialog dl;
private static Label lab;
private static Button okbut;
private static TextArea ta;
public static void main(String[] args)
{
init();
}
private static void init()
{
  f=new Frame("my window");
  f.setBounds(300,200,500,400);
  f.setLayout(new FlowLayout());
  but=new Button("转到");
  tf=new TextField(53);
  ta=new TextArea(19,60);
  f.add(tf);
  f.add(but);
  f.add(ta);
  dl=new Dialog(f,"错误信息",true);
  dl.setBounds(350,250,240,120);
  dl.setLayout(new FlowLayout());
  lab=new Label();
  okbut=new Button("确定");
  dl.add(lab);
  dl.add(okbut);
  event();
  f.setVisible(true);
}
private static void event()
{
   tf.addKeyListener(new KeyAdapter(){
  public void keyPressed(KeyEvent e)
{
if(e.getKeyCode()==KeyEvent.VK_ENTER)
  {
   try
   {
show();
   }
   catch (Exception ee)
   {
   throw new RuntimeException("路径错误");
   }

  }
  }
  });
  okbut.addKeyListener(new KeyAdapter(){
  public void keyPressed(KeyEvent e)
{
if(e.getKeyCode()==KeyEvent.VK_ENTER)
{
   try
   {
show();
   }
   catch (Exception es)
   {
   throw new RuntimeException("路径错误");
   }

}
  }
  });
  f.addWindowListener(new WindowAdapter(){
  public void windowClosing(WindowEvent e)
{
System.exit(0);
}
  });
  dl.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
dl.setVisible(false);
}
} );
  okbut.addActionListener(new ActionListener(){
  public void actionPerformed(ActionEvent e)
{
dl.setVisible(false);
  }
  });
  but.addActionListener(new ActionListener(){
  public void actionPerformed(ActionEvent e){
   try
   {
show();
   }
   catch (Exception ex)
   {
   throw new RuntimeException("路径错误");
   }

  }
  });

}
private static void show()throws Exception
{
  ta.setText("");
  String urlpath=tf.getText();//获取输入框信息http://127.0.0.1:8080/myweb/demo.html
  URL url=new URL(urlpath);
  URLConnection conn=url.openConnection();//它表示到 URL 所引用的远程对象的连接。
  InputStream ins=conn.getInputStream();//获取连接读取的输入流
  byte[] by=new byte[1024*1024*100];
  int len=ins.read(by);
  ta.append(new String(by,0,len));