FrameLayoutURLReader.java

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

import java.net.*;
import java.io.*;

public class FrameLayoutURLReader extends JFrame implements ActionListener {

   public JTextField urlTextField = new JTextField("Enter a valid URL");//Text field for a URL
   public JTextArea urlTextArea = new JTextArea(400, 300);//Text area for our HTML Code
   public JScrollPane urlScrollTextArea = new JScrollPane(urlTextArea);//Make it so our text area can scroll
   public JButton go = new JButton("Go");//Make a button

   public static void main(String args[]) {
      FrameLayoutURLReader application = new FrameLayoutURLReader("Get URL");    // construct a get
      application.resize(600, 600);             // resize the frame
      application.show();                       // show the frame
   }


   public FrameLayoutURLReader( String title) {
      super(title);
      JPanel centerPanel = new JPanel();//Construct center panel
      JPanel northPanel = new JPanel();//Construct northern panel
      //START CENTER SETUP -------------
      centerPanel.setLayout(new GridLayout(1, 1));//Set layout of center pane to grid layout
      centerPanel.add(urlScrollTextArea);//add our scrollable panel to the center
      //END CENTER SETUP -------------
      //START NORTH SETUP -------------
      northPanel.setLayout(new GridLayout(1, 2));//Set layout for one column, two rows
      go.addActionListener(this);//add the action listener
      northPanel.add(urlTextField);//We want the text field to be on the left so we add it first
      northPanel.add(go);//add the go button
      //END NORTH SETUP -------------
      //Finaly put all the panels onto the Applet panel.
      this.setLayout(new BorderLayout());//We want it in a border layout
      this.add("Center", centerPanel);//Set centerpanel as the center
      this.add("North", northPanel);//Set northpanel as the north
   }
   public void  actionPerformed (ActionEvent e) {
      readURL();//This will be called when we press the go button
   }   // end of Action Performed
   public void readURL() {
      System.out.println("READURL");
      URL destinationURL = null;//Declare a new URL for our program to go
      InputStreamReader dis = null;//Declare a DataInputSteram which connects our program to the internet
      BufferedReader reader = null;//Make a reader which will read the HTML line by line
      try {
         destinationURL = new URL("http://" + urlTextField.getText());//Set the URL's location
         dis = new InputStreamReader(destinationURL.openStream());// open a stream to our URL and put the data in dis
         reader = new BufferedReader(dis);//Construct the reader to read from the input stream
         String line = "";//Make a blank string
         while (line != null) { //Read until line is null
            urlTextArea.append(line + "\n");//Add the line to our text area
            line = reader.readLine();//Read the next line
         }
      } catch (Exception e) {
         e.printStackTrace();//If any errors happen, print them out
      }
   }

}  // End of Class