Java file using Applet

Read a file using Applet

import java.applet.*;

import java.awt.*;

import java.io.*;

import java.net.*;

public class readFileApplet extends Applet

{

   String fileToRead = "test1.txt";

   StringBuffer strBuff;

   TextArea txtArea;

   Graphics g;

   public void init()

   {

      txtArea = new TextArea(100, 100);

      txtArea.setEditable(false);

      add(txtArea, "center");

      String prHtml = this.getParameter("fileToRead");

      if (prHtml != null) fileToRead = new String(prHtml);  

      readFile();

   }

   public void readFile()

   {

      String line;

      URL url = null;

      try

      {

         url = new URL(getCodeBase(), fileToRead);

      }

      catch(MalformedURLException e){}

      try

        {

         InputStream in = url.openStream();

         BufferedReader bf = new BufferedReader

         (new InputStreamReader(in));

         strBuff = new StringBuffer();

         while((line = bf.readLine()) != null)

         {

            strBuff.append(line + "\n");

         }

         txtArea.append("File Name : " + fileToRead + "\n");

         txtArea.append(strBuff.toString());

      }

      catch(IOException e)

     {

      e.printStackTrace();

   }

 }

}

Write to a file using Applet

import java.io.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import java.applet.Applet;

import java.net.*;

public class WriteFile extends Applet

 {

   Button write = new Button("WriteToFile");

   Label label1 = new Label("Enter the file name:");

   TextField text = new TextField(20);

   Label label2 = new Label("Write your text:");

   TextArea area = new TextArea(10,20);

   public void init()

    {

      add(label1);

      label1.setBackground(Color.lightGray);

      add(text);

      add(label2);

      label2.setBackground(Color.lightGray);

      add(area);

      add(write,BorderLayout.center);

      write.addActionListener(new ActionListener ()

      {

        public void actionPerformed(ActionEvent e)

        {

           new WriteText();

        }

     }

   );

}

public class WriteText 

 {

   WriteText()

     {

      try 

         {

         String str = text.getText();

         if(str.equals(""))

          {

           JOptionPane.showMessageDialog(null,"Please enter the file name!");

            text.requestFocus();

         }

         else

           {

            File f = new File(str);

            if(f.exists())

            {

               BufferedWriter out = new 

               BufferedWriter(new FileWriter(f,true));

               if(area.getText().equals(""))

                {

                  JOptionPane.showMessageDialog(null,"Please enter your text!");

                  area.requestFocus();

               }

               else

               {

                  out.write(area.getText());

                  if(f.canWrite())

                  {

                  JOptionPane.showMessageDialog(null, "Text is written in "+str);

                     text.setText("");

                     area.setText("");

                     text.requestFocus();

                  }

                  else

                  {

              JOptionPane.showMessageDialog(null,"Text isn't written in "+str);

                  }

                  out.close();

                  }

               }

               else

                 {

                  JOptionPane.showMessageDialog

                  (null,"File not found!");

                  text.setText("");

                  text.requestFocus();

               }

            }

         }

         catch(Exception x)

         {

            x.printStackTrace();

         }

      }

   }

}