To a file using Applet in java pgm

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();

         }

      }

   }

}