I created a virus or what ? [ LOL ]

Code:
import java.util.*;

import java.awt.event.*;

import javax.swing.*;

import java.awt.*;

import java.io.*;



import javax.swing.event.*;





public class fine extends JFrame implements ActionListener{

    

    private JMenuBar mu = new JMenuBar();

    private JMenu me = new JMenu("File");

    private JMenuItem muit = new JMenuItem("new");

    private JMenuItem muit2 = new JMenuItem("open");

    private JMenuItem muit3 = new JMenuItem("save");

    private JTextArea tf = new  JTextArea(20 , 20);

    

    String s;

    

    public fine(){

        

        super("the title");

        setLayout(new FlowLayout());

        getContentPane().setBackground(Color.GREEN);

        me.add(muit);

        me.add(muit2);

        me.add(muit3);

        mu.add(me);

        add(mu);

    

        

        JScrollPane scroller = new JScrollPane(tf);  

        JScrollBar bar = new JScrollBar();  

        scroller.add(bar);

        

        add(tf);

        

        setVisible(true);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setSize(150,100);

        

        

        

        muit2.addActionListener(this);

        muit3.addActionListener(this);

    }

    

    public void actionPerformed(ActionEvent ev){

        

        

        

         s = ev.getActionCommand();

        

        if(s == "new"){

            

            String k = null;

            tf.append(k);

        }

        

        

         if(s == "save"){



                JFileChooser chooser = new JFileChooser();

                

                chooser.showSaveDialog(this);  

                loadFile2(chooser.getSelectedFile());

         }

        if(s =="open"){

            

            JFileChooser chooser = new JFileChooser();

            

            chooser.showOpenDialog(this);  

            loadFile(chooser.getSelectedFile());  

        }

    }

    

        private void loadFile(File file) {  

        

            try {  

                

                FileInputStream fi2 = new FileInputStream(file);

                BufferedReader reader = new BufferedReader(new FileReader(file));  

                String line = null;  

                while ((line = reader.readLine()) != null) {  

                tf.append(line);

                }  

                reader.close();  

      

            } catch(Exception ex) {  

                System.out.println("couldn't read the card file");  

                ex.printStackTrace();  

    }

            

    

              

                    

               }

        

               public void loadFile2(File file){

                  

                  

              

               try {

                   FileOutputStream fo = new FileOutputStream(file);

              

                   BufferedWriter writer = new BufferedWriter(new FileWriter(file));

                              

                      writer.write(tf.getText());

                

                  

                  writer.close();

               }

               catch(Exception e){

               }

              

        }

    public static void main(String args[]){

        

        fine fi = new fine();

        

    }

}