Por favor me Ajudemmmmm

import java.util.zip.*; 
import java.io.*; 
import javax.swing.*; 
import javax.swing.event.*; 
import java.awt.*; 
import java.awt.event.*; 
import java.util.Calendar; 
import java.util.GregorianCalendar; 
import java.text.DecimalFormat; 
import javax.swing.filechooser.FileView;

public class backup{ 
    
   public backup(){

       JFileChooser fc = new JFileChooser("c:\\");           
       fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);       
       fc.setDragEnabled(false); 
       fc.setApproveButtonMnemonic('S'); 
       fc.setApproveButtonToolTipText("Salvar Backup"); 
       fc.setApproveButtonText("Salvar"); 
       fc.setDialogTitle("Backup do Sistema"); 
       
     int result =fc.showSaveDialog(null); 

        if( result == JFileChooser.APPROVE_OPTION){ 
            
           File file = fc.getSelectedFile(); //local onde quero que salve o backup 
           
           if(file != null){ 
       
               
            byte[] buf = new byte[1024]; 
       
             try { 
                File f = new File("C:\\Teste");  // Pega todos os arquivos desse diretorio
                 String []filenames = f.list();
                 ZipOutputStream out = new ZipOutputStream(new FileOutputStream( file + getData() + ".zip")); 
          

                 for (int i=0; i<filenames.length; i++) { 
                     FileInputStream in = new FileInputStream("C:\\Teste"+"//"+filenames[i]); 
                     out.putNextEntry(new ZipEntry(filenames[i])); 

                  
                     int len; 
                     while ((len = in.read(buf)) > 0) { 
                         out.write(buf, 0, len); 
                     } 
                     out.closeEntry(); 
                     in.close(); 
                 } 
          
              
                 out.close(); 
                 JOptionPane.showMessageDialog(null, "Backup Criado com Sucesso", "Criando um Backup", JOptionPane.QUESTION_MESSAGE); 
                  
             } catch (IOException e) { 
                JOptionPane.showMessageDialog(null, "No Possivel Criar Backup - Tente Novamente", "", JOptionPane.ERROR_MESSAGE); 
                e.printStackTrace(); 
             } 
          
         } 
      } 
   } 
    
   public String getData(){ 
       
      Calendar cal = new GregorianCalendar(); 
       
      DecimalFormat dig = new DecimalFormat("00"); 
       
      return ("_" + dig.format( cal.get(Calendar.DAY_OF_MONTH)) + "_" + dig.format( cal.get(Calendar.MONTH) + 1) + "_" + dig.format( cal.get(Calendar.YEAR) - 2000)); 
   } 
}

File file = fc.getSelectedFile();

ZipOutputStream out = new ZipOutputStream(new FileOutputStream( file + getData() + ".zip"));