ohh VERY GOOD NEW I FOUND HOW TO MADE SAVE BUUTTON ON NOTEPAD !!!
HERE THE WAY

 // TODO add your handling code here:
        JFileChooser save = new JFileChooser();
       
        int option = save.showSaveDialog(this);
       
        if(option == JFileChooser.APPROVE_OPTION){
           
            try {
                BufferedWriter out = new BufferedWriter(new FileWriter(save.getSelectedFile().getPath()));
               
                out.write(this.jTextArea1.getText());
                out.close();
               
            }
            catch(Exception ex){
               
                System.out.println(ex.getMessage());
               
               
            }
           
        }



THANKS EVERYONE FOR HELPING ME