title: Writing to an already existing file using FileWriter Java
body: <p>Is there anyway I can write to an already existing file using Filewriter</p>
  
  <p>For example when the user clicks a submit button:</p>
  
  <pre><code>FileWriter writer = new FileWriter("myfile.csv");
  writer.append("LastName");
  writer.append(',');
  writer.append("FirstName");
  writer.append('/n');
  
  writer.append(LastNameTextField.getText());
  writer.append(',');
  writer.append(FirstNameTextField.getText());
  </code></pre>
  
  <p>I want to be able to write new data into the already existing myfile.csv without having to recreate a brand new one every time</p>