GWT: input textArea with character counter implementation

Below is the implementation for above picture. This is a method that creates custom text area that accepts 140 input characters only. As user types in characters the counter decrements/increments accordingly, when number of characters exceeds 140, the number color turns red as shown above.

private void buildTextMessageRow(final Object msg, VerticalPanel container)

    {

safeTextArea.setText("");

safeTextArea.addStyleName("myTextBoxStyle");

safeTextArea.setWidth("400px");

Row title = new Row(noWrapLabel("Enter your text message: (maximum 140 charachters)"), null);

container.add(title);

HorizontalPanel remainCharsPanel = new HorizontalPanel();

remainCharsPanel.add(new HTML("You have "));

final Label remainingCharsLabel = new Label("140");

remainCharsPanel.add(remainingCharsLabel);

remainCharsPanel.add(new HTML(" characters left."));

container.add(new Row(null, safeTextArea));

container.add(new Row(null, remainCharsPanel));

safeTextArea.addKeyPressHandler(new KeyPressHandler()

{

    public void onKeyPress(KeyPressEvent event)

    {

onTextAreaContentChanged(remainingCharsLabel);

    }

});

safeTextArea.addFocusHandler(new FocusHandler()

{

    public void onFocus(FocusEvent event)

    {

onTextAreaContentChanged(remainingCharsLabel);

    }

});

//onFocusLost previously

safeTextArea.addBlurHandler(new BlurHandler()

{

    public void onBlur(BlurEvent event)

    {

onTextAreaContentChanged(remainingCharsLabel);

    }

});

    }

    private void onTextAreaContentChanged(final Label remainingCharsLabel)

    {

int counter = new Integer(safeTextArea.getText().length()).intValue();

int charsRemaining = 140 - counter;

remainingCharsLabel.setText("" + charsRemaining);

if (charsRemaining >= 0)

{

    remainingCharsLabel.setStyleName("my_form_under_140_chars");

} else

    remainingCharsLabel.setStyleName("my_form_over_140_chars");

    }