textArea.replaceSelection(selection.toLowerCase());
textArea.setSelectedText(selection.toLowerCase());
	public void actionPerformed(ActionEvent evt)	{		View view = getView(evt);		JEditTextArea textArea = view.getTextArea();		String selection = textArea.getSelectedText();		if(selection != null)			textArea.replaceSelection(selection.toLowerCase());		else			view.getToolkit().beep();	}