/**
 * Converts the selected hexidecimal sequence to the equivalent characters.
 */
Selection[] selection = textArea.getSelection();
String s = textArea.getSelectedText(selection[0]).replaceAll("\\s","");
StringBuffer sb = new StringBuffer();
for (int i = 0; i+1 < s.length(); i += 2) {
	sb.append(""+(char) Integer.parseInt(s.substring(i,i+2),16));
}
textArea.setSelectedText(selection[0],sb.toString());