7,7c7,7
<  *  Copyright:	© by the original author(s) and all contributors
---
>  *  Copyright:	? by the original author(s) and all contributors
136,136c136,136
< 		if (!newText.equals(fText)) {
---
> 		if (newText == null || !newText.equals(fText)) {
253a254,256
> 		if(newFont == null) {
> 			throw new IllegalArgumentException();
> 		}