Java – null and stringutils Differences between isblank()

I want to check whether a string is empty. I want to know which of the following is better, which is better and under which circumstances

In particular, this error occurs when I use "isnotblank": "cannot convert to Java. Lang. string"

this.text.getData() != null <--- works perfectly fine.
StringUtils.isNotBlank((String)this.text.getData()) <- doesn't work.

If "null" is not the best solution, what can I use?

Solution

If you want any non null data to be a string

If 'data' can be an object of a certain type, then stringutils is not the correct solution at all and null check is the correct approach!