How to set null value if String is empty?

Question

Sometimes developers checks if Strings are null values, if yes, sets those Strings as empty value:

if (text == null) {
    text = "";
}

What I want to do is to write opposite if statement:

if (text.isEmpty()) {
    text = null;
}

But...first of all - I have to check (as usually) if this String is null to avoid NullPointerException, so right now it looks like this (very ugly but KISS):

if (!text == null) {
    if (text.isEmpty()) {
        text = null;
    }
}

My class has several String fields and for all of them I have to prepare this solution. Any basic ideas for more efficient code? Is it a good way to strech it to lambda expressions and iterate throught all String fields in this class?

Answer 1

Another alternative using Guava's emptyToNull:

text = Strings.emptyToNull(text);