StringBuilder append() and null values

Question

I have a list of Strings, and I want to concatenate them with spaces in between. So I\'m using StringBuilder. Now if any of the Strings ar

Answer 1

For my purpose, I needed to generalize Answer #2 a little bit. Here is the same function, taking Object as argument, instead of String:

private String nullToEmpty(Object obj) {
    return obj == null ? "" : obj.toString();
}