What is the correct way to check if a String is empty or null in Java, and how can I avoid potential errors?

General Discussions
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2

I’ve been in that spot before! The issue is that using equals(null) throws a NullPointerException, so you definitely want to avoid that. To safely java check if string is empty, I recommend this classic approach:

if (string == null || string.isEmpty()) {
    Log.d("iftrue", "String is null or empty");
} else {
    Log.d("iffalse", "String is not empty");
}

This first checks if the string is null to avoid any null pointer exceptions, and only if it’s not null does it check if it’s empty. It’s simple, safe, and pretty much the standard way to go about it in Java.