Can we rely on String.isEmpty for checking null condition on a String in Java?

Question

I am passing an accountid as input from an XML file as shown, which will be parsed later and will be used in our code:

123456         


        

Answer 1

You can't use String.isEmpty() if it is null. Best is to have your own method to check null or empty.

public static boolean isBlankOrNull(String str) {
    return (str == null || "".equals(str.trim()));
}