Gracefully avoiding NullPointerException in Java

Question

Consider this line:

if (object.getAttribute(\"someAttr\").equals(\"true\")) { // ....

Obviously this line is a potential bug, the attribute

Answer 1

Util.isEmpty(string) - returns string == null || string.trim().isEmpty() Util.notNull(string) returns "" if string == null, string otherwise. Util.isNotEmpty(string) returns ! Util.isEmpty(string)

And we have a convention that for strings, Util.isEmpty(string) semantically means true and Util.isNotEmpty(string) semantically means false.