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Tip: Avoid NullPointerException in String Equality Comparison

Learn why it's important to place literals first in equal comparisons.


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In equal comparisons it is recommended to place literals first. This way you eliminate the risk of NullPointerException:

//avoid 
obj.equals("foo");

//prefer
"foo".equals(obj);

 

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Octavia Andreea Anghel is a senior PHP developer currently working as a primary trainer for programming teams that participate at national and international software-development contests. She consults on developing educational projects at a national level. She is a coauthor of the book "XML Technologies--XML in Java" (Albastra, ISBN 978-973-650-210-1), for which she wrote the XML portions. In addition to PHP and XML, she's interested in software architecture, web services, UML, and high-performance unit tests.
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