This video explains a small but dangerous Java mistake that causes unexpected NullPointerException.
Two lines of code look almost identical:
s.equals("java")
"java".equals(s)
One crashes.
One doesn’t.
In this video, I explain:
- Why calling equals() on a null reference fails
- Why calling equals() on a constant is safe
- How Java handles method calls and null
- The best practice followed by experienced Java developers
- Why this mistake appears in real projects and interviews
This is not theory — this is a real-world Java pitfall that every developer should understand.
If you’re learning Java, preparing for interviews, or working on production code, this lesson will save you from subtle bugs.
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