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Calling equals method on String

shashi kir
Greenhorn

Joined: Sep 09, 2011
Posts: 2
I have a String s="apple"
What is the difference between s.equals("apple") and "apple".equals(s)? and which is better? Please post the correct answer
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 38007
    
  22
That depends which language you are using. Both are valid syntax in Java, but they mean different things. I think only the one with = is valid SQL syntax, but you should check whether you want "apple" or 'apple' in SQL.

If you try passing s in Java and s is null, then s.equals... will throw a NullPointerException and "apple".equals(s) will evaluate to the value false.
 
 
subject: Calling equals method on String
 
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