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java performance ( comparision operator)

 
Greenhorn
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What is diff bet (null==var) and (var==null), Which is preferable & why
 
Ranch Hand
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Originally posted by Amit Shah shah:
What is diff bet (null==var) and (var==null), Which is preferable & why




i think you cannot do (null == var)....
 
(instanceof Sidekick)
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Hi, welcome to the ranch!

The two are indentical in function. The syntax (null == var) usually comes from C/C++ coders where (var = null) with one equal sign instead of two was a common typo not caught by the compiler, but (null = var) is caught. It's a habit you still see fairly often in Java, but the strongly typed syntax of Java allows the compiler to catch the missing equal sign almost all the time so it's nowhere near as important or useful.
 
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