Integer v/s int
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Siddhartha
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Published on 2012-09-01T03:13:07Z
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2012/09/01
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Read this on the oracle docs java.lang page:
Frequently it is necessary to represent a value of primitive type as if it were an object. The wrapper classes
Boolean
,Character
,Integer
,Long
,Float
, andDouble
serve this purpose.
I'm not sure I understand why these are needed. It says they have useful functions such as equals()
. But if I can do (a==b)
, why would I ever want to declare them as Integer
, use more memory and use equals()
? How does the memory usage differ for the 2?
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