new Integer vs valueOf

Posted by LB on Stack Overflow See other posts from Stack Overflow or by LB
Published on 2010-06-04T13:28:35Z Indexed on 2010/06/07 18:02 UTC
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java

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best-practices

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beginner

Hi,

I was using Sonar to make my code cleaner, and it pointed that I'm using new Integer(1) instead of Integer.valueOf(1). Because it seems that valueOf does not instantiate a new object so is more memory-friendly. How can valueOf not instantiate a new object ? How does it work ? Is this true for all integers ?

thanks.

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