RFR: 8049892: Replace uses of 'new Integer()' with appropriate alternative across core classes

[Otávio Gonçalves de Santana]

https://bugs.openjdk.java.net/browse/JDK-8049892
http://cr.openjdk.java.net/~prr/8049892/

-- 
Cheers!.

Otávio Gonçalves de Santana

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