[PATCH] bakcporting of some trivial enhancements done for later JDKs

[Сергей Цыпанов]

Hello,

during recent years I've contributed some very simple patches into JDK which I guess can be back-ported into JDK8u

https://bugs.openjdk.java.net/browse/JDK-8196207 Inefficient ArrayList.subList().toArray()
https://bugs.openjdk.java.net/browse/JDK-8199800 Optimize Boolean.parseBoolean(String)
https://bugs.openjdk.java.net/browse/JDK-8240094 Optimize empty substring handling
https://bugs.openjdk.java.net/browse/JDK-8241649 Optimize Character.toString

Could this changes be encorporated into JDK8u? If yes then I will prepare separate patches for each ticket.

Regards,
Sergey Tsypanov