RFR: 8263552: Use String.valueOf() for char-to-String conversion in ObjectStreamClass

[Conor Cleary]

On Sat, 20 Feb 2021 12:17:32 GMT, Сергей Цыпанов <github.com+10835776+stsypanov at openjdk.org> wrote:

> This is a very simple and trivial improvement about getting rid of pointless char wrapping into array

src/java.base/share/classes/java/io/ObjectStreamClass.java line 833:

> 831:             String fname = in.readUTF();
> 832:             String signature = ((tcode == 'L') || (tcode == '[')) ?
> 833:                 in.readTypeString() : String.valueOf(tcode);

Certainly more readable and it seems that the call to valueOf is equivalent to whay takes place with the original code. I can't see any difference semantically or performance-wise at a glance. LGTM

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PR: https://git.openjdk.java.net/jdk/pull/2660