RFR: 8303213: Avoid AtomicReference in TextComponentPrintable

[Brett Okken]

On Mon, 16 Jan 2023 20:25:02 GMT, Andrey Turbanov <aturbanov at openjdk.org> wrote:

> If CompareAndSwap is not used, then AtomicReference could be replaced with volatile. It simplified code a bit.

src/java.desktop/share/classes/sun/swing/text/TextComponentPrintable.java line 343:

> 341:                     public FontMetrics getFontMetrics(Font font) {
> 342:                         return (frc == null)
> 343:                             ? super.getFontMetrics(font)

Should the be set to local variable to avoid 2 volatile reads?

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PR: https://git.openjdk.org/jdk/pull/12018