RFR: 8369312: Refactor Float.toHexString() to avoid use of regex

[Shaojin Wen]

On Tue, 14 Oct 2025 01:13:16 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Simple refactoring to avoid use the regular expressions. Existing tests in
> 
> java/lang/Double/ToHexString.java
> 
> cover the float conversions too.

The exponent -1022 is at the end, so the following implementation might be better.

return s.endsWith("-1022") ? s.substring(0, s.length() - 5).concat("-126") : s;

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PR Comment: https://git.openjdk.org/jdk/pull/27780#issuecomment-3408896057