[jdk21u-dev] RFR: 8371652: Double.parseDouble with large strings fails

[Raffaello Giulietti]

On Thu, 27 Nov 2025 02:32:13 GMT, Lei Zhu <duke at openjdk.org> wrote:

> Hi all,
> 
> This pull request is the backport of [JDK-8343829](https://bugs.openjdk.org/browse/JDK-8343829)
> 
> Please review this code.
> 
> Thanks!

test/jdk/java/lang/Double/ParseLargeStrings.java line 27:

> 25:  * @test
> 26:  * @bug 8371652
> 27:  * @summary Double.parseDouble with large strings should return Double Infinity

Large strings can return _any_ `double`, not only infinity.
Think of 1 billions `' '` (or `'0'`) followed by a `'1'`, which returns `1.0`.
Or 1 billion `'9'` followed by `e-10000000000000000000`, which returns `0.0`.
And so on.

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PR Review Comment: https://git.openjdk.org/jdk21u-dev/pull/2488#discussion_r2567902931