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> As specified in JEP 401, when preview features are enabled, the following standard library classes are considered to be value classes: > > java. lang. Byte > java. lang. Short > java. lang. Integer > java. lang. Long > java. lang. Float
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<meta charset="utf-8"></head><body><pre style="font-family: sans-serif; font-size: 100%; white-space: pre-wrap; word-wrap: break-word">> As specified in JEP 401, when preview features are enabled, the following standard library classes are considered to be value classes:
>
> java.lang.Byte
> java.lang.Short
> java.lang.Integer
> java.lang.Long
> java.lang.Float
> java.lang.Double
> java.lang.Boolean
> java.lang.Character
> java.util.Optional
> java.lang.Number
> java.lang.Record
>
>
> These value classes are loaded only if --enable-preview is set. All valhalla tests should have preview enabled to ensure testing with the proper set of library classes.
>
> Testing: Run `jdk_valhalla` and `hotspot_valhalla_runtime` with `-Xint` with and without `--enable-preview`. The result is pretty good. [JDK-8327637](https://bugs.openjdk.org/browse/JDK-8327637) and [JDK-8327639](https://bugs.openjdk.org/browse/JDK-8327639) need further investigation.
Mandy Chung has updated the pull request incrementally with one additional commit since the last revision:
simplify the check
-------------
Changes:
- all: https://git.openjdk.org/valhalla/pull/1040/files
- new: https://git.openjdk.org/valhalla/pull/1040/files/ff15f65e..c04cf1ba
Webrevs:
- full: https://webrevs.openjdk.org/?repo=valhalla&pr=1040&range=02
- incr: https://webrevs.openjdk.org/?repo=valhalla&pr=1040&range=01-02
Stats: 10 lines in 1 file changed: 0 ins; 6 del; 4 mod
Patch: https://git.openjdk.org/valhalla/pull/1040.diff
Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1040/head:pull/1040
PR: https://git.openjdk.org/valhalla/pull/1040
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