RFR: 8341199: Use ClassFile's new API loadConstant(int)

[Claes Redestad]

On Mon, 30 Sep 2024 10:03:57 GMT, Shaojin Wen <swen at openjdk.org> wrote:

> The new API loadConstant(int) can shorten the calling path and can replace ldc when the parameter is of int/Integer type.

Marked as reviewed by redestad (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/21259#pullrequestreview-2337353537