RFR: 8373928: 4 Dangling pointer defect groups in java.c [v2]

[Henry Jen]

> Fix dangling pointers.

Henry Jen has updated the pull request incrementally with one additional commit since the last revision:

  Update copyright year

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Changes:
  - all: https://git.openjdk.org/jdk/pull/29351/files
  - new: https://git.openjdk.org/jdk/pull/29351/files/fa7b746e..e946aa2d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29351&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29351&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/29351.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29351/head:pull/29351

PR: https://git.openjdk.org/jdk/pull/29351