8289706: (cs) Avoid redundant TreeMap.containsKey call in AbstractCharsetProvider

[turbanoff]

The method sun.nio.cs.ext.AbstractCharsetProvider#put is effectively equivalent of Map.putIfAbsent call.

jdk/src/jdk.charsets/share/classes/sun/nio/cs/ext/AbstractCharsetProvider.java

Lines 81 to 84 in df063f7

	private static <K,V> void put(Map<K,V> m, K name, V value) {
	if (!m.containsKey(name))
	m.put(name, value);
	}

Instead of hand-written method we can use putIfAbsent directly.
I makes code cleaner and gives a bit of performance.

---

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Issue

• JDK-8289706: (cs) Avoid redundant TreeMap.containsKey call in AbstractCharsetProvider

Reviewers

• Attila Szegedi (@szegedi - Reviewer)
• Naoto Sato (@naotoj - Reviewer)

Reviewing

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[openjdk]

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[openjdk]

@turbanoff This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8289706: (cs) Avoid redundant TreeMap.containsKey call in AbstractCharsetProvider

Reviewed-by: attila, naoto

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 917 new commits pushed to the master branch:

• 77c3bbf: 8289617: Remove test/jdk/java/net/ServerSocket/ThreadStop.java
• a5934cd: 8289698: AArch64: Need to relativize extended_sp in frame
• fd1bb07: 8287603: Avoid redundant HashMap.containsKey calls in NimbusDefaults.getDerivedColor
• 4c997ba: 8289520: G1: Remove duplicate checks in G1BarrierSetC1::post_barrier
• 1b997db: 8289427: compiler/compilercontrol/jcmd/ClearDirectivesFileStackTest.java failed with null setting
• 688712f: 8289633: Forbid raw C-heap allocation functions in hotspot and fix findings
• df063f7: 8289484: Cleanup unnecessary null comparison before instanceof check in java.rmi
• 9ccae70: 8287593: ShortResponseBody could be made more resilient to rogue connections
• bad9ffe: 8288947: G1: Consolidate per-region is-humongous query in G1CollectedHeap
• b5d9656: 8288971: AArch64: Clean up stack and register handling in interpreter
• ... and 907 more: https://git.openjdk.org/jdk/compare/d9541c5e9f68f2b76e6e1d09bc24750b7c9a5b5b...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[mlbridge]

Webrevs

• 00: Full (5dcb9a9f)

[turbanoff]

Thank your reviewers!
/integrate

[openjdk]

Going to push as commit f783244.
Since your change was applied there have been 921 commits pushed to the master branch:

• fafe8b3: 8289604: compiler/vectorapi/VectorLogicalOpIdentityTest.java failed on x86 AVX1 system
• 3515604: 8280481: Duplicated stubs to interpreter for static calls
• d48694d: 8283335: Add exists and readAttributesIfExists methods to FileSystemProvider
• c45d613: 8289687: [JVMCI] bug in HotSpotResolvedJavaMethodImpl.equals
• 77c3bbf: 8289617: Remove test/jdk/java/net/ServerSocket/ThreadStop.java
• a5934cd: 8289698: AArch64: Need to relativize extended_sp in frame
• fd1bb07: 8287603: Avoid redundant HashMap.containsKey calls in NimbusDefaults.getDerivedColor
• 4c997ba: 8289520: G1: Remove duplicate checks in G1BarrierSetC1::post_barrier
• 1b997db: 8289427: compiler/compilercontrol/jcmd/ClearDirectivesFileStackTest.java failed with null setting
• 688712f: 8289633: Forbid raw C-heap allocation functions in hotspot and fix findings
• ... and 911 more: https://git.openjdk.org/jdk/compare/d9541c5e9f68f2b76e6e1d09bc24750b7c9a5b5b...master

Your commit was automatically rebased without conflicts.

[openjdk]

@turbanoff Pushed as commit f783244.

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