fix(java): update palantir-java-format to 2.80.0 to fix JDK 25 EA compatibility

[devin-ai-integration]

Description

Linear ticket: N/A (customer issue reported via Slack)

Link to Devin run: https://app.devin.ai/sessions/bc7b796ece494de58f3ff09a4b925bea
Requested by: tanmay.singh@buildwithfern.com (@tstanmay13)

Fixes a NoSuchMethodError that customers encounter when building generated Java SDKs with JDK 25 EA. The error occurs because palantir-java-format 2.46.0 is incompatible with JDK 25's internal compiler API changes:

java.lang.NoSuchMethodError: 'java.util.Queue com.sun.tools.javac.util.Log$DeferredDiagnosticHandler.getDiagnostics()'

This was fixed in palantir-java-format 2.71.0 (July 2024) per palantir/palantir-java-format#1367.

Changes Made

Generator Configuration (generators/java/build.gradle):

• Updated spotless plugin: 6.25.0 → 7.2.1
• Updated palantir-java-format: 2.46.0 → 2.80.0

Generated SDK Template (AbstractGeneratorCli.java):

• Changed palantirJavaFormat() → palantirJavaFormat('2.80.0') to explicitly pin version
• Spotless plugin version remains at 6.11.0 for generated SDKs (Java 8 compatible)

Seed Snapshots:

• Updated 228 build.gradle files across seed/java-model and seed/java-sdk directories

Note: The intentional version split (spotless 7.2.1 for generator, 6.11.0 for generated SDKs) is required because:

• The generator itself uses Java 11, so it can use spotless 7.x
• Generated SDKs target Java 8 runtime, requiring spotless 6.x for build compatibility
• Both versions support palantir-java-format 2.80.0

Testing

• Verified build.gradle version changes in seed snapshots
• Generator build.gradle compiles successfully
• CRITICAL: CI must pass - seed tests will validate actual code compilation and formatting
• No code formatting changes captured in this PR (seed tests run with --skip-scripts)

Review Checklist

⚠️ Important Items:

1. Version Split Logic: Confirm that using spotless 7.2.1 for the generator (Java 11) and 6.11.0 for generated SDKs (Java 8 target) is correct and won't cause issues

2. CI Test Results: MUST wait for CI to pass before merging. The seed tests will validate:

   • Generated SDKs compile successfully with new formatter version
   • No unexpected formatting changes break builds
   • Java 8 compatibility is maintained

3. Formatting Behavior: Palantir-java-format 2.80.0 may format code differently than 2.46.0. Any cosmetic changes in generated Java code are expected but should be reviewed if CI shows differences

4. Backward Compatibility: Verify this doesn't break customers using Java 8-21 for builds (spotless 6.11.0 supports Java 8+)

5. Incomplete Snapshot Updates: This PR only updates build.gradle files. If the formatter produces different output, those changes will appear when CI runs the full seed tests

Known Limitations:

• Formatting changes (if any) not visible in this PR because local seed tests were run with --skip-scripts
• Relying on CI for comprehensive validation of the fix

Customer Impact

Positive:

• Fixes build failures for customers using JDK 25 EA
• Updates to latest stable formatter version (2.80.0) with bug fixes

Neutral:

• No impact on customers using JDK 8-21 for builds
• Generated SDK runtime requirements unchanged (still Java 8+)
• May see minor formatting differences in generated code (cosmetic only)

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