Configure Eclipse JDT compiler for Java 21 - #8
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Explicitly set sourceCompatibility and targetCompatibility to Java 21 in the eclipse.jdt configuration block. This ensures that when Gradle regenerates Eclipse settings (e.g., on "Gradle > Refresh Gradle Project"), the JDT compiler source level is consistently set to Java 21, which is required for Java 16+ features like pattern matching for instanceof. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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Summary
Explicitly set sourceCompatibility and targetCompatibility to Java 21 in the eclipse.jdt configuration block. This ensures that when Gradle regenerates Eclipse settings (e.g., on "Gradle > Refresh Gradle Project"), the JDT compiler source level is consistently set to Java 21, which is required for Java 16+ features like pattern matching for instanceof.
Fixes
Resolves the Eclipse error: "the java feature 'type patterns' is only available with source level 16 and above"
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