Add Java 26 early-access support via rewrite-java-next module#6789
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Add Java 26 early-access support via rewrite-java-next module#6789
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Adds a new rewrite-java-next module (copy of rewrite-java-25) to support Java 26 pre-release builds, enabling early validation of the OpenRewrite parser against upcoming JDK versions. Updates version detection cascade in JavaParser and CI workflows to include Java 26.
timtebeek
commented
Feb 22, 2026
timtebeek
commented
Feb 22, 2026
Adds --enable-preview to the ReloadableJavaNextParser compiler options so the parser can handle preview language features like JEP 530 (Primitive Types in Patterns, instanceof, and switch). Adds tests for primitive type patterns in switch expressions and instanceof with guards, narrowing conversions, and different primitive types (int, long, float).
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It looks like we should be good to support the non-preview features in Java 26 already, and even the We'll defer this effort until later, such that we don't have to unnecessarily maintain yet another Java parser with any changes. |
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Summary
Adds a new
rewrite-java-nextmodule to support Java 26 early-access builds. This enables early validation of the OpenRewrite parser against pre-release JDK versions. The module is structured as a copy ofrewrite-java-25with version references updated to 26.Changes
rewrite-java-nextmodule with Java 26 toolchain and parser implementationJavaParserversion detection cascade to preferJavaNextParserfor JDK 26+Java25toJavaNext(e.g.,JavaNextParser,ReloadableJavaNextParser)