Javacodegeeks iconJavacodegeeksSep 7, 2026

Java’s Sealed Classes Meet the Visitor Pattern

Replacing a classic GoF pattern with pattern matching: a before and after refactor of a Visitor hierarchy, collapsed into a sealed interface and an exhaustive switch expression.

Java’s Sealed Classes Meet the Visitor Pattern

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Replacing a classic GoF pattern with pattern matching: a before and after refactor of a Visitor hierarchy, collapsed into a sealed interface and an exhaustive switch expression.

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Replacing a classic GoF pattern with pattern matching: a before and after refactor of a Visitor hierarchy, collapsed into a sealed interface and an exhaustive switch expression.

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