Java 22: Leverage unnamed variables and patterns

Java 22 introduces the concept of unnamed variables and patterns, which significantly enhance code clarity by allowing developers to use an underscore (_) for variables and patterns that are intentionally left unused. This feature helps reduce code clutter and eliminate "unused variable" warnings, ultimately leading to higher-quality and more maintainable code. SonarQube complements these Java 22 features by introducing new rules (S7466, S7467, and S7475) that guide developers in effectively adopting unnamed variables and patterns. These rules advocate for the use of the var identifier for unnamed variables, the employment of unnamed variable patterns for unused exception parameters, and the removal of unnecessary type declarations in record pattern matching. By implementing these practices, developers can focus on relevant data, improving both the readability and maintainability of their code.