description Replace Type Parameter Overview
When working with generic containers (like `List` or custom generic types), this refactoring allows you to systematically replace the type argument `T` with a concrete type or another generic type across all usages. It is vital for maintaining type safety when evolving generic APIs, ensuring that all consumers of the generic structure are updated correctly.
help Replace Type Parameter FAQ
What does the Replace Type Parameter refactoring do?
It replaces a generic type argument such as T with a concrete type or another generic type across the relevant usages. For example, a List<T> can be changed consistently to List<String>.
Why use Replace Type Parameter instead of editing each generic use by hand?
The refactoring updates related references systematically and helps preserve type safety. This reduces the chance that one method, field, or container keeps the old type argument by mistake.
Can Replace Type Parameter work with custom generic classes?
Yes. It is useful for generic containers such as List<T> and for custom classes that declare type parameters. The exact scope depends on the declarations and usages recognized by the JetBrains IDE.
What problem does this refactoring solve in a Java or Kotlin project?
It helps specialize or redesign generic code when a type parameter no longer needs to stay abstract. The result can make APIs clearer while allowing the IDE to check affected code for type errors.
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