20 lines
855 B
Plaintext
20 lines
855 B
Plaintext
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[[kotlin-classes-interfaces]]
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= Classes and Interfaces
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The Spring Framework supports various Kotlin constructs, such as instantiating Kotlin classes
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through primary constructors, immutable classes data binding, and function optional parameters
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with default values.
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Kotlin parameter names are recognized through a dedicated `KotlinReflectionParameterNameDiscoverer`,
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which allows finding interface method parameter names without requiring the Java 8 `-parameters`
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compiler flag to be enabled during compilation. (For completeness, we nevertheless recommend
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running the Kotlin compiler with its `-java-parameters` flag for standard Java parameter exposure.)
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You can declare configuration classes as
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https://kotlinlang.org/docs/reference/nested-classes.html[top level or nested but not inner],
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since the later requires a reference to the outer class.
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