ParameterizedType (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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Java™ Platform
Standard Ed. 6

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java.lang.reflect
Interface ParameterizedType

All Superinterfaces:: Type

public interface ParameterizedType
extends Type
extends Type

ParameterizedType represents a parameterized type such as Collection<String>.

A parameterized type is created the first time it is needed by a reflective method, as specified in this package. When a parameterized type p is created, the generic type declaration that p instantiates is resolved, and all type arguments of p are created recursively. See TypeVariable for details on the creation process for type variables. Repeated creation of a parameterized type has no effect.

Instances of classes that implement this interface must implement an equals() method that equates any two instances that share the same generic type declaration and have equal type parameters.

Since:: 1.5

Method Summary

Type[] getActualTypeArguments()
          Returns an array of Type objects representing the actual type arguments to this type.

Type getOwnerType()
          Returns a Type object representing the type that this type is a member of.

Type getRawType()
          Returns the Type object representing the class or interface that declared this type.

Method Summary
`Type[]`	`getActualTypeArguments()` Returns an array of `Type` objects representing the actual type arguments to this type.
`Type`	`getOwnerType()` Returns a `Type` object representing the type that this type is a member of.
`Type`	`getRawType()` Returns the `Type` object representing the class or interface that declared this type.

Method Detail

getActualTypeArguments

Type[] getActualTypeArguments()

Returns an array of Type objects representing the actual type arguments to this type.

Note that in some cases, the returned array be empty. This can occur if this type represents a non-parameterized type nested within a parameterized type.

Returns:: an array of Type objects representing the actual type arguments to this type
Throws:: TypeNotPresentException - if any of the actual type arguments refers to a non-existent type declaration; MalformedParameterizedTypeException - if any of the actual type parameters refer to a parameterized type that cannot be instantiated for any reason
Since:: 1.5

getRawType

Type getRawType()

Returns the Type object representing the class or interface that declared this type.

Returns:: the Type object representing the class or interface that declared this type
Since:: 1.5

getOwnerType

Type getOwnerType()

Returns a Type object representing the type that this type is a member of. For example, if this type is O<T>.I<S>, return a representation of O<T>.

If this type is a top-level type, null is returned.

Returns:: a Type object representing the type that this type is a member of. If this type is a top-level type, null is returned
Throws:: TypeNotPresentException - if the owner type refers to a non-existent type declaration; MalformedParameterizedTypeException - if the owner type refers to a parameterized type that cannot be instantiated for any reason
Since:: 1.5