OpenJDK 27 · java.lang.reflect.ParameterizedType · APIdia, the JavaDoc alternative

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 class or interface 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 class or interface declaration and have equal type parameters.

Method Summary

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

Inherited from java.lang.reflect.Type:: getTypeName

Method Detail

getActualTypeArguments back to summary

getActualTypeArguments	back to summary
public 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:Type[] an array of `Type` objects representing the actual type arguments to this type Exceptions TypeNotPresentException: if any of the actual type arguments refers to a non-existent class or interface declaration MalformedParameterizedTypeException: if any of the actual type parameters refer to a parameterized type that cannot be instantiated for any reason Since 1.5

public 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:Type[]

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

Exceptions

TypeNotPresentException:: if any of the actual type arguments refers to a non-existent class or interface declaration
MalformedParameterizedTypeException:: if any of the actual type parameters refer to a parameterized type that cannot be instantiated for any reason

Since

1.5

getOwnerType back to summary

getOwnerType	back to summary
public 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:Type a `Type` object representing the type that this type is a member of. If this type is a top-level type, `null` is returned Exceptions TypeNotPresentException: if the owner type refers to a non-existent class or interface declaration MalformedParameterizedTypeException: if the owner type refers to a parameterized type that cannot be instantiated for any reason Since 1.5

public 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:Type

a Type object representing the type that this type is a member of. If this type is a top-level type, null is returned

Exceptions

TypeNotPresentException:: if the owner type refers to a non-existent class or interface declaration
MalformedParameterizedTypeException:: if the owner type refers to a parameterized type that cannot be instantiated for any reason

Since

1.5

getRawType back to summary

getRawType	back to summary
public Type getRawType() Returns the `Type` object representing the class or interface that declared this type. API Note All `ParameterizedType` objects from core reflection return a `Class`. The static `Type` return type allows other implementations to represent classes and interfaces not in the current runtime. Returns:Type the `Type` object representing the class or interface that declared this type Since 1.5

public Type getRawType()

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

API Note

All ParameterizedType objects from core reflection return a Class. The static Type return type allows other implementations to represent classes and interfaces not in the current runtime.

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

public Interface ParameterizedType

Method Summary

Method Detail