Interface WildcardType

All Superinterfaces:
Type

public interface WildcardType
extends Type

WildcardType represents a wildcard type expression, such as ?, ? extends Number, or ? super Integer.

Since:
1.5

Methods

Modifier and Type Method and Description
Type[] getLowerBounds()

Returns an array of Type objects representing the lower bound(s) of this type variable.
Type[] getUpperBounds()

Returns an array of Type objects representing the upper bound(s) of this type variable.

Methods inherited from interface java.lang.reflect.Type

getTypeName

Methods

getUpperBounds

Type[] getUpperBounds()

Returns an array of Type objects representing the upper bound(s) of this type variable. Note that if no upper bound is explicitly declared, the upper bound is Object.

For each upper bound B :

  • if B is a parameterized type or a type variable, it is created, (see ParameterizedType for the details of the creation process for parameterized types).
  • Otherwise, B is resolved.
Returns:
an array of Types representing the upper bound(s) of this type variable
Throws:
TypeNotPresentException - if any of the bounds refers to a non-existent type declaration
MalformedParameterizedTypeException - if any of the bounds refer to a parameterized type that cannot be instantiated for any reason

getLowerBounds

Type[] getLowerBounds()

Returns an array of Type objects representing the lower bound(s) of this type variable. Note that if no lower bound is explicitly declared, the lower bound is the type of null. In this case, a zero length array is returned.

For each lower bound B :

  • if B is a parameterized type or a type variable, it is created, (see ParameterizedType for the details of the creation process for parameterized types).
  • Otherwise, B is resolved.
Returns:
an array of Types representing the lower bound(s) of this type variable
Throws:
TypeNotPresentException - if any of the bounds refers to a non-existent type declaration
MalformedParameterizedTypeException - if any of the bounds refer to a parameterized type that cannot be instantiated for any reason

© 1993, 2020, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/WildcardType.html